* How to handle infinite too_many_isolated() loop (for OOM detection rework v4) ?
@ 2016-02-09 14:49 Tetsuo Handa
2016-02-11 7:06 ` Tetsuo Handa
0 siblings, 1 reply; 4+ messages in thread
From: Tetsuo Handa @ 2016-02-09 14:49 UTC (permalink / raw)
To: mhocko
Cc: rientjes, akpm, torvalds, hannes, mgorman, hillf.zj,
kamezawa.hiroyu, linux-mm
I did an OOM torture test using a reproducer shown below. This version
is intended for consuming the last free pages (before the OOM killer is
invoked) for buffered writes so that __GFP_FS allocations will be blocked
on waiting for !__GFP_FS to flush the written data to disk.
---------- reproducer program ----------
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <poll.h>
static char use_delay = 0;
static void sigcld_handler(int unused)
{
use_delay = 1;
}
int main(int argc, char *argv[])
{
static char buffer[4096] = { };
char *buf = NULL;
unsigned long size;
int i;
signal(SIGCLD, sigcld_handler);
for (i = 0; i < 1024; i++) {
if (fork() == 0) {
int fd = open("/proc/self/oom_score_adj", O_WRONLY);
write(fd, "1000", 4);
close(fd);
sleep(1);
if (!i)
pause();
snprintf(buffer, sizeof(buffer), "/tmp/file.%u", getpid());
fd = open(buffer, O_WRONLY | O_CREAT | O_APPEND, 0600);
while (write(fd, buffer, sizeof(buffer)) == sizeof(buffer)) {
poll(NULL, 0, 10);
fsync(fd);
}
_exit(0);
}
}
for (size = 1048576; size < 512UL * (1 << 30); size <<= 1) {
char *cp = realloc(buf, size);
if (!cp) {
size >>= 1;
break;
}
buf = cp;
}
sleep(2);
/* Will cause OOM due to overcommit */
for (i = 0; i < size; i += 4096) {
buf[i] = 0;
if (use_delay) /* Give children a chance to write(). */
poll(NULL, 0, 10);
}
pause();
return 0;
}
---------- reproducer program ----------
I used kmallocwd patch shown below for dumping information of stalling
tasks. This version also shows how many times out_of_memory() is called
and number of PF_EXITING (but !TASK_DEAD) tasks for demonstrating that
out_of_memory() is not called.
---------- kmallocwd patch (for linux-next-20160209) ----------
diff --git a/include/linux/oom.h b/include/linux/oom.h
index 45993b8..3f03787 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -113,6 +113,8 @@ static inline bool task_will_free_mem(struct task_struct *task)
!(task->signal->flags & SIGNAL_GROUP_COREDUMP);
}
+extern unsigned int out_of_memory_count;
+
/* sysctls */
extern int sysctl_oom_dump_tasks;
extern int sysctl_oom_kill_allocating_task;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 7138917..0aeff29 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1387,6 +1387,28 @@ struct tlbflush_unmap_batch {
bool writable;
};
+struct memalloc_info {
+ /* For locking and progress monitoring. */
+ unsigned int sequence;
+ /*
+ * 0: not doing __GFP_RECLAIM allocation.
+ * 1: doing non-recursive __GFP_RECLAIM allocation.
+ * 2: doing recursive __GFP_RECLAIM allocation.
+ */
+ u8 valid;
+ /*
+ * bit 0: Will be reported as OOM victim.
+ * bit 1: Will be reported as dying task.
+ * bit 2: Will be reported as stalling task.
+ */
+ u8 type;
+ /* Started time in jiffies as of valid == 1. */
+ unsigned long start;
+ /* Requested order and gfp flags as of valid == 1. */
+ unsigned int order;
+ gfp_t gfp;
+};
+
struct task_struct {
volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
void *stack;
@@ -1849,6 +1871,9 @@ struct task_struct {
#ifdef CONFIG_MMU
struct list_head oom_reaper_list;
#endif
+#ifdef CONFIG_DETECT_MEMALLOC_STALL_TASK
+ struct memalloc_info memalloc;
+#endif
/* CPU-specific state of this task */
struct thread_struct thread;
/*
diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h
index c9e4731..fb3004a 100644
--- a/include/linux/sched/sysctl.h
+++ b/include/linux/sched/sysctl.h
@@ -9,6 +9,9 @@ extern int sysctl_hung_task_warnings;
extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos);
+#ifdef CONFIG_DETECT_MEMALLOC_STALL_TASK
+extern unsigned long sysctl_memalloc_task_timeout_secs;
+#endif
#else
/* Avoid need for ifdefs elsewhere in the code */
enum { sysctl_hung_task_timeout_secs = 0 };
diff --git a/kernel/fork.c b/kernel/fork.c
index b617af6..78283c6 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1425,6 +1425,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
p->sequential_io_avg = 0;
#endif
+#ifdef CONFIG_DETECT_MEMALLOC_STALL_TASK
+ p->memalloc.sequence = 0;
+#endif
+
/* Perform scheduler related setup. Assign this task to a CPU. */
retval = sched_fork(clone_flags, p);
if (retval)
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index d234022..745a78c 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -16,6 +16,7 @@
#include <linux/export.h>
#include <linux/sysctl.h>
#include <linux/utsname.h>
+#include <linux/oom.h> /* out_of_memory_count */
#include <trace/events/sched.h>
/*
@@ -72,6 +73,214 @@ static struct notifier_block panic_block = {
.notifier_call = hung_task_panic,
};
+#ifdef CONFIG_DETECT_MEMALLOC_STALL_TASK
+/*
+ * Zero means infinite timeout - no checking done:
+ */
+unsigned long __read_mostly sysctl_memalloc_task_timeout_secs =
+ CONFIG_DEFAULT_MEMALLOC_TASK_TIMEOUT;
+static struct memalloc_info memalloc; /* Filled by is_stalling_task(). */
+
+static long memalloc_timeout_jiffies(unsigned long last_checked, long timeout)
+{
+ struct task_struct *g, *p;
+ long t;
+ unsigned long delta;
+
+ /* timeout of 0 will disable the watchdog */
+ if (!timeout)
+ return MAX_SCHEDULE_TIMEOUT;
+ /* At least wait for timeout duration. */
+ t = last_checked - jiffies + timeout * HZ;
+ if (t > 0)
+ return t;
+ /* Calculate how long to wait more. */
+ t = timeout * HZ;
+ delta = t - jiffies;
+
+ /*
+ * We might see outdated values in "struct memalloc_info" here.
+ * We will recheck later using is_stalling_task().
+ */
+ preempt_disable();
+ rcu_read_lock();
+ for_each_process_thread(g, p) {
+ if (likely(!p->memalloc.valid))
+ continue;
+ t = min_t(long, t, p->memalloc.start + delta);
+ if (unlikely(t <= 0))
+ goto stalling;
+ }
+ stalling:
+ rcu_read_unlock();
+ preempt_enable();
+ return t;
+}
+
+/**
+ * is_stalling_task - Check and copy a task's memalloc variable.
+ *
+ * @task: A task to check.
+ * @expire: Timeout in jiffies.
+ *
+ * Returns true if a task is stalling, false otherwise.
+ */
+static bool is_stalling_task(const struct task_struct *task,
+ const unsigned long expire)
+{
+ const struct memalloc_info *m = &task->memalloc;
+
+ /*
+ * If start_memalloc_timer() is updating "struct memalloc_info" now,
+ * we can ignore it because timeout jiffies cannot be expired as soon
+ * as updating it completes.
+ */
+ if (!m->valid || (m->sequence & 1))
+ return false;
+ smp_rmb(); /* Block start_memalloc_timer(). */
+ memalloc.start = m->start;
+ memalloc.order = m->order;
+ memalloc.gfp = m->gfp;
+ smp_rmb(); /* Unblock start_memalloc_timer(). */
+ memalloc.sequence = m->sequence;
+ /*
+ * If start_memalloc_timer() started updating it while we read it,
+ * we can ignore it for the same reason.
+ */
+ if (!m->valid || (memalloc.sequence & 1))
+ return false;
+ /* This is a valid "struct memalloc_info". Check for timeout. */
+ return time_after_eq(expire, memalloc.start);
+}
+
+/* Check for memory allocation stalls. */
+static void check_memalloc_stalling_tasks(unsigned long timeout)
+{
+ char buf[128];
+ struct task_struct *g, *p;
+ unsigned long now;
+ unsigned long expire;
+ unsigned int sigkill_pending;
+ unsigned int exiting_tasks;
+ unsigned int memdie_pending;
+ unsigned int stalling_tasks;
+
+ cond_resched();
+ now = jiffies;
+ /*
+ * Report tasks that stalled for more than half of timeout duration
+ * because such tasks might be correlated with tasks that already
+ * stalled for full timeout duration.
+ */
+ expire = now - timeout * (HZ / 2);
+ /* Count stalling tasks, dying and victim tasks. */
+ sigkill_pending = 0;
+ exiting_tasks = 0;
+ memdie_pending = 0;
+ stalling_tasks = 0;
+ preempt_disable();
+ rcu_read_lock();
+ for_each_process_thread(g, p) {
+ u8 type = 0;
+
+ if (test_tsk_thread_flag(p, TIF_MEMDIE)) {
+ type |= 1;
+ memdie_pending++;
+ }
+ if (fatal_signal_pending(p)) {
+ type |= 2;
+ sigkill_pending++;
+ }
+ if ((p->flags & PF_EXITING) && p->state != TASK_DEAD) {
+ type |= 8;
+ exiting_tasks++;
+ }
+ if (is_stalling_task(p, expire)) {
+ type |= 4;
+ stalling_tasks++;
+ }
+ p->memalloc.type = type;
+ }
+ rcu_read_unlock();
+ preempt_enable();
+ if (!stalling_tasks)
+ return;
+ /* Report stalling tasks, dying and victim tasks. */
+ pr_warn("MemAlloc-Info: %u stalling task, %u dying task, %u exiting task, %u victim task. oom_count=%u\n",
+ stalling_tasks, sigkill_pending, exiting_tasks, memdie_pending, out_of_memory_count);
+ cond_resched();
+ preempt_disable();
+ rcu_read_lock();
+ restart_report:
+ for_each_process_thread(g, p) {
+ bool can_cont;
+ u8 type;
+
+ if (likely(!p->memalloc.type))
+ continue;
+ p->memalloc.type = 0;
+ /* Recheck in case state changed meanwhile. */
+ type = 0;
+ if (test_tsk_thread_flag(p, TIF_MEMDIE))
+ type |= 1;
+ if (fatal_signal_pending(p))
+ type |= 2;
+ if ((p->flags & PF_EXITING) && p->state != TASK_DEAD)
+ type |= 8;
+ if (is_stalling_task(p, expire)) {
+ type |= 4;
+ snprintf(buf, sizeof(buf),
+ " seq=%u gfp=0x%x(%pGg) order=%u delay=%lu",
+ memalloc.sequence >> 1, memalloc.gfp, &memalloc.gfp,
+ memalloc.order, now - memalloc.start);
+ }
+ if (unlikely(!type))
+ continue;
+ /*
+ * Victim tasks get pending SIGKILL removed before arriving at
+ * do_exit(). Therefore, print " exiting" instead for " dying".
+ */
+ pr_warn("MemAlloc: %s(%u)%s%s%s%s%s\n", p->comm, p->pid,
+ (type & 4) ? buf : "",
+ (p->state & TASK_UNINTERRUPTIBLE) ?
+ " uninterruptible" : "",
+ (type & 8) ? " exiting" : "",
+ (type & 2) ? " dying" : "",
+ (type & 1) ? " victim" : "");
+ sched_show_task(p);
+ debug_show_held_locks(p);
+ /*
+ * Since there could be thousands of tasks to report, we always
+ * sleep and try to flush printk() buffer after each report, in
+ * order to avoid RCU stalls and reduce possibility of messages
+ * being dropped by continuous printk() flood.
+ *
+ * Since not yet reported tasks have p->memalloc.type > 0, we
+ * can simply restart this loop in case "g" or "p" went away.
+ */
+ get_task_struct(g);
+ get_task_struct(p);
+ rcu_read_unlock();
+ preempt_enable();
+ schedule_timeout_interruptible(1);
+ preempt_disable();
+ rcu_read_lock();
+ can_cont = pid_alive(g) && pid_alive(p);
+ put_task_struct(p);
+ put_task_struct(g);
+ if (!can_cont)
+ goto restart_report;
+ }
+ rcu_read_unlock();
+ preempt_enable();
+ cond_resched();
+ /* Show memory information. (SysRq-m) */
+ show_mem(0);
+ /* Show workqueue state. */
+ show_workqueue_state();
+}
+#endif /* CONFIG_DETECT_MEMALLOC_STALL_TASK */
+
static void check_hung_task(struct task_struct *t, unsigned long timeout)
{
unsigned long switch_count = t->nvcsw + t->nivcsw;
@@ -227,20 +436,35 @@ EXPORT_SYMBOL_GPL(reset_hung_task_detector);
static int watchdog(void *dummy)
{
unsigned long hung_last_checked = jiffies;
+#ifdef CONFIG_DETECT_MEMALLOC_STALL_TASK
+ unsigned long stall_last_checked = hung_last_checked;
+#endif
set_user_nice(current, 0);
for ( ; ; ) {
unsigned long timeout = sysctl_hung_task_timeout_secs;
long t = hung_timeout_jiffies(hung_last_checked, timeout);
-
+#ifdef CONFIG_DETECT_MEMALLOC_STALL_TASK
+ unsigned long timeout2 = sysctl_memalloc_task_timeout_secs;
+ long t2 = memalloc_timeout_jiffies(stall_last_checked,
+ timeout2);
+
+ if (t2 <= 0) {
+ check_memalloc_stalling_tasks(timeout2);
+ stall_last_checked = jiffies;
+ continue;
+ }
+#else
+ long t2 = t;
+#endif
if (t <= 0) {
if (!atomic_xchg(&reset_hung_task, 0))
check_hung_uninterruptible_tasks(timeout);
hung_last_checked = jiffies;
continue;
}
- schedule_timeout_interruptible(t);
+ schedule_timeout_interruptible(min(t, t2));
}
return 0;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index d479707..9844091 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1061,6 +1061,16 @@ static struct ctl_table kern_table[] = {
.proc_handler = proc_dointvec_minmax,
.extra1 = &neg_one,
},
+#ifdef CONFIG_DETECT_MEMALLOC_STALL_TASK
+ {
+ .procname = "memalloc_task_timeout_secs",
+ .data = &sysctl_memalloc_task_timeout_secs,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = proc_dohung_task_timeout_secs,
+ .extra2 = &hung_task_timeout_max,
+ },
+#endif
#endif
#ifdef CONFIG_COMPAT
{
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d6449c4..cb27ef5 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -852,6 +852,30 @@ config WQ_WATCHDOG
state. This can be configured through kernel parameter
"workqueue.watchdog_thresh" and its sysfs counterpart.
+config DETECT_MEMALLOC_STALL_TASK
+ bool "Detect tasks stalling inside memory allocator"
+ default n
+ depends on DETECT_HUNG_TASK
+ help
+ This option emits warning messages and traces when memory
+ allocation requests are stalling, in order to catch unexplained
+ hangups/reboots caused by memory allocation stalls.
+
+config DEFAULT_MEMALLOC_TASK_TIMEOUT
+ int "Default timeout for stalling task detection (in seconds)"
+ depends on DETECT_MEMALLOC_STALL_TASK
+ default 10
+ help
+ This option controls the default timeout (in seconds) used
+ to determine when a task has become non-responsive and should
+ be considered stalling inside memory allocator.
+
+ It can be adjusted at runtime via the kernel.memalloc_task_timeout_secs
+ sysctl or by writing a value to
+ /proc/sys/kernel/memalloc_task_timeout_secs.
+
+ A timeout of 0 disables the check. The default is 10 seconds.
+
endmenu # "Debug lockups and hangs"
config PANIC_ON_OOPS
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 7653055..1bb1b60 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -44,6 +44,8 @@
#define CREATE_TRACE_POINTS
#include <trace/events/oom.h>
+unsigned int out_of_memory_count;
+
int sysctl_panic_on_oom;
int sysctl_oom_kill_allocating_task;
int sysctl_oom_dump_tasks = 1;
@@ -849,6 +851,7 @@ bool out_of_memory(struct oom_control *oc)
unsigned int uninitialized_var(points);
enum oom_constraint constraint = CONSTRAINT_NONE;
+ out_of_memory_count++;
if (oom_killer_disabled)
return false;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4ca4ead..e413cb8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3372,6 +3372,37 @@ got_pg:
return page;
}
+#ifdef CONFIG_DETECT_MEMALLOC_STALL_TASK
+static void start_memalloc_timer(const gfp_t gfp_mask, const int order)
+{
+ struct memalloc_info *m = ¤t->memalloc;
+
+ /* We don't check for stalls for !__GFP_RECLAIM allocations. */
+ if (!(gfp_mask & __GFP_RECLAIM))
+ return;
+ /* We don't check for stalls for nested __GFP_RECLAIM allocations */
+ if (!m->valid) {
+ m->sequence++;
+ smp_wmb(); /* Block is_stalling_task(). */
+ m->start = jiffies;
+ m->order = order;
+ m->gfp = gfp_mask;
+ smp_wmb(); /* Unblock is_stalling_task(). */
+ m->sequence++;
+ }
+ m->valid++;
+}
+
+static void stop_memalloc_timer(const gfp_t gfp_mask)
+{
+ if (gfp_mask & __GFP_RECLAIM)
+ current->memalloc.valid--;
+}
+#else
+#define start_memalloc_timer(gfp_mask, order) do { } while (0)
+#define stop_memalloc_timer(gfp_mask) do { } while (0)
+#endif
+
/*
* This is the 'heart' of the zoned buddy allocator.
*/
@@ -3439,7 +3470,9 @@ retry_cpuset:
alloc_mask = memalloc_noio_flags(gfp_mask);
ac.spread_dirty_pages = false;
+ start_memalloc_timer(alloc_mask, order);
page = __alloc_pages_slowpath(alloc_mask, order, &ac);
+ stop_memalloc_timer(alloc_mask);
}
if (kmemcheck_enabled && page)
---------- kmallocwd patch (for linux-next-20160209) ----------
The result is that, we have no TIF_MEMDIE tasks but nobody is calling
out_of_memory(). That is, OOM livelock without invoking the OOM killer.
They seem to be waiting at congestion_wait() from too_many_isolated()
loop called from shrink_inactive_list() because nobody can make forward
progress. I think we must not wait forever at too_many_isolated() loop.
Complete log is at http://I-love.SAKURA.ne.jp/tmp/serial-20160209.txt.xz .
---------- console log ----------
[ 77.972875] MemAlloc-Info: 336 stalling task, 3 dying task, 0 exiting task, 0 victim task. oom_count=6
[ 109.433056] MemAlloc-Info: 343 stalling task, 4 dying task, 0 exiting task, 0 victim task. oom_count=7
[ 188.076342] MemAlloc-Info: 185 stalling task, 30 dying task, 45 exiting task, 0 victim task. oom_count=1593
[ 214.760724] MemAlloc-Info: 185 stalling task, 30 dying task, 45 exiting task, 0 victim task. oom_count=1593
[ 235.977602] MemAlloc-Info: 185 stalling task, 30 dying task, 45 exiting task, 0 victim task. oom_count=1593
[ 262.342177] MemAlloc-Info: 185 stalling task, 30 dying task, 45 exiting task, 0 victim task. oom_count=1593
[ 288.735990] MemAlloc-Info: 185 stalling task, 30 dying task, 45 exiting task, 0 victim task. oom_count=1593
[ 288.741745] MemAlloc: systemd(1) seq=2312 gfp=0x24201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD) order=0 delay=110660 uninterruptible
[ 288.813413] MemAlloc: vmtoolsd(2045) seq=3884 gfp=0x24201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD) order=0 delay=110483 uninterruptible
[ 288.865450] MemAlloc: tuned(3861) seq=3462 gfp=0x24201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD) order=0 delay=110428 uninterruptible
[ 288.916498] MemAlloc: abrt-dbus(3856) seq=849 gfp=0x24201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD) order=0 delay=110428 uninterruptible
[ 288.967496] MemAlloc: a.out(3931) seq=21391 gfp=0x24280ca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO) order=0 delay=110606 uninterruptible
[ 289.010523] MemAlloc: a.out(4100) uninterruptible exiting
[ 289.075164] MemAlloc: a.out(4105) uninterruptible exiting
[ 289.139227] MemAlloc: a.out(4113) uninterruptible exiting
[ 289.204417] MemAlloc: a.out(4114) uninterruptible exiting
[ 289.267492] MemAlloc: a.out(4115) uninterruptible exiting
[ 289.331283] MemAlloc: a.out(4118) uninterruptible dying
[ 289.401583] MemAlloc: a.out(4126) uninterruptible exiting
[ 289.463611] MemAlloc: a.out(4130) uninterruptible exiting
[ 289.525134] MemAlloc: a.out(4131) uninterruptible dying
[ 289.589972] MemAlloc: a.out(4132) uninterruptible dying
[ 289.656122] MemAlloc: a.out(4134) uninterruptible dying
[ 289.725382] MemAlloc: a.out(4138) uninterruptible exiting
[ 289.768154] MemAlloc: a.out(4139) uninterruptible dying
[ 289.837049] MemAlloc: a.out(4140) uninterruptible exiting
[ 289.900465] MemAlloc: a.out(4142) uninterruptible exiting
[ 289.965786] MemAlloc: a.out(4145) uninterruptible exiting
[ 290.029514] MemAlloc: a.out(4146) uninterruptible exiting
[ 290.092057] MemAlloc: a.out(4147) uninterruptible exiting
[ 290.155917] MemAlloc: a.out(4151) uninterruptible exiting
[ 290.220284] MemAlloc: a.out(4153) uninterruptible dying
[ 290.285904] MemAlloc: a.out(4154) uninterruptible exiting
[ 290.348206] MemAlloc: a.out(4155) uninterruptible dying
[ 290.416041] MemAlloc: a.out(4160) uninterruptible dying
[ 290.486060] MemAlloc: a.out(4162) uninterruptible exiting
[ 290.547328] MemAlloc: a.out(4163) uninterruptible exiting
[ 290.610510] MemAlloc: a.out(4164) uninterruptible exiting
[ 290.673150] MemAlloc: a.out(4165) uninterruptible exiting
[ 290.735334] MemAlloc: a.out(4167) uninterruptible exiting
[ 290.798767] MemAlloc: a.out(4170) uninterruptible exiting
[ 290.861345] MemAlloc: a.out(4171) uninterruptible dying
[ 290.945156] MemAlloc: a.out(4172) uninterruptible exiting
[ 291.016476] MemAlloc: a.out(4173) uninterruptible exiting
[ 291.082861] MemAlloc: a.out(4175) uninterruptible dying
[ 291.153041] MemAlloc: a.out(4176) uninterruptible exiting
[ 291.218528] MemAlloc: a.out(4177) uninterruptible dying
[ 291.286239] MemAlloc: a.out(4178) uninterruptible exiting
[ 291.350194] MemAlloc: a.out(4181) uninterruptible exiting
[ 291.412941] MemAlloc: a.out(4183) uninterruptible exiting
[ 291.478004] MemAlloc: a.out(4185) uninterruptible exiting
[ 291.540680] MemAlloc: a.out(4187) uninterruptible exiting
[ 291.604121] MemAlloc: a.out(4188) uninterruptible exiting
[ 291.666909] MemAlloc: a.out(4194) uninterruptible exiting
[ 291.729987] MemAlloc: a.out(4197) uninterruptible exiting
[ 291.774457] MemAlloc: a.out(4199) uninterruptible dying
[ 291.843302] MemAlloc: a.out(4200) uninterruptible exiting
[ 291.906002] MemAlloc: a.out(4202) uninterruptible exiting
[ 291.979994] MemAlloc: a.out(4203) uninterruptible dying
[ 292.058440] MemAlloc: a.out(4206) uninterruptible exiting
[ 292.126031] MemAlloc: a.out(4209) uninterruptible dying
[ 292.201428] MemAlloc: a.out(4212) uninterruptible dying
[ 292.279546] MemAlloc: a.out(4215) uninterruptible dying
[ 292.353191] MemAlloc: a.out(4219) uninterruptible exiting
[ 292.423648] MemAlloc: a.out(4220) uninterruptible exiting
[ 292.492172] MemAlloc: a.out(4224) uninterruptible dying
[ 292.566053] MemAlloc: a.out(4225) uninterruptible dying
[ 292.638368] MemAlloc: a.out(4226) uninterruptible exiting
[ 292.686426] MemAlloc: a.out(4227) uninterruptible dying
[ 292.758527] MemAlloc: a.out(4230) uninterruptible exiting
[ 292.827481] MemAlloc: a.out(4231) uninterruptible exiting
[ 292.895002] MemAlloc: a.out(4232) uninterruptible dying
[ 292.964999] MemAlloc: a.out(4233) uninterruptible dying
[ 293.031709] MemAlloc: a.out(4234) uninterruptible exiting
[ 293.095453] MemAlloc: a.out(4235) uninterruptible exiting
[ 293.161739] MemAlloc: a.out(4236) uninterruptible dying
[ 293.228098] MemAlloc: a.out(4237) uninterruptible dying
[ 293.294276] MemAlloc: a.out(4239) uninterruptible dying
[ 293.362932] MemAlloc: a.out(4240) uninterruptible dying
[ 293.431146] MemAlloc: a.out(4241) uninterruptible dying
[ 293.497015] MemAlloc: a.out(4242) uninterruptible exiting
[ 293.564474] MemAlloc: a.out(4243) uninterruptible dying
[ 293.630170] MemAlloc: a.out(4244) uninterruptible dying
[ 293.699318] MemAlloc: a.out(4245) uninterruptible exiting
[ 293.746545] MemAlloc: a.out(4246) uninterruptible exiting
[ 293.790346] MemAlloc: a.out(4247) uninterruptible dying
[ 293.860205] MemAlloc: a.out(4248) uninterruptible dying
[ 293.927236] MemAlloc: a.out(4252) seq=109 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110409 uninterruptible
[ 293.987358] MemAlloc: a.out(4253) seq=279 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110406 uninterruptible
[ 294.049077] MemAlloc: a.out(4262) seq=489 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 294.111124] MemAlloc: a.out(4270) seq=164 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110442 uninterruptible
[ 294.172876] MemAlloc: a.out(4278) seq=163 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.235220] MemAlloc: a.out(4280) seq=79 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 294.304311] MemAlloc: a.out(4282) seq=377 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.373025] MemAlloc: a.out(4284) seq=219 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 294.437609] MemAlloc: a.out(4288) seq=163 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.499247] MemAlloc: a.out(4289) seq=128 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.561484] MemAlloc: a.out(4290) seq=239 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.624001] MemAlloc: a.out(4291) seq=260 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110411 uninterruptible
[ 294.686560] MemAlloc: a.out(4293) seq=46 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.747170] MemAlloc: a.out(4295) seq=112 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.807957] MemAlloc: a.out(4301) seq=284 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110405 uninterruptible
[ 294.870383] MemAlloc: a.out(4304) seq=313 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.932033] MemAlloc: a.out(4307) seq=229 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 294.995414] MemAlloc: a.out(4309) seq=423 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 295.057044] MemAlloc: a.out(4310) seq=203 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 295.118153] MemAlloc: a.out(4312) seq=380 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 295.180457] MemAlloc: a.out(4325) seq=625 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 295.242072] MemAlloc: a.out(4331) seq=424 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 295.305434] MemAlloc: a.out(4336) seq=239 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110425 uninterruptible
[ 295.367021] MemAlloc: a.out(4337) seq=145 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110425 uninterruptible
[ 295.429522] MemAlloc: a.out(4348) seq=460 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110407 uninterruptible
[ 295.490002] MemAlloc: a.out(4350) seq=461 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 295.551469] MemAlloc: a.out(4353) seq=381 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 295.613194] MemAlloc: a.out(4356) seq=404 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110404 uninterruptible
[ 295.674882] MemAlloc: a.out(4362) seq=299 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 295.736069] MemAlloc: a.out(4368) seq=249 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110413 uninterruptible
[ 295.798640] MemAlloc: a.out(4374) seq=81 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 295.860131] MemAlloc: a.out(4377) seq=428 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 295.923754] MemAlloc: a.out(4382) seq=309 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 295.985296] MemAlloc: a.out(4387) seq=155 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 296.046956] MemAlloc: a.out(4394) seq=506 gfp=0x2400240(GFP_NOFS|__GFP_NOWARN) order=0 delay=110533 uninterruptible
[ 296.131126] MemAlloc: a.out(4401) seq=46 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 296.192056] MemAlloc: a.out(4408) seq=372 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 296.255125] MemAlloc: a.out(4409) seq=129 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110460 uninterruptible
[ 296.316520] MemAlloc: a.out(4411) seq=200 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110446 uninterruptible
[ 296.379106] MemAlloc: a.out(4417) seq=241 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 296.440885] MemAlloc: a.out(4418) seq=459 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110407 uninterruptible
[ 296.502042] MemAlloc: a.out(4419) seq=229 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 296.564261] MemAlloc: a.out(4422) seq=524 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 296.624935] MemAlloc: a.out(4424) seq=109 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 296.686239] MemAlloc: a.out(4425) seq=257 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 296.747145] MemAlloc: a.out(4430) seq=292 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 296.810571] MemAlloc: a.out(4431) seq=428 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 296.871294] MemAlloc: a.out(4435) seq=75 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 296.931995] MemAlloc: a.out(4438) seq=122 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110408 uninterruptible
[ 296.993223] MemAlloc: a.out(4443) seq=126 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 297.054425] MemAlloc: a.out(4445) seq=355 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 297.114872] MemAlloc: a.out(4446) seq=352 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 297.174954] MemAlloc: a.out(4454) seq=150 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110404 uninterruptible
[ 297.235558] MemAlloc: a.out(4455) seq=248 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 297.295382] MemAlloc: a.out(4458) seq=180 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 297.357177] MemAlloc: a.out(4466) seq=523 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 297.417235] MemAlloc: a.out(4472) seq=481 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110483 uninterruptible
[ 297.476913] MemAlloc: a.out(4480) seq=313 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 297.536924] MemAlloc: a.out(4487) seq=198 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 297.598015] MemAlloc: a.out(4490) seq=269 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 297.658632] MemAlloc: a.out(4494) seq=157 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110424 uninterruptible
[ 297.719331] MemAlloc: a.out(4509) seq=105 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 297.780123] MemAlloc: a.out(4514) seq=357 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 297.841232] MemAlloc: a.out(4515) seq=306 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110409 uninterruptible
[ 297.902488] MemAlloc: a.out(4518) seq=123 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 297.963070] MemAlloc: a.out(4520) seq=377 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 298.025259] MemAlloc: a.out(4521) seq=169 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 298.085972] MemAlloc: a.out(4524) seq=256 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 298.147449] MemAlloc: a.out(4527) seq=53 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110408 uninterruptible
[ 298.210280] MemAlloc: a.out(4532) seq=383 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 298.271354] MemAlloc: a.out(4533) seq=259 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 298.333113] MemAlloc: a.out(4534) seq=368 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 298.394307] MemAlloc: a.out(4539) seq=88 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110410 uninterruptible
[ 298.455551] MemAlloc: a.out(4548) seq=18 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 298.517113] MemAlloc: a.out(4558) seq=224 gfp=0x2400240(GFP_NOFS|__GFP_NOWARN) order=0 delay=110533 uninterruptible
[ 298.602193] MemAlloc: a.out(4561) seq=49 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110412 uninterruptible
[ 298.661078] MemAlloc: a.out(4563) seq=181 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 298.721923] MemAlloc: a.out(4565) seq=269 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 298.781994] MemAlloc: a.out(4570) seq=253 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 298.844759] MemAlloc: a.out(4579) seq=27 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110446 uninterruptible
[ 298.907038] MemAlloc: a.out(4581) seq=342 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110424 uninterruptible
[ 298.967938] MemAlloc: a.out(4582) seq=276 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 299.028939] MemAlloc: a.out(4583) seq=243 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 299.089427] MemAlloc: a.out(4586) seq=253 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 299.151053] MemAlloc: a.out(4587) seq=199 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 299.213203] MemAlloc: a.out(4589) seq=106 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 299.274245] MemAlloc: a.out(4591) seq=88 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 299.337493] MemAlloc: a.out(4594) seq=84 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 299.399904] MemAlloc: a.out(4602) seq=23 gfp=0x2400240(GFP_NOFS|__GFP_NOWARN) order=0 delay=110402 uninterruptible
[ 299.485183] MemAlloc: a.out(4603) seq=516 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 299.546127] MemAlloc: a.out(4618) seq=353 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 299.607553] MemAlloc: a.out(4621) seq=451 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110446 uninterruptible
[ 299.669571] MemAlloc: a.out(4622) seq=34 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 299.731123] MemAlloc: a.out(4624) seq=74 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 299.793604] MemAlloc: a.out(4627) seq=269 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 299.855179] MemAlloc: a.out(4628) seq=306 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 299.916566] MemAlloc: a.out(4634) seq=18 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 299.982394] MemAlloc: a.out(4636) seq=25 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 300.043318] MemAlloc: a.out(4639) seq=27 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110411 uninterruptible
[ 300.104383] MemAlloc: a.out(4648) seq=323 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 300.165360] MemAlloc: a.out(4653) seq=51 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 300.226917] MemAlloc: a.out(4654) seq=167 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110459 uninterruptible
[ 300.289325] MemAlloc: a.out(4658) seq=297 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110459 uninterruptible
[ 300.351222] MemAlloc: a.out(4664) seq=400 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 300.412566] MemAlloc: a.out(4672) seq=250 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110459 uninterruptible
[ 300.475080] MemAlloc: a.out(4676) seq=422 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471
[ 300.535975] MemAlloc: a.out(4680) seq=285 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110404 uninterruptible
[ 300.596286] MemAlloc: a.out(4682) seq=25 gfp=0x2400240(GFP_NOFS|__GFP_NOWARN) order=0 delay=110482 uninterruptible
[ 300.681355] MemAlloc: a.out(4683) seq=271 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110459 uninterruptible
[ 300.741873] MemAlloc: a.out(4684) seq=25 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 300.803500] MemAlloc: a.out(4686) seq=57 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110403 uninterruptible
[ 300.864948] MemAlloc: a.out(4690) seq=256 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110459 uninterruptible
[ 300.927897] MemAlloc: a.out(4694) seq=319 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110411 uninterruptible
[ 300.989497] MemAlloc: a.out(4695) seq=32 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 301.054966] MemAlloc: a.out(4697) seq=34 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 301.121285] MemAlloc: a.out(4699) seq=219 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 301.183026] MemAlloc: a.out(4703) seq=89 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 301.244092] MemAlloc: a.out(4704) seq=273 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 301.306223] MemAlloc: a.out(4711) seq=144 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 301.369722] MemAlloc: a.out(4713) seq=186 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 301.433370] MemAlloc: a.out(4724) seq=269 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110483 uninterruptible
[ 301.495114] MemAlloc: a.out(4727) seq=254 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 301.556989] MemAlloc: a.out(4728) seq=407 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 301.618006] MemAlloc: a.out(4729) seq=356 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 301.681279] MemAlloc: a.out(4731) seq=325 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 301.743394] MemAlloc: a.out(4738) seq=387 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 301.805417] MemAlloc: a.out(4742) seq=244 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 301.866973] MemAlloc: a.out(4744) seq=314 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 301.931133] MemAlloc: a.out(4750) seq=124 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 301.991970] MemAlloc: a.out(4759) seq=40 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 302.053070] MemAlloc: a.out(4760) seq=96 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 302.114027] MemAlloc: a.out(4761) seq=199 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110459 uninterruptible
[ 302.173189] MemAlloc: a.out(4768) seq=363 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110410 uninterruptible
[ 302.233932] MemAlloc: a.out(4769) seq=289 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110427 uninterruptible
[ 302.294374] MemAlloc: a.out(4776) seq=495 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 302.355515] MemAlloc: a.out(4778) seq=192 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110459 uninterruptible
[ 302.417056] MemAlloc: a.out(4786) seq=185 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 302.478107] MemAlloc: a.out(4787) seq=136 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110410 uninterruptible
[ 302.539285] MemAlloc: a.out(4799) seq=271 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 302.601258] MemAlloc: a.out(4805) seq=26 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 302.662153] MemAlloc: a.out(4807) seq=36 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 302.728439] MemAlloc: a.out(4817) seq=22 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 302.790321] MemAlloc: a.out(4818) seq=141 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 302.852027] MemAlloc: a.out(4827) seq=655 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 302.913128] MemAlloc: a.out(4835) seq=330 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 302.974405] MemAlloc: a.out(4838) seq=33 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 303.035197] MemAlloc: a.out(4840) seq=74 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 303.097271] MemAlloc: a.out(4841) seq=304 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 303.158136] MemAlloc: a.out(4844) seq=30 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 303.220542] MemAlloc: a.out(4846) seq=400 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 303.283803] MemAlloc: a.out(4848) seq=74 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 303.345946] MemAlloc: a.out(4850) seq=115 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 303.406958] MemAlloc: a.out(4860) seq=331 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 303.466880] MemAlloc: a.out(4861) seq=416 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 303.528111] MemAlloc: a.out(4874) seq=296 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 303.588938] MemAlloc: a.out(4879) seq=246 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 303.648924] MemAlloc: a.out(4880) seq=604 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 303.710376] MemAlloc: a.out(4886) seq=30 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 303.775284] MemAlloc: a.out(4887) seq=193 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 303.837530] MemAlloc: a.out(4889) seq=31 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 303.903037] MemAlloc: a.out(4897) seq=335 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 303.965102] MemAlloc: a.out(4898) seq=236 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 304.025980] MemAlloc: a.out(4907) seq=211 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110408 uninterruptible
[ 304.088067] MemAlloc: a.out(4908) seq=410 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 304.150072] MemAlloc: a.out(4910) seq=141 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110406 uninterruptible
[ 304.211472] MemAlloc: a.out(4917) seq=139 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 304.273634] MemAlloc: a.out(4918) seq=111 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 304.335226] MemAlloc: a.out(4924) seq=101 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110411 uninterruptible
[ 304.397988] MemAlloc: a.out(4928) seq=272 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 304.459028] MemAlloc: a.out(4932) seq=263 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 304.521187] MemAlloc: a.out(4933) seq=405 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 304.583184] MemAlloc: a.out(4934) seq=173 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110458 uninterruptible
[ 304.644320] MemAlloc: a.out(4936) seq=26 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 304.710213] MemAlloc: a.out(4942) seq=294 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 304.772068] MemAlloc: a.out(4945) seq=27 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 304.837134] MemAlloc: a.out(4947) seq=16 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110471 uninterruptible
[ 304.902075] MemAlloc: a.out(4949) seq=231 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110482 uninterruptible
[ 304.963532] MemAlloc: a.out(4951) seq=288 gfp=0x342004a(GFP_NOFS|__GFP_HIGHMEM|__GFP_HARDWALL|__GFP_MOVABLE|__GFP_WRITE) order=0 delay=110460 uninterruptible
[ 305.024528] MemAlloc: abrt-hook-ccpp(5006) seq=2155 gfp=0x24201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD) order=0 delay=110551 uninterruptible
[ 305.078309] MemAlloc: smbd(5007) seq=1081 gfp=0x24201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD) order=0 delay=110483 uninterruptible
[ 315.206606] MemAlloc-Info: 185 stalling task, 30 dying task, 45 exiting task, 0 victim task. oom_count=1593
---------- console log ----------
--
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: How to handle infinite too_many_isolated() loop (for OOM detection rework v4) ?
2016-02-09 14:49 How to handle infinite too_many_isolated() loop (for OOM detection rework v4) ? Tetsuo Handa
@ 2016-02-11 7:06 ` Tetsuo Handa
2016-02-11 11:45 ` Tetsuo Handa
0 siblings, 1 reply; 4+ messages in thread
From: Tetsuo Handa @ 2016-02-11 7:06 UTC (permalink / raw)
To: mhocko
Cc: rientjes, akpm, torvalds, hannes, mgorman, hillf.zj,
kamezawa.hiroyu, linux-mm
Tetsuo Handa wrote:
> The result is that, we have no TIF_MEMDIE tasks but nobody is calling
> out_of_memory(). That is, OOM livelock without invoking the OOM killer.
> They seem to be waiting at congestion_wait() from too_many_isolated()
> loop called from shrink_inactive_list() because nobody can make forward
> progress. I think we must not wait forever at too_many_isolated() loop.
I used delta patch shown below for confirming that they are actually
waiting at congestion_wait() from too_many_isolated() loop called from
shrink_inactive_list().
---------- delta patch (for linux-next-20160209 + kmallocwd) ----------
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0aeff29..e954ac3 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1400,6 +1400,7 @@ struct memalloc_info {
* bit 0: Will be reported as OOM victim.
* bit 1: Will be reported as dying task.
* bit 2: Will be reported as stalling task.
+ * bit 3: Will be reported as exiting task.
*/
u8 type;
/* Started time in jiffies as of valid == 1. */
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index 745a78c..d804d7e 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -17,6 +17,7 @@
#include <linux/sysctl.h>
#include <linux/utsname.h>
#include <linux/oom.h> /* out_of_memory_count */
+#include <linux/console.h> /* console_trylock()/console_unlock() */
#include <trace/events/sched.h>
/*
@@ -153,10 +154,24 @@ static bool is_stalling_task(const struct task_struct *task,
return time_after_eq(expire, memalloc.start);
}
+static bool wait_console_flushed(unsigned int max_wait)
+{
+ while (1) {
+ if (console_trylock()) {
+ console_unlock();
+ return true;
+ }
+ if (max_wait--)
+ schedule_timeout_interruptible(1);
+ else
+ return false;
+ }
+}
+
/* Check for memory allocation stalls. */
static void check_memalloc_stalling_tasks(unsigned long timeout)
{
- char buf[128];
+ char buf[256];
struct task_struct *g, *p;
unsigned long now;
unsigned long expire;
@@ -205,8 +220,9 @@ static void check_memalloc_stalling_tasks(unsigned long timeout)
preempt_enable();
if (!stalling_tasks)
return;
+ wait_console_flushed(10);
/* Report stalling tasks, dying and victim tasks. */
- pr_warn("MemAlloc-Info: %u stalling task, %u dying task, %u exiting task, %u victim task. oom_count=%u\n",
+ pr_warn("MemAlloc-Info: stalling=%u dying=%u exiting=%u, victim=%u oom_count=%u\n",
stalling_tasks, sigkill_pending, exiting_tasks, memdie_pending, out_of_memory_count);
cond_resched();
preempt_disable();
@@ -240,15 +256,14 @@ static void check_memalloc_stalling_tasks(unsigned long timeout)
* Victim tasks get pending SIGKILL removed before arriving at
* do_exit(). Therefore, print " exiting" instead for " dying".
*/
- pr_warn("MemAlloc: %s(%u)%s%s%s%s%s\n", p->comm, p->pid,
- (type & 4) ? buf : "",
+ pr_warn("MemAlloc: %s(%u) flags=0x%x%s%s%s%s%s\n", p->comm,
+ p->pid, p->flags, (type & 4) ? buf : "",
(p->state & TASK_UNINTERRUPTIBLE) ?
" uninterruptible" : "",
(type & 8) ? " exiting" : "",
(type & 2) ? " dying" : "",
(type & 1) ? " victim" : "");
sched_show_task(p);
- debug_show_held_locks(p);
/*
* Since there could be thousands of tasks to report, we always
* sleep and try to flush printk() buffer after each report, in
@@ -262,7 +277,8 @@ static void check_memalloc_stalling_tasks(unsigned long timeout)
get_task_struct(p);
rcu_read_unlock();
preempt_enable();
- schedule_timeout_interruptible(1);
+ cond_resched();
+ wait_console_flushed(1);
preempt_disable();
rcu_read_lock();
can_cont = pid_alive(g) && pid_alive(p);
@@ -278,6 +294,8 @@ static void check_memalloc_stalling_tasks(unsigned long timeout)
show_mem(0);
/* Show workqueue state. */
show_workqueue_state();
+ /* Show lock information. (SysRq-d) */
+ debug_show_all_locks();
}
#endif /* CONFIG_DETECT_MEMALLOC_STALL_TASK */
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 18b3767..0d94523 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1576,6 +1576,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
int file = is_file_lru(lru);
struct zone *zone = lruvec_zone(lruvec);
struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
+ unsigned char counter = 0;
while (unlikely(too_many_isolated(zone, file, sc))) {
congestion_wait(BLK_RW_ASYNC, HZ/10);
@@ -1583,6 +1584,18 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
/* We are about to die and free our memory. Return now. */
if (fatal_signal_pending(current))
return SWAP_CLUSTER_MAX;
+ if (!++counter) {
+ if (file)
+ printk(KERN_WARNING "zone=%s NR_INACTIVE_FILE=%lu NR_ISOLATED_FILE=%lu\n",
+ zone->name,
+ zone_page_state(zone, NR_INACTIVE_FILE),
+ zone_page_state(zone, NR_ISOLATED_FILE));
+ else
+ printk(KERN_WARNING "zone=%s NR_INACTIVE_ANON=%lu NR_ISOLATED_ANON=%lu\n",
+ zone->name,
+ zone_page_state(zone, NR_INACTIVE_ANON),
+ zone_page_state(zone, NR_ISOLATED_ANON));
+ }
}
lru_add_drain();
---------- delta patch (for linux-next-20160209 + kmallocwd) ----------
Complete log is at http://I-love.SAKURA.ne.jp/tmp/serial-20160211.txt.xz .
---------- console log ----------
[ 101.471027] MemAlloc-Info: stalling=46 dying=2 exiting=0, victim=0 oom_count=182
[ 117.187128] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
[ 121.199151] MemAlloc-Info: stalling=50 dying=2 exiting=0, victim=0 oom_count=182
[ 123.777398] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
[ 141.184386] MemAlloc-Info: stalling=50 dying=2 exiting=0, victim=0 oom_count=182
[ 142.944292] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
[ 161.188356] MemAlloc-Info: stalling=51 dying=2 exiting=0, victim=0 oom_count=182
[ 163.541083] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
[ 181.211690] MemAlloc-Info: stalling=51 dying=2 exiting=0, victim=0 oom_count=182
[ 189.423559] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
[ 201.404914] MemAlloc-Info: stalling=51 dying=2 exiting=0, victim=0 oom_count=182
[ 204.456970] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
[ 213.753982] MemAlloc-Info: stalling=53 dying=2 exiting=0, victim=0 oom_count=182
[ 215.117586] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
---------- console log ----------
The zone which causes this silent hang up is not DMA32 but DMA. Nobody except
kswapd can escape this too_many_isolated() loop because isolated > inactive is
always true. Unless kswapd performs operations for making isolated > inactive
false, we will silently hang up. And I think kswapd did nothing for this zone.
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: How to handle infinite too_many_isolated() loop (for OOM detection rework v4) ?
2016-02-11 7:06 ` Tetsuo Handa
@ 2016-02-11 11:45 ` Tetsuo Handa
2016-02-11 22:59 ` Dave Chinner
0 siblings, 1 reply; 4+ messages in thread
From: Tetsuo Handa @ 2016-02-11 11:45 UTC (permalink / raw)
To: mhocko
Cc: rientjes, akpm, torvalds, hannes, mgorman, hillf.zj,
kamezawa.hiroyu, david, linux-mm
(Adding Dave Chinner in case he has any comment although this problem is not
specific to XFS.)
Tetsuo Handa wrote:
> Tetsuo Handa wrote:
> > The result is that, we have no TIF_MEMDIE tasks but nobody is calling
> > out_of_memory(). That is, OOM livelock without invoking the OOM killer.
> > They seem to be waiting at congestion_wait() from too_many_isolated()
> > loop called from shrink_inactive_list() because nobody can make forward
> > progress. I think we must not wait forever at too_many_isolated() loop.
>
> Complete log is at http://I-love.SAKURA.ne.jp/tmp/serial-20160211.txt.xz .
> ---------- console log ----------
> [ 101.471027] MemAlloc-Info: stalling=46 dying=2 exiting=0, victim=0 oom_count=182
> [ 117.187128] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
> [ 121.199151] MemAlloc-Info: stalling=50 dying=2 exiting=0, victim=0 oom_count=182
> [ 123.777398] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
> [ 141.184386] MemAlloc-Info: stalling=50 dying=2 exiting=0, victim=0 oom_count=182
> [ 142.944292] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
> [ 161.188356] MemAlloc-Info: stalling=51 dying=2 exiting=0, victim=0 oom_count=182
> [ 163.541083] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
> [ 181.211690] MemAlloc-Info: stalling=51 dying=2 exiting=0, victim=0 oom_count=182
> [ 189.423559] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
> [ 201.404914] MemAlloc-Info: stalling=51 dying=2 exiting=0, victim=0 oom_count=182
> [ 204.456970] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
> [ 213.753982] MemAlloc-Info: stalling=53 dying=2 exiting=0, victim=0 oom_count=182
> [ 215.117586] zone=DMA NR_INACTIVE_FILE=4 NR_ISOLATED_FILE=19
> ---------- console log ----------
>
> The zone which causes this silent hang up is not DMA32 but DMA. Nobody except
> kswapd can escape this too_many_isolated() loop because isolated > inactive is
> always true. Unless kswapd performs operations for making isolated > inactive
> false, we will silently hang up. And I think kswapd did nothing for this zone.
>
I used delta patch shown below for confirming that kswapd did nothing for DMA
zone in order to make isolated > inactive false.
---------- delta2 patch (for linux-next-20160209 + kmallocwd + delta) ----------
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index d804d7e..5a7ea78 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -232,7 +232,7 @@ static void check_memalloc_stalling_tasks(unsigned long timeout)
bool can_cont;
u8 type;
- if (likely(!p->memalloc.type))
+ if (likely(!p->memalloc.type && !(p->flags & PF_KSWAPD)))
continue;
p->memalloc.type = 0;
/* Recheck in case state changed meanwhile. */
@@ -250,7 +250,7 @@ static void check_memalloc_stalling_tasks(unsigned long timeout)
memalloc.sequence >> 1, memalloc.gfp, &memalloc.gfp,
memalloc.order, now - memalloc.start);
}
- if (unlikely(!type))
+ if (unlikely(!type && !(p->flags & PF_KSWAPD)))
continue;
/*
* Victim tasks get pending SIGKILL removed before arriving at
---------- delta2 patch (for linux-next-20160209 + kmallocwd + delta) ----------
Complete log is at http://I-love.SAKURA.ne.jp/tmp/serial-20160211-2.txt.xz .
---------- console log ----------
[ 89.960570] MemAlloc-Info: stalling=466 dying=1 exiting=0, victim=0 oom_count=17
[ 90.056315] MemAlloc: kswapd0(47) flags=0xa60840 uninterruptible
[ 90.058146] kswapd0 D ffff88007a2d3188 0 47 2 0x00000000
[ 90.059998] ffff88007a2d3188 ffff880066421640 ffff88007cbf42c0 ffff88007a2d4000
[ 90.061942] ffff88007a9ff4b0 ffff88007cbf42c0 ffff880079dd1600 0000000000000000
[ 90.063820] ffff88007a2d31a0 ffffffff81701fa7 7fffffffffffffff ffff88007a2d3240
[ 90.065843] Call Trace:
[ 90.066803] [<ffffffff81701fa7>] schedule+0x37/0x90
[ 90.068233] [<ffffffff817063e8>] schedule_timeout+0x178/0x1c0
[ 90.070040] [<ffffffff813b2259>] ? find_next_bit+0x19/0x20
[ 90.071635] [<ffffffff8139d88f>] ? cpumask_next_and+0x2f/0x40
[ 90.073223] [<ffffffff81705258>] __down+0x7c/0xc3
[ 90.074629] [<ffffffff81706b63>] ? _raw_spin_lock_irqsave+0x53/0x60
[ 90.076230] [<ffffffff810ba36c>] down+0x3c/0x50
[ 90.077624] [<ffffffff812b21f1>] xfs_buf_lock+0x21/0x50
[ 90.079058] [<ffffffff812b23cf>] _xfs_buf_find+0x1af/0x2c0
[ 90.080637] [<ffffffff812b2505>] xfs_buf_get_map+0x25/0x150
[ 90.082131] [<ffffffff812b2ac9>] xfs_buf_read_map+0x29/0xd0
[ 90.083602] [<ffffffff812dce27>] xfs_trans_read_buf_map+0x97/0x1a0
[ 90.085267] [<ffffffff8127a945>] xfs_read_agf+0x75/0xb0
[ 90.086776] [<ffffffff8127a9a4>] xfs_alloc_read_agf+0x24/0xd0
[ 90.088217] [<ffffffff8127ad75>] xfs_alloc_fix_freelist+0x325/0x3e0
[ 90.089796] [<ffffffff813a398a>] ? __radix_tree_lookup+0xda/0x140
[ 90.091335] [<ffffffff8127b02e>] xfs_alloc_vextent+0x19e/0x480
[ 90.092922] [<ffffffff81288caf>] xfs_bmap_btalloc+0x3bf/0x710
[ 90.094437] [<ffffffff81289009>] xfs_bmap_alloc+0x9/0x10
[ 90.096775] [<ffffffff812899fa>] xfs_bmapi_write+0x47a/0xa10
[ 90.098328] [<ffffffff812bee97>] xfs_iomap_write_allocate+0x167/0x370
[ 90.100013] [<ffffffff812abf3a>] xfs_map_blocks+0x15a/0x170
[ 90.101466] [<ffffffff812acf57>] xfs_vm_writepage+0x187/0x5c0
[ 90.103025] [<ffffffff81153a7f>] pageout.isra.43+0x18f/0x250
[ 90.104570] [<ffffffff8115548e>] shrink_page_list+0x82e/0xb10
[ 90.106057] [<ffffffff81155ed7>] shrink_inactive_list+0x207/0x550
[ 90.107531] [<ffffffff81156bd6>] shrink_zone_memcg+0x5b6/0x780
[ 90.109004] [<ffffffff81156e72>] shrink_zone+0xd2/0x2f0
[ 90.110318] [<ffffffff81157dbc>] kswapd+0x4cc/0x920
[ 90.111561] [<ffffffff811578f0>] ? mem_cgroup_shrink_node_zone+0xb0/0xb0
[ 90.113229] [<ffffffff81090989>] kthread+0xf9/0x110
[ 90.114502] [<ffffffff81707672>] ret_from_fork+0x22/0x50
[ 90.115900] [<ffffffff81090890>] ? kthread_create_on_node+0x230/0x230
[ 105.775213] zone=DMA NR_INACTIVE_FILE=6 NR_ISOLATED_FILE=32
[ 129.472341] MemAlloc-Info: stalling=474 dying=1 exiting=0, victim=0 oom_count=17
---------- console log ----------
Although there are memory allocating tasks passing gfp flags with
__GFP_KSWAPD_RECLAIM, kswapd is unable to make forward progress because
it is blocked at down() called from memory reclaim path. And since it is
legal to block kswapd from memory reclaim path (am I correct?), I think
we must not assume that current_is_kswapd() check will break the infinite
loop condition.
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: How to handle infinite too_many_isolated() loop (for OOM detection rework v4) ?
2016-02-11 11:45 ` Tetsuo Handa
@ 2016-02-11 22:59 ` Dave Chinner
0 siblings, 0 replies; 4+ messages in thread
From: Dave Chinner @ 2016-02-11 22:59 UTC (permalink / raw)
To: Tetsuo Handa
Cc: mhocko, rientjes, akpm, torvalds, hannes, mgorman, hillf.zj,
kamezawa.hiroyu, linux-mm
On Thu, Feb 11, 2016 at 08:45:10PM +0900, Tetsuo Handa wrote:
> (Adding Dave Chinner in case he has any comment although this problem is not
> specific to XFS.)
....
> Complete log is at http://I-love.SAKURA.ne.jp/tmp/serial-20160211-2.txt.xz .
> ---------- console log ----------
> [ 89.960570] MemAlloc-Info: stalling=466 dying=1 exiting=0, victim=0 oom_count=17
> [ 90.056315] MemAlloc: kswapd0(47) flags=0xa60840 uninterruptible
> [ 90.058146] kswapd0 D ffff88007a2d3188 0 47 2 0x00000000
> [ 90.059998] ffff88007a2d3188 ffff880066421640 ffff88007cbf42c0 ffff88007a2d4000
> [ 90.061942] ffff88007a9ff4b0 ffff88007cbf42c0 ffff880079dd1600 0000000000000000
> [ 90.063820] ffff88007a2d31a0 ffffffff81701fa7 7fffffffffffffff ffff88007a2d3240
> [ 90.065843] Call Trace:
> [ 90.066803] [<ffffffff81701fa7>] schedule+0x37/0x90
> [ 90.068233] [<ffffffff817063e8>] schedule_timeout+0x178/0x1c0
> [ 90.070040] [<ffffffff813b2259>] ? find_next_bit+0x19/0x20
> [ 90.071635] [<ffffffff8139d88f>] ? cpumask_next_and+0x2f/0x40
> [ 90.073223] [<ffffffff81705258>] __down+0x7c/0xc3
> [ 90.074629] [<ffffffff81706b63>] ? _raw_spin_lock_irqsave+0x53/0x60
> [ 90.076230] [<ffffffff810ba36c>] down+0x3c/0x50
> [ 90.077624] [<ffffffff812b21f1>] xfs_buf_lock+0x21/0x50
> [ 90.079058] [<ffffffff812b23cf>] _xfs_buf_find+0x1af/0x2c0
> [ 90.080637] [<ffffffff812b2505>] xfs_buf_get_map+0x25/0x150
> [ 90.082131] [<ffffffff812b2ac9>] xfs_buf_read_map+0x29/0xd0
> [ 90.083602] [<ffffffff812dce27>] xfs_trans_read_buf_map+0x97/0x1a0
> [ 90.085267] [<ffffffff8127a945>] xfs_read_agf+0x75/0xb0
> [ 90.086776] [<ffffffff8127a9a4>] xfs_alloc_read_agf+0x24/0xd0
> [ 90.088217] [<ffffffff8127ad75>] xfs_alloc_fix_freelist+0x325/0x3e0
> [ 90.089796] [<ffffffff813a398a>] ? __radix_tree_lookup+0xda/0x140
> [ 90.091335] [<ffffffff8127b02e>] xfs_alloc_vextent+0x19e/0x480
> [ 90.092922] [<ffffffff81288caf>] xfs_bmap_btalloc+0x3bf/0x710
> [ 90.094437] [<ffffffff81289009>] xfs_bmap_alloc+0x9/0x10
> [ 90.096775] [<ffffffff812899fa>] xfs_bmapi_write+0x47a/0xa10
> [ 90.098328] [<ffffffff812bee97>] xfs_iomap_write_allocate+0x167/0x370
> [ 90.100013] [<ffffffff812abf3a>] xfs_map_blocks+0x15a/0x170
> [ 90.101466] [<ffffffff812acf57>] xfs_vm_writepage+0x187/0x5c0
> [ 90.103025] [<ffffffff81153a7f>] pageout.isra.43+0x18f/0x250
> [ 90.104570] [<ffffffff8115548e>] shrink_page_list+0x82e/0xb10
> [ 90.106057] [<ffffffff81155ed7>] shrink_inactive_list+0x207/0x550
> [ 90.107531] [<ffffffff81156bd6>] shrink_zone_memcg+0x5b6/0x780
> [ 90.109004] [<ffffffff81156e72>] shrink_zone+0xd2/0x2f0
> [ 90.110318] [<ffffffff81157dbc>] kswapd+0x4cc/0x920
> [ 90.111561] [<ffffffff811578f0>] ? mem_cgroup_shrink_node_zone+0xb0/0xb0
> [ 90.113229] [<ffffffff81090989>] kthread+0xf9/0x110
> [ 90.114502] [<ffffffff81707672>] ret_from_fork+0x22/0x50
> [ 90.115900] [<ffffffff81090890>] ? kthread_create_on_node+0x230/0x230
> [ 105.775213] zone=DMA NR_INACTIVE_FILE=6 NR_ISOLATED_FILE=32
> [ 129.472341] MemAlloc-Info: stalling=474 dying=1 exiting=0, victim=0 oom_count=17
> ---------- console log ----------
So the problem here is that dirty page writeback is being done by
kswapd. We all know that dirty page writeback can (and does) block
on filesystem locks, and as such it can get blocked on locks held by
other threads that are already blocked waiting for memory reclaim
whilst holding those filesystem locks (i.e. in GFP_NOFS allocation).
> Although there are memory allocating tasks passing gfp flags with
> __GFP_KSWAPD_RECLAIM, kswapd is unable to make forward progress because
> it is blocked at down() called from memory reclaim path. And since it is
> legal to block kswapd from memory reclaim path (am I correct?), I think
> we must not assume that current_is_kswapd() check will break the infinite
> loop condition.
Right, the threads that are blocked in writeback waiting on memory
reclaim will be using GFP_NOFS to prevent recursion deadlocks, but
that does not avoid the problem that kswapd can then get stuck
on those locks, too. Hence there is no guarantee that kswapd can
make reclaim progress if it does dirty page writeback...
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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2016-02-09 14:49 How to handle infinite too_many_isolated() loop (for OOM detection rework v4) ? Tetsuo Handa
2016-02-11 7:06 ` Tetsuo Handa
2016-02-11 11:45 ` Tetsuo Handa
2016-02-11 22:59 ` Dave Chinner
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