+ sched-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch added to -mm tree

+ sched-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch added to -mm tree

[akpm]

The patch titled
     Subject: sched: use %*pb[l] to print bitmaps including cpumasks and nodemasks
has been added to the -mm tree.  Its filename is
     sched-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/sched-use-%25pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/sched-use-%25pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch

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*** Remember to use Documentation/SubmitChecklist when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Tejun Heo <tj@kernel.org>
Subject: sched: use %*pb[l] to print bitmaps including cpumasks and nodemasks

printk and friends can now formap bitmaps using '%*pb[l]'.  cpumask
and nodemask also provide cpumask_pr_args() and nodemask_pr_args()
respectively which can be used to generate the two printf arguments
necessary to format the specified cpu/nodemask.

This patch is dependent on the following two patches.

 lib/vsprintf: implement bitmap printing through '%*pb[l]'
 cpumask, nodemask: implement cpumask/nodemask_pr_args()

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/sched/core.c  |   10 ++++------
 kernel/sched/stats.c |   11 ++---------
 2 files changed, 6 insertions(+), 15 deletions(-)

diff -puN kernel/sched/core.c~sched-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks kernel/sched/core.c
--- a/kernel/sched/core.c~sched-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks
+++ a/kernel/sched/core.c
@@ -5408,9 +5408,7 @@ static int sched_domain_debug_one(struct
 				  struct cpumask *groupmask)
 {
 	struct sched_group *group = sd->groups;
-	char str[256];
 
-	cpulist_scnprintf(str, sizeof(str), sched_domain_span(sd));
 	cpumask_clear(groupmask);
 
 	printk(KERN_DEBUG "%*s domain %d: ", level, "", level);
@@ -5423,7 +5421,8 @@ static int sched_domain_debug_one(struct
 		return -1;
 	}
 
-	printk(KERN_CONT "span %s level %s\n", str, sd->name);
+	printk(KERN_CONT "span %*pbl level %s\n",
+	       cpumask_pr_args(sched_domain_span(sd)), sd->name);
 
 	if (!cpumask_test_cpu(cpu, sched_domain_span(sd))) {
 		printk(KERN_ERR "ERROR: domain->span does not contain "
@@ -5468,9 +5467,8 @@ static int sched_domain_debug_one(struct
 
 		cpumask_or(groupmask, groupmask, sched_group_cpus(group));
 
-		cpulist_scnprintf(str, sizeof(str), sched_group_cpus(group));
-
-		printk(KERN_CONT " %s", str);
+		printk(KERN_CONT " %*pbl",
+		       cpumask_pr_args(sched_group_cpus(group)));
 		if (group->sgc->capacity != SCHED_CAPACITY_SCALE) {
 			printk(KERN_CONT " (cpu_capacity = %d)",
 				group->sgc->capacity);
diff -puN kernel/sched/stats.c~sched-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks kernel/sched/stats.c
--- a/kernel/sched/stats.c~sched-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks
+++ a/kernel/sched/stats.c
@@ -15,11 +15,6 @@
 static int show_schedstat(struct seq_file *seq, void *v)
 {
 	int cpu;
-	int mask_len = DIV_ROUND_UP(NR_CPUS, 32) * 9;
-	char *mask_str = kmalloc(mask_len, GFP_KERNEL);
-
-	if (mask_str == NULL)
-		return -ENOMEM;
 
 	if (v == (void *)1) {
 		seq_printf(seq, "version %d\n", SCHEDSTAT_VERSION);
@@ -50,9 +45,8 @@ static int show_schedstat(struct seq_fil
 		for_each_domain(cpu, sd) {
 			enum cpu_idle_type itype;
 
-			cpumask_scnprintf(mask_str, mask_len,
-					  sched_domain_span(sd));
-			seq_printf(seq, "domain%d %s", dcount++, mask_str);
+			seq_printf(seq, "domain%d %*pb", dcount++,
+				   cpumask_pr_args(sched_domain_span(sd)));
 			for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES;
 					itype++) {
 				seq_printf(seq, " %u %u %u %u %u %u %u %u",
@@ -76,7 +70,6 @@ static int show_schedstat(struct seq_fil
 		rcu_read_unlock();
 #endif
 	}
-	kfree(mask_str);
 	return 0;
 }
 
_

Patches currently in -mm which might be from tj@kernel.org are

block-restore-proc-partitions-to-not-display-non-partitionable-removable-devices.patch
list_lru-introduce-list_lru_shrink_countwalk.patch
fs-consolidate-nrfree_cached_objects-args-in-shrink_control.patch
vmscan-per-memory-cgroup-slab-shrinkers.patch
memcg-rename-some-cache-id-related-variables.patch
memcg-add-rwsem-to-synchronize-against-memcg_caches-arrays-relocation.patch
list_lru-get-rid-of-active_nodes.patch
list_lru-organize-all-list_lrus-to-list.patch
list_lru-introduce-per-memcg-lists.patch
fs-make-shrinker-memcg-aware.patch
vmscan-force-scan-offline-memory-cgroups.patch
vmscan-force-scan-offline-memory-cgroups-fix.patch
oom-add-helpers-for-setting-and-clearing-tif_memdie.patch
oom-thaw-the-oom-victim-if-it-is-frozen.patch
pm-convert-printk-to-pr_-equivalent.patch
sysrq-convert-printk-to-pr_-equivalent.patch
oom-pm-make-oom-detection-in-the-freezer-path-raceless.patch
slab-embed-memcg_cache_params-to-kmem_cache.patch
slab-link-memcg-caches-of-the-same-kind-into-a-list.patch
cgroup-release-css-id-after-css_free.patch
slab-use-css-id-for-naming-per-memcg-caches.patch
memcg-free-memcg_caches-slot-on-css-offline.patch
list_lru-add-helpers-to-isolate-items.patch
memcg-reparent-list_lrus-and-free-kmemcg_id-on-css-offline.patch
fs-mpagec-forgotten-write_sync-in-case-of-data-integrity-write.patch
mm-util-add-kstrdup_const.patch
kernfs-convert-node-name-allocation-to-kstrdup_const.patch
kernfs-remove-kernfs_static_name.patch
clk-convert-clock-name-allocations-to-kstrdup_const.patch
mm-slab-convert-cache-name-allocations-to-kstrdup_const.patch
mm-slab-convert-cache-name-allocations-to-kstrdup_const-fix.patch
fs-namespace-convert-devname-allocation-to-kstrdup_const.patch
cpumask-always-use-nr_cpu_ids-in-formatting-and-parsing-functions.patch
lib-vsprintf-implement-bitmap-printing-through-%pb.patch
cpumask-nodemask-implement-cpumask-nodemask_pr_args.patch
bitmap-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
mips-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
powerpc-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
tile-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
x86-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
ia64-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
xtensa-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
arm-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
cpuset-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
rcu-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
sched-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
time-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
percpu-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
workqueue-use-%pb-to-format-bitmaps-including-cpumasks-and-nodemasks.patch
tracing-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
net-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
wireless-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
input-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
scsi-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
usb-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
drivers-base-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
slub-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
mm-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
padata-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
proc-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
irq-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
profile-use-%pb-to-print-bitmaps-including-cpumasks-and-nodemasks.patch
bitmap-cpumask-nodemask-remove-dedicated-formatting-functions.patch
linux-next.patch