* [PATCH][RFC v4] PM / Hibernate: Feed the wathdog when creating snapshot
@ 2017-08-19 10:21 Chen Yu
2017-08-21 6:47 ` Michal Hocko
0 siblings, 1 reply; 5+ messages in thread
From: Chen Yu @ 2017-08-19 10:21 UTC (permalink / raw)
To: linux-mm
Cc: Chen Yu, Andrew Morton, Michal Hocko, Mel Gorman,
Vlastimil Babka, Rafael J. Wysocki, Len Brown, Dan Williams,
linux-kernel
There is a problem that when counting the pages for creating
the hibernation snapshot will take significant amount of
time, especially on system with large memory. Since the counting
job is performed with irq disabled, this might lead to NMI lockup.
The following warning were found on a system with 1.5TB DRAM:
[ 1124.758184] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 1124.768721] OOM killer disabled.
[ 1124.847009] PM: Preallocating image memory...
[ 1139.392042] NMI watchdog: Watchdog detected hard LOCKUP on cpu 27
[ 1139.392076] CPU: 27 PID: 3128 Comm: systemd-sleep Not tainted 4.13.0-0.rc2.git0.1.fc27.x86_64 #1
[ 1139.392077] task: ffff9f01971ac000 task.stack: ffffb1a3f325c000
[ 1139.392083] RIP: 0010:memory_bm_find_bit+0xf4/0x100
[ 1139.392084] RSP: 0018:ffffb1a3f325fc20 EFLAGS: 00000006
[ 1139.392084] RAX: 0000000000000000 RBX: 0000000013b83000 RCX: ffff9fbe89caf000
[ 1139.392085] RDX: ffffb1a3f325fc30 RSI: 0000000000003200 RDI: ffff9fbeaffffe80
[ 1139.392085] RBP: ffffb1a3f325fc40 R08: 0000000013b80000 R09: ffff9fbe89c54878
[ 1139.392085] R10: ffffb1a3f325fc2c R11: 0000000013b83200 R12: 0000000000000400
[ 1139.392086] R13: fffffd552e0c0000 R14: ffff9fc1bffd31e0 R15: 0000000000000202
[ 1139.392086] FS: 00007f3189704180(0000) GS:ffff9fbec8ec0000(0000) knlGS:0000000000000000
[ 1139.392087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1139.392087] CR2: 00000085da0f7398 CR3: 000001771cf9a000 CR4: 00000000007406e0
[ 1139.392088] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1139.392088] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1139.392088] PKRU: 55555554
[ 1139.392089] Call Trace:
[ 1139.392092] ? memory_bm_set_bit+0x29/0x60
[ 1139.392094] swsusp_set_page_free+0x2b/0x30
[ 1139.392098] mark_free_pages+0x147/0x1c0
[ 1139.392099] count_data_pages+0x41/0xa0
[ 1139.392101] hibernate_preallocate_memory+0x80/0x450
[ 1139.392102] hibernation_snapshot+0x58/0x410
[ 1139.392103] hibernate+0x17c/0x310
[ 1139.392104] state_store+0xdf/0xf0
[ 1139.392107] kobj_attr_store+0xf/0x20
[ 1139.392111] sysfs_kf_write+0x37/0x40
[ 1139.392113] kernfs_fop_write+0x11c/0x1a0
[ 1139.392117] __vfs_write+0x37/0x170
[ 1139.392121] ? handle_mm_fault+0xd8/0x230
[ 1139.392122] vfs_write+0xb1/0x1a0
[ 1139.392123] SyS_write+0x55/0xc0
[ 1139.392126] entry_SYSCALL_64_fastpath+0x1a/0xa5
...
[ 1144.690405] done (allocated 6590003 pages)
[ 1144.694971] PM: Allocated 26360012 kbytes in 19.89 seconds (1325.28 MB/s)
It has taken nearly 20 seconds(2.10GHz CPU) thus the NMI lockup
was triggered. In case the timeout of the NMI watch dog has been
set to 1 second, a safe interval should be 6590003/20 = 320k pages
in theory. However there might also be some platforms running at a
lower frequency, so feed the watchdog every 100k pages.
Reported-by: Jan Filipcewicz <jan.filipcewicz@intel.com>
Suggested-by: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
---
mm/page_alloc.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6d00f74..543726a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -66,6 +66,7 @@
#include <linux/kthread.h>
#include <linux/memcontrol.h>
#include <linux/ftrace.h>
+#include <linux/nmi.h>
#include <asm/sections.h>
#include <asm/tlbflush.h>
@@ -2531,9 +2532,12 @@ void drain_all_pages(struct zone *zone)
#ifdef CONFIG_HIBERNATION
+/* Touch watchdog for every WD_INTERVAL_PAGE pages. */
+#define WD_INTERVAL_PAGE (100*1024)
+
void mark_free_pages(struct zone *zone)
{
- unsigned long pfn, max_zone_pfn;
+ unsigned long pfn, max_zone_pfn, page_num = 0;
unsigned long flags;
unsigned int order, t;
struct page *page;
@@ -2548,6 +2552,9 @@ void mark_free_pages(struct zone *zone)
if (pfn_valid(pfn)) {
page = pfn_to_page(pfn);
+ if (!((page_num++) % WD_INTERVAL_PAGE))
+ touch_nmi_watchdog();
+
if (page_zone(page) != zone)
continue;
@@ -2561,8 +2568,11 @@ void mark_free_pages(struct zone *zone)
unsigned long i;
pfn = page_to_pfn(page);
- for (i = 0; i < (1UL << order); i++)
+ for (i = 0; i < (1UL << order); i++) {
+ if (!((page_num++) % WD_INTERVAL_PAGE))
+ touch_nmi_watchdog();
swsusp_set_page_free(pfn_to_page(pfn + i));
+ }
}
}
spin_unlock_irqrestore(&zone->lock, flags);
--
2.7.4
--
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^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH][RFC v4] PM / Hibernate: Feed the wathdog when creating snapshot
2017-08-19 10:21 [PATCH][RFC v4] PM / Hibernate: Feed the wathdog when creating snapshot Chen Yu
@ 2017-08-21 6:47 ` Michal Hocko
2017-08-21 7:48 ` Chen Yu
0 siblings, 1 reply; 5+ messages in thread
From: Michal Hocko @ 2017-08-21 6:47 UTC (permalink / raw)
To: Chen Yu
Cc: linux-mm, Andrew Morton, Mel Gorman, Vlastimil Babka,
Rafael J. Wysocki, Len Brown, Dan Williams, linux-kernel
On Sat 19-08-17 18:21:26, Chen Yu wrote:
> There is a problem that when counting the pages for creating
> the hibernation snapshot will take significant amount of
> time, especially on system with large memory. Since the counting
> job is performed with irq disabled, this might lead to NMI lockup.
> The following warning were found on a system with 1.5TB DRAM:
>
> [ 1124.758184] Freezing user space processes ... (elapsed 0.002 seconds) done.
> [ 1124.768721] OOM killer disabled.
> [ 1124.847009] PM: Preallocating image memory...
> [ 1139.392042] NMI watchdog: Watchdog detected hard LOCKUP on cpu 27
> [ 1139.392076] CPU: 27 PID: 3128 Comm: systemd-sleep Not tainted 4.13.0-0.rc2.git0.1.fc27.x86_64 #1
> [ 1139.392077] task: ffff9f01971ac000 task.stack: ffffb1a3f325c000
> [ 1139.392083] RIP: 0010:memory_bm_find_bit+0xf4/0x100
> [ 1139.392084] RSP: 0018:ffffb1a3f325fc20 EFLAGS: 00000006
> [ 1139.392084] RAX: 0000000000000000 RBX: 0000000013b83000 RCX: ffff9fbe89caf000
> [ 1139.392085] RDX: ffffb1a3f325fc30 RSI: 0000000000003200 RDI: ffff9fbeaffffe80
> [ 1139.392085] RBP: ffffb1a3f325fc40 R08: 0000000013b80000 R09: ffff9fbe89c54878
> [ 1139.392085] R10: ffffb1a3f325fc2c R11: 0000000013b83200 R12: 0000000000000400
> [ 1139.392086] R13: fffffd552e0c0000 R14: ffff9fc1bffd31e0 R15: 0000000000000202
> [ 1139.392086] FS: 00007f3189704180(0000) GS:ffff9fbec8ec0000(0000) knlGS:0000000000000000
> [ 1139.392087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 1139.392087] CR2: 00000085da0f7398 CR3: 000001771cf9a000 CR4: 00000000007406e0
> [ 1139.392088] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 1139.392088] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [ 1139.392088] PKRU: 55555554
> [ 1139.392089] Call Trace:
> [ 1139.392092] ? memory_bm_set_bit+0x29/0x60
> [ 1139.392094] swsusp_set_page_free+0x2b/0x30
> [ 1139.392098] mark_free_pages+0x147/0x1c0
> [ 1139.392099] count_data_pages+0x41/0xa0
> [ 1139.392101] hibernate_preallocate_memory+0x80/0x450
> [ 1139.392102] hibernation_snapshot+0x58/0x410
> [ 1139.392103] hibernate+0x17c/0x310
> [ 1139.392104] state_store+0xdf/0xf0
> [ 1139.392107] kobj_attr_store+0xf/0x20
> [ 1139.392111] sysfs_kf_write+0x37/0x40
> [ 1139.392113] kernfs_fop_write+0x11c/0x1a0
> [ 1139.392117] __vfs_write+0x37/0x170
> [ 1139.392121] ? handle_mm_fault+0xd8/0x230
> [ 1139.392122] vfs_write+0xb1/0x1a0
> [ 1139.392123] SyS_write+0x55/0xc0
> [ 1139.392126] entry_SYSCALL_64_fastpath+0x1a/0xa5
> ...
> [ 1144.690405] done (allocated 6590003 pages)
> [ 1144.694971] PM: Allocated 26360012 kbytes in 19.89 seconds (1325.28 MB/s)
>
> It has taken nearly 20 seconds(2.10GHz CPU) thus the NMI lockup
> was triggered. In case the timeout of the NMI watch dog has been
> set to 1 second, a safe interval should be 6590003/20 = 320k pages
> in theory. However there might also be some platforms running at a
> lower frequency, so feed the watchdog every 100k pages.
>
> Reported-by: Jan Filipcewicz <jan.filipcewicz@intel.com>
> Suggested-by: Michal Hocko <mhocko@kernel.org>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Michal Hocko <mhocko@kernel.org>
> Cc: Mel Gorman <mgorman@techsingularity.net>
> Cc: Vlastimil Babka <vbabka@suse.cz>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> Cc: Len Brown <lenb@kernel.org>
> Cc: Dan Williams <dan.j.williams@intel.com>
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Chen Yu <yu.c.chen@intel.com>
OK, this looks better. Feel free to add
Reviewed-by: Michal Hocko <mhocko@suse.com>
> ---
> mm/page_alloc.c | 14 ++++++++++++--
> 1 file changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 6d00f74..543726a 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -66,6 +66,7 @@
> #include <linux/kthread.h>
> #include <linux/memcontrol.h>
> #include <linux/ftrace.h>
> +#include <linux/nmi.h>
>
> #include <asm/sections.h>
> #include <asm/tlbflush.h>
> @@ -2531,9 +2532,12 @@ void drain_all_pages(struct zone *zone)
>
> #ifdef CONFIG_HIBERNATION
>
> +/* Touch watchdog for every WD_INTERVAL_PAGE pages. */
> +#define WD_INTERVAL_PAGE (100*1024)
> +
> void mark_free_pages(struct zone *zone)
> {
> - unsigned long pfn, max_zone_pfn;
> + unsigned long pfn, max_zone_pfn, page_num = 0;
> unsigned long flags;
> unsigned int order, t;
> struct page *page;
> @@ -2548,6 +2552,9 @@ void mark_free_pages(struct zone *zone)
> if (pfn_valid(pfn)) {
> page = pfn_to_page(pfn);
>
> + if (!((page_num++) % WD_INTERVAL_PAGE))
> + touch_nmi_watchdog();
> +
> if (page_zone(page) != zone)
> continue;
>
> @@ -2561,8 +2568,11 @@ void mark_free_pages(struct zone *zone)
> unsigned long i;
>
> pfn = page_to_pfn(page);
> - for (i = 0; i < (1UL << order); i++)
> + for (i = 0; i < (1UL << order); i++) {
> + if (!((page_num++) % WD_INTERVAL_PAGE))
> + touch_nmi_watchdog();
> swsusp_set_page_free(pfn_to_page(pfn + i));
> + }
> }
> }
> spin_unlock_irqrestore(&zone->lock, flags);
> --
> 2.7.4
>
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@kvack.org. For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
--
Michal Hocko
SUSE Labs
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH][RFC v4] PM / Hibernate: Feed the wathdog when creating snapshot
2017-08-21 6:47 ` Michal Hocko
@ 2017-08-21 7:48 ` Chen Yu
2017-08-21 12:36 ` Rafael J. Wysocki
0 siblings, 1 reply; 5+ messages in thread
From: Chen Yu @ 2017-08-21 7:48 UTC (permalink / raw)
To: Michal Hocko
Cc: linux-mm, Andrew Morton, Mel Gorman, Vlastimil Babka,
Rafael J. Wysocki, Len Brown, Dan Williams, linux-kernel
On Mon, Aug 21, 2017 at 08:47:09AM +0200, Michal Hocko wrote:
> On Sat 19-08-17 18:21:26, Chen Yu wrote:
> > There is a problem that when counting the pages for creating
> > the hibernation snapshot will take significant amount of
> > time, especially on system with large memory. Since the counting
> > job is performed with irq disabled, this might lead to NMI lockup.
> > The following warning were found on a system with 1.5TB DRAM:
> >
> > [ 1124.758184] Freezing user space processes ... (elapsed 0.002 seconds) done.
> > [ 1124.768721] OOM killer disabled.
> > [ 1124.847009] PM: Preallocating image memory...
> > [ 1139.392042] NMI watchdog: Watchdog detected hard LOCKUP on cpu 27
> > [ 1139.392076] CPU: 27 PID: 3128 Comm: systemd-sleep Not tainted 4.13.0-0.rc2.git0.1.fc27.x86_64 #1
> > [ 1139.392077] task: ffff9f01971ac000 task.stack: ffffb1a3f325c000
> > [ 1139.392083] RIP: 0010:memory_bm_find_bit+0xf4/0x100
> > [ 1139.392084] RSP: 0018:ffffb1a3f325fc20 EFLAGS: 00000006
> > [ 1139.392084] RAX: 0000000000000000 RBX: 0000000013b83000 RCX: ffff9fbe89caf000
> > [ 1139.392085] RDX: ffffb1a3f325fc30 RSI: 0000000000003200 RDI: ffff9fbeaffffe80
> > [ 1139.392085] RBP: ffffb1a3f325fc40 R08: 0000000013b80000 R09: ffff9fbe89c54878
> > [ 1139.392085] R10: ffffb1a3f325fc2c R11: 0000000013b83200 R12: 0000000000000400
> > [ 1139.392086] R13: fffffd552e0c0000 R14: ffff9fc1bffd31e0 R15: 0000000000000202
> > [ 1139.392086] FS: 00007f3189704180(0000) GS:ffff9fbec8ec0000(0000) knlGS:0000000000000000
> > [ 1139.392087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 1139.392087] CR2: 00000085da0f7398 CR3: 000001771cf9a000 CR4: 00000000007406e0
> > [ 1139.392088] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > [ 1139.392088] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > [ 1139.392088] PKRU: 55555554
> > [ 1139.392089] Call Trace:
> > [ 1139.392092] ? memory_bm_set_bit+0x29/0x60
> > [ 1139.392094] swsusp_set_page_free+0x2b/0x30
> > [ 1139.392098] mark_free_pages+0x147/0x1c0
> > [ 1139.392099] count_data_pages+0x41/0xa0
> > [ 1139.392101] hibernate_preallocate_memory+0x80/0x450
> > [ 1139.392102] hibernation_snapshot+0x58/0x410
> > [ 1139.392103] hibernate+0x17c/0x310
> > [ 1139.392104] state_store+0xdf/0xf0
> > [ 1139.392107] kobj_attr_store+0xf/0x20
> > [ 1139.392111] sysfs_kf_write+0x37/0x40
> > [ 1139.392113] kernfs_fop_write+0x11c/0x1a0
> > [ 1139.392117] __vfs_write+0x37/0x170
> > [ 1139.392121] ? handle_mm_fault+0xd8/0x230
> > [ 1139.392122] vfs_write+0xb1/0x1a0
> > [ 1139.392123] SyS_write+0x55/0xc0
> > [ 1139.392126] entry_SYSCALL_64_fastpath+0x1a/0xa5
> > ...
> > [ 1144.690405] done (allocated 6590003 pages)
> > [ 1144.694971] PM: Allocated 26360012 kbytes in 19.89 seconds (1325.28 MB/s)
> >
> > It has taken nearly 20 seconds(2.10GHz CPU) thus the NMI lockup
> > was triggered. In case the timeout of the NMI watch dog has been
> > set to 1 second, a safe interval should be 6590003/20 = 320k pages
> > in theory. However there might also be some platforms running at a
> > lower frequency, so feed the watchdog every 100k pages.
> >
> > Reported-by: Jan Filipcewicz <jan.filipcewicz@intel.com>
> > Suggested-by: Michal Hocko <mhocko@kernel.org>
> > Cc: Andrew Morton <akpm@linux-foundation.org>
> > Cc: Michal Hocko <mhocko@kernel.org>
> > Cc: Mel Gorman <mgorman@techsingularity.net>
> > Cc: Vlastimil Babka <vbabka@suse.cz>
> > Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> > Cc: Len Brown <lenb@kernel.org>
> > Cc: Dan Williams <dan.j.williams@intel.com>
> > Cc: linux-kernel@vger.kernel.org
> > Signed-off-by: Chen Yu <yu.c.chen@intel.com>
>
> OK, this looks better. Feel free to add
> Reviewed-by: Michal Hocko <mhocko@suse.com>
>
Thanks!
Yu
> > ---
> > mm/page_alloc.c | 14 ++++++++++++--
> > 1 file changed, 12 insertions(+), 2 deletions(-)
> >
> > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> > index 6d00f74..543726a 100644
> > --- a/mm/page_alloc.c
> > +++ b/mm/page_alloc.c
> > @@ -66,6 +66,7 @@
> > #include <linux/kthread.h>
> > #include <linux/memcontrol.h>
> > #include <linux/ftrace.h>
> > +#include <linux/nmi.h>
> >
> > #include <asm/sections.h>
> > #include <asm/tlbflush.h>
> > @@ -2531,9 +2532,12 @@ void drain_all_pages(struct zone *zone)
> >
> > #ifdef CONFIG_HIBERNATION
> >
> > +/* Touch watchdog for every WD_INTERVAL_PAGE pages. */
> > +#define WD_INTERVAL_PAGE (100*1024)
> > +
> > void mark_free_pages(struct zone *zone)
> > {
> > - unsigned long pfn, max_zone_pfn;
> > + unsigned long pfn, max_zone_pfn, page_num = 0;
> > unsigned long flags;
> > unsigned int order, t;
> > struct page *page;
> > @@ -2548,6 +2552,9 @@ void mark_free_pages(struct zone *zone)
> > if (pfn_valid(pfn)) {
> > page = pfn_to_page(pfn);
> >
> > + if (!((page_num++) % WD_INTERVAL_PAGE))
> > + touch_nmi_watchdog();
> > +
> > if (page_zone(page) != zone)
> > continue;
> >
> > @@ -2561,8 +2568,11 @@ void mark_free_pages(struct zone *zone)
> > unsigned long i;
> >
> > pfn = page_to_pfn(page);
> > - for (i = 0; i < (1UL << order); i++)
> > + for (i = 0; i < (1UL << order); i++) {
> > + if (!((page_num++) % WD_INTERVAL_PAGE))
> > + touch_nmi_watchdog();
> > swsusp_set_page_free(pfn_to_page(pfn + i));
> > + }
> > }
> > }
> > spin_unlock_irqrestore(&zone->lock, flags);
> > --
> > 2.7.4
> >
> > --
> > To unsubscribe, send a message with 'unsubscribe linux-mm' in
> > the body to majordomo@kvack.org. For more info on Linux MM,
> > see: http://www.linux-mm.org/ .
> > Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
>
> --
> Michal Hocko
> SUSE Labs
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH][RFC v4] PM / Hibernate: Feed the wathdog when creating snapshot
2017-08-21 7:48 ` Chen Yu
@ 2017-08-21 12:36 ` Rafael J. Wysocki
2017-08-21 14:46 ` Chen Yu
0 siblings, 1 reply; 5+ messages in thread
From: Rafael J. Wysocki @ 2017-08-21 12:36 UTC (permalink / raw)
To: Chen Yu
Cc: Michal Hocko, linux-mm, Andrew Morton, Mel Gorman,
Vlastimil Babka, Len Brown, Dan Williams, linux-kernel
On Monday, August 21, 2017 9:48:17 AM CEST Chen Yu wrote:
> On Mon, Aug 21, 2017 at 08:47:09AM +0200, Michal Hocko wrote:
> > On Sat 19-08-17 18:21:26, Chen Yu wrote:
> > > There is a problem that when counting the pages for creating
> > > the hibernation snapshot will take significant amount of
> > > time, especially on system with large memory. Since the counting
> > > job is performed with irq disabled, this might lead to NMI lockup.
> > > The following warning were found on a system with 1.5TB DRAM:
> > >
> > > [ 1124.758184] Freezing user space processes ... (elapsed 0.002 seconds) done.
> > > [ 1124.768721] OOM killer disabled.
> > > [ 1124.847009] PM: Preallocating image memory...
> > > [ 1139.392042] NMI watchdog: Watchdog detected hard LOCKUP on cpu 27
> > > [ 1139.392076] CPU: 27 PID: 3128 Comm: systemd-sleep Not tainted 4.13.0-0.rc2.git0.1.fc27.x86_64 #1
> > > [ 1139.392077] task: ffff9f01971ac000 task.stack: ffffb1a3f325c000
> > > [ 1139.392083] RIP: 0010:memory_bm_find_bit+0xf4/0x100
> > > [ 1139.392084] RSP: 0018:ffffb1a3f325fc20 EFLAGS: 00000006
> > > [ 1139.392084] RAX: 0000000000000000 RBX: 0000000013b83000 RCX: ffff9fbe89caf000
> > > [ 1139.392085] RDX: ffffb1a3f325fc30 RSI: 0000000000003200 RDI: ffff9fbeaffffe80
> > > [ 1139.392085] RBP: ffffb1a3f325fc40 R08: 0000000013b80000 R09: ffff9fbe89c54878
> > > [ 1139.392085] R10: ffffb1a3f325fc2c R11: 0000000013b83200 R12: 0000000000000400
> > > [ 1139.392086] R13: fffffd552e0c0000 R14: ffff9fc1bffd31e0 R15: 0000000000000202
> > > [ 1139.392086] FS: 00007f3189704180(0000) GS:ffff9fbec8ec0000(0000) knlGS:0000000000000000
> > > [ 1139.392087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > [ 1139.392087] CR2: 00000085da0f7398 CR3: 000001771cf9a000 CR4: 00000000007406e0
> > > [ 1139.392088] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > > [ 1139.392088] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > > [ 1139.392088] PKRU: 55555554
> > > [ 1139.392089] Call Trace:
> > > [ 1139.392092] ? memory_bm_set_bit+0x29/0x60
> > > [ 1139.392094] swsusp_set_page_free+0x2b/0x30
> > > [ 1139.392098] mark_free_pages+0x147/0x1c0
> > > [ 1139.392099] count_data_pages+0x41/0xa0
> > > [ 1139.392101] hibernate_preallocate_memory+0x80/0x450
> > > [ 1139.392102] hibernation_snapshot+0x58/0x410
> > > [ 1139.392103] hibernate+0x17c/0x310
> > > [ 1139.392104] state_store+0xdf/0xf0
> > > [ 1139.392107] kobj_attr_store+0xf/0x20
> > > [ 1139.392111] sysfs_kf_write+0x37/0x40
> > > [ 1139.392113] kernfs_fop_write+0x11c/0x1a0
> > > [ 1139.392117] __vfs_write+0x37/0x170
> > > [ 1139.392121] ? handle_mm_fault+0xd8/0x230
> > > [ 1139.392122] vfs_write+0xb1/0x1a0
> > > [ 1139.392123] SyS_write+0x55/0xc0
> > > [ 1139.392126] entry_SYSCALL_64_fastpath+0x1a/0xa5
> > > ...
> > > [ 1144.690405] done (allocated 6590003 pages)
> > > [ 1144.694971] PM: Allocated 26360012 kbytes in 19.89 seconds (1325.28 MB/s)
> > >
> > > It has taken nearly 20 seconds(2.10GHz CPU) thus the NMI lockup
> > > was triggered. In case the timeout of the NMI watch dog has been
> > > set to 1 second, a safe interval should be 6590003/20 = 320k pages
> > > in theory. However there might also be some platforms running at a
> > > lower frequency, so feed the watchdog every 100k pages.
> > >
> > > Reported-by: Jan Filipcewicz <jan.filipcewicz@intel.com>
> > > Suggested-by: Michal Hocko <mhocko@kernel.org>
> > > Cc: Andrew Morton <akpm@linux-foundation.org>
> > > Cc: Michal Hocko <mhocko@kernel.org>
> > > Cc: Mel Gorman <mgorman@techsingularity.net>
> > > Cc: Vlastimil Babka <vbabka@suse.cz>
> > > Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> > > Cc: Len Brown <lenb@kernel.org>
> > > Cc: Dan Williams <dan.j.williams@intel.com>
> > > Cc: linux-kernel@vger.kernel.org
> > > Signed-off-by: Chen Yu <yu.c.chen@intel.com>
> >
> > OK, this looks better. Feel free to add
> > Reviewed-by: Michal Hocko <mhocko@suse.com>
> >
> Thanks!
OK, so can you please resend the patch with a CC to linux-pm and
the Reviewed-by from Michal?
Thanks,
Rafael
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH][RFC v4] PM / Hibernate: Feed the wathdog when creating snapshot
2017-08-21 12:36 ` Rafael J. Wysocki
@ 2017-08-21 14:46 ` Chen Yu
0 siblings, 0 replies; 5+ messages in thread
From: Chen Yu @ 2017-08-21 14:46 UTC (permalink / raw)
To: Rafael J. Wysocki
Cc: Michal Hocko, linux-mm, Andrew Morton, Mel Gorman,
Vlastimil Babka, Len Brown, Dan Williams, linux-kernel
On Mon, Aug 21, 2017 at 02:36:40PM +0200, Rafael J. Wysocki wrote:
> On Monday, August 21, 2017 9:48:17 AM CEST Chen Yu wrote:
> > On Mon, Aug 21, 2017 at 08:47:09AM +0200, Michal Hocko wrote:
> > > On Sat 19-08-17 18:21:26, Chen Yu wrote:
> > > > There is a problem that when counting the pages for creating
> > > > the hibernation snapshot will take significant amount of
> > > > time, especially on system with large memory. Since the counting
> > > > job is performed with irq disabled, this might lead to NMI lockup.
> > > > The following warning were found on a system with 1.5TB DRAM:
> > > >
> > > > [ 1124.758184] Freezing user space processes ... (elapsed 0.002 seconds) done.
> > > > [ 1124.768721] OOM killer disabled.
> > > > [ 1124.847009] PM: Preallocating image memory...
> > > > [ 1139.392042] NMI watchdog: Watchdog detected hard LOCKUP on cpu 27
> > > > [ 1139.392076] CPU: 27 PID: 3128 Comm: systemd-sleep Not tainted 4.13.0-0.rc2.git0.1.fc27.x86_64 #1
> > > > [ 1139.392077] task: ffff9f01971ac000 task.stack: ffffb1a3f325c000
> > > > [ 1139.392083] RIP: 0010:memory_bm_find_bit+0xf4/0x100
> > > > [ 1139.392084] RSP: 0018:ffffb1a3f325fc20 EFLAGS: 00000006
> > > > [ 1139.392084] RAX: 0000000000000000 RBX: 0000000013b83000 RCX: ffff9fbe89caf000
> > > > [ 1139.392085] RDX: ffffb1a3f325fc30 RSI: 0000000000003200 RDI: ffff9fbeaffffe80
> > > > [ 1139.392085] RBP: ffffb1a3f325fc40 R08: 0000000013b80000 R09: ffff9fbe89c54878
> > > > [ 1139.392085] R10: ffffb1a3f325fc2c R11: 0000000013b83200 R12: 0000000000000400
> > > > [ 1139.392086] R13: fffffd552e0c0000 R14: ffff9fc1bffd31e0 R15: 0000000000000202
> > > > [ 1139.392086] FS: 00007f3189704180(0000) GS:ffff9fbec8ec0000(0000) knlGS:0000000000000000
> > > > [ 1139.392087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > > [ 1139.392087] CR2: 00000085da0f7398 CR3: 000001771cf9a000 CR4: 00000000007406e0
> > > > [ 1139.392088] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > > > [ 1139.392088] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > > > [ 1139.392088] PKRU: 55555554
> > > > [ 1139.392089] Call Trace:
> > > > [ 1139.392092] ? memory_bm_set_bit+0x29/0x60
> > > > [ 1139.392094] swsusp_set_page_free+0x2b/0x30
> > > > [ 1139.392098] mark_free_pages+0x147/0x1c0
> > > > [ 1139.392099] count_data_pages+0x41/0xa0
> > > > [ 1139.392101] hibernate_preallocate_memory+0x80/0x450
> > > > [ 1139.392102] hibernation_snapshot+0x58/0x410
> > > > [ 1139.392103] hibernate+0x17c/0x310
> > > > [ 1139.392104] state_store+0xdf/0xf0
> > > > [ 1139.392107] kobj_attr_store+0xf/0x20
> > > > [ 1139.392111] sysfs_kf_write+0x37/0x40
> > > > [ 1139.392113] kernfs_fop_write+0x11c/0x1a0
> > > > [ 1139.392117] __vfs_write+0x37/0x170
> > > > [ 1139.392121] ? handle_mm_fault+0xd8/0x230
> > > > [ 1139.392122] vfs_write+0xb1/0x1a0
> > > > [ 1139.392123] SyS_write+0x55/0xc0
> > > > [ 1139.392126] entry_SYSCALL_64_fastpath+0x1a/0xa5
> > > > ...
> > > > [ 1144.690405] done (allocated 6590003 pages)
> > > > [ 1144.694971] PM: Allocated 26360012 kbytes in 19.89 seconds (1325.28 MB/s)
> > > >
> > > > It has taken nearly 20 seconds(2.10GHz CPU) thus the NMI lockup
> > > > was triggered. In case the timeout of the NMI watch dog has been
> > > > set to 1 second, a safe interval should be 6590003/20 = 320k pages
> > > > in theory. However there might also be some platforms running at a
> > > > lower frequency, so feed the watchdog every 100k pages.
> > > >
> > > > Reported-by: Jan Filipcewicz <jan.filipcewicz@intel.com>
> > > > Suggested-by: Michal Hocko <mhocko@kernel.org>
> > > > Cc: Andrew Morton <akpm@linux-foundation.org>
> > > > Cc: Michal Hocko <mhocko@kernel.org>
> > > > Cc: Mel Gorman <mgorman@techsingularity.net>
> > > > Cc: Vlastimil Babka <vbabka@suse.cz>
> > > > Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> > > > Cc: Len Brown <lenb@kernel.org>
> > > > Cc: Dan Williams <dan.j.williams@intel.com>
> > > > Cc: linux-kernel@vger.kernel.org
> > > > Signed-off-by: Chen Yu <yu.c.chen@intel.com>
> > >
> > > OK, this looks better. Feel free to add
> > > Reviewed-by: Michal Hocko <mhocko@suse.com>
> > >
> > Thanks!
>
> OK, so can you please resend the patch with a CC to linux-pm and
> the Reviewed-by from Michal?
>
OK, will do.
Thanks,
Yu
> Thanks,
> Rafael
>
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2017-08-21 14:44 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-08-19 10:21 [PATCH][RFC v4] PM / Hibernate: Feed the wathdog when creating snapshot Chen Yu
2017-08-21 6:47 ` Michal Hocko
2017-08-21 7:48 ` Chen Yu
2017-08-21 12:36 ` Rafael J. Wysocki
2017-08-21 14:46 ` Chen Yu
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