From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: "M. Vefa Bicakci" <bicave@superonline.com>
Cc: kosaki.motohiro@jp.fujitsu.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernation to hang
Date: Wed, 25 Aug 2010 09:48:05 +0900 (JST) [thread overview]
Message-ID: <20100824094152.F3B0.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <4C7214DD.30500@superonline.com>
> Hello,
>
> On 23/08/10 03:22 AM, KOSAKI Motohiro wrote:
> >
> > sorry, my last mail has some mistake.
> >
>
> No problem. I did the tests again according to your new instructions,
> and I am appending the results.
Great!
> > 1. Please let me know your machine & test script
> >
>
> % ./your-fills-up-the-tmpfs-script (i.e. run your script)
>
> > % cat /proc/meminfo
>
> MemTotal: 3104484 kB
> MemFree: 1258780 kB
Hm, free memory is enough lots.
> Buffers: 30820 kB
> Cached: 1693836 kB
> SwapCached: 0 kB
> Active: 1670344 kB
> Inactive: 137960 kB
> Active(anon): 1633940 kB
> Inactive(anon): 26224 kB
> Active(file): 36404 kB
> Inactive(file): 111736 kB
> Unevictable: 32 kB
> Mlocked: 32 kB
> HighTotal: 2226632 kB
> HighFree: 437684 kB
You are using 32 bit system.
> LowTotal: 877852 kB
> LowFree: 821096 kB
low memory is empty!
> SwapTotal: 1999540 kB
> SwapFree: 1999540 kB
> Dirty: 28 kB
> Writeback: 0 kB
> AnonPages: 83676 kB
> Mapped: 44220 kB
> Shmem: 1576520 kB
tmpfs files are using about 1.5GB memory.
(because tmpfs is limited totalmem/2 by default)
> Slab: 17136 kB
> SReclaimable: 9480 kB
> SUnreclaim: 7656 kB
> KernelStack: 1832 kB
> PageTables: 2440 kB
> NFS_Unstable: 0 kB
> Bounce: 0 kB
> WritebackTmp: 0 kB
> CommitLimit: 3551780 kB
> Committed_AS: 1892636 kB
> VmallocTotal: 122880 kB
> VmallocUsed: 16308 kB
> VmallocChunk: 92764 kB
> HugePages_Total: 0
> HugePages_Free: 0
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 4096 kB
> DirectMap4k: 24568 kB
> DirectMap4M: 884736 kB
> > % cat /proc/zoneinfo
>
> Node 0, zone DMA
> recent_anon_rotated: 0
> recent_anon_scanned: 0
> recent_file_rotated: 0
> recent_file_scanned: 0
> anon_ratio: 30
> Node 0, zone Normal
> recent_anon_rotated: 0
> recent_anon_scanned: 0
> recent_file_rotated: 272
> recent_file_scanned: 1385
> anon_ratio: 7
> Node 0, zone HighMem
> recent_anon_rotated: 1259857
> recent_anon_scanned: 2522124
> recent_file_rotated: 1269
> recent_file_scanned: 5591
> anon_ratio: 16
anon/file reclaim scanning ratio is NOT strange.
>
> > % df
>
> Filesystem 1K-blocks Used Available Use% Mounted on
> /dev/sda15 10317828 7309436 2484276 75% /
> tmpfs 1552240 8 1552232 1% /lib/init/rw
> udev 1549148 220 1548928 1% /dev
> tmpfs 1552240 4 1552236 1% /dev/shm
> tmpfs 1552240 1552240 0 100% /tmp
Seems typical one drive system. no strange.
> > % cat your-fills-up-the-tmpfs-script
>
> #!/bin/bash
>
> rm -vf /tmp/tmp
> dd if=/dev/zero of=/tmp/tmp bs=1024k count=1600
> shred -vn1 /tmp/tmp
>
> exit 0 ### removed when testing hibernation
>
> read -p "Press enter to hibernate..."
>
> echo -n reboot > /sys/power/disk
> echo -n disk > /sys/power/state
>
> echo "Exit code: $?"
>
> rm -vf /tmp/tmp
Almostly same with my test program ;)
> > # echo 1 > /proc/sys/vm/shrink_all_memory
>
> > # tail /var/log/messages
>
> [ 439.165652] shrink_all_memory start
> [ 439.165960] shrink_all_memory: req:1 reclaimed:32 free:313765
>
My code doesn't makes hang!
Hmm... Hmm...
To be honest, I have no idea why your hang was happen.
1) zone normal is not used. your system don't need additional reclaim
at all.
2) reclaim logic seems to doesn't makes hang.
Can you please try following additional test?
# echo 8 > /proc/sysrq-trigger
# echo disk > /sys/power/state
next prev parent reply other threads:[~2010-08-25 0:48 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-15 5:25 [Bisected Regression in 2.6.35] A full tmpfs filesystem causes hibernationto hang M. Vefa Bicakci
2010-08-17 2:37 ` KOSAKI Motohiro
2010-08-22 11:06 ` KOSAKI Motohiro
2010-08-22 16:28 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernation to hang M. Vefa Bicakci
2010-08-25 8:55 ` KOSAKI Motohiro
2010-08-25 10:11 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernationto hang M. Vefa Bicakci
2010-08-25 17:31 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernation to hang Rafael J. Wysocki
2010-08-23 0:22 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causes hibernationto hang KOSAKI Motohiro
2010-08-23 6:27 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernation to hang M. Vefa Bicakci
2010-08-25 0:48 ` KOSAKI Motohiro [this message]
2010-08-25 8:39 ` KOSAKI Motohiro
2010-08-25 10:10 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernationto hang M. Vefa Bicakci
[not found] ` <4C74EB70.3080406@superonline.com>
[not found] ` <20100826134506.F676.A69D9226@jp.fujitsu.com>
2010-08-26 10:36 ` M. Vefa Bicakci
2010-08-30 2:28 ` KOSAKI Motohiro
2010-08-30 16:54 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernation to hang M. Vefa Bicakci
2010-08-31 6:35 ` KOSAKI Motohiro
2010-08-31 6:54 ` KOSAKI Motohiro
2010-08-31 11:25 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernationto hang M. Vefa Bicakci
2010-09-01 0:48 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernation to hang KOSAKI Motohiro
2010-09-01 22:02 ` Rafael J. Wysocki
2010-09-01 22:02 ` Rafael J. Wysocki
2010-09-02 0:31 ` KOSAKI Motohiro
2010-09-02 0:31 ` KOSAKI Motohiro
2010-09-02 19:57 ` Rafael J. Wysocki
2010-09-02 19:57 ` Rafael J. Wysocki
2010-09-02 20:24 ` Rafael J. Wysocki
2010-09-02 20:24 ` Rafael J. Wysocki
2010-09-03 0:13 ` KOSAKI Motohiro
2010-09-03 0:13 ` KOSAKI Motohiro
2010-09-03 1:07 ` Rafael J. Wysocki
2010-09-03 1:07 ` Rafael J. Wysocki
2010-09-03 1:53 ` KOSAKI Motohiro
2010-09-04 1:44 ` Rafael J. Wysocki
2010-09-04 1:44 ` Rafael J. Wysocki
2010-09-06 2:08 ` KOSAKI Motohiro
2010-09-06 11:27 ` Important news regarding the two different patches M. Vefa Bicakci
2010-09-06 18:43 ` Rafael J. Wysocki
2010-09-06 18:43 ` Rafael J. Wysocki
2010-09-07 1:34 ` M. Vefa Bicakci
2010-09-07 1:34 ` M. Vefa Bicakci
2010-09-07 1:58 ` KOSAKI Motohiro
2010-09-07 21:44 ` Rafael J. Wysocki
2010-09-07 21:44 ` Rafael J. Wysocki
2010-09-08 12:56 ` M. Vefa Bicakci
2010-09-08 21:34 ` [PATCH] PM / Hibernate: Avoid hitting OOM during preallocation of memory (was: Re: Important news ...) Rafael J. Wysocki
2010-09-11 18:12 ` PATCH: PM / Hibernate: Avoid hitting OOM during preallocationof memory M. Vefa Bicakci
2010-09-11 18:12 ` M. Vefa Bicakci
2010-09-11 19:06 ` Rafael J. Wysocki
2010-09-11 19:06 ` Rafael J. Wysocki
2010-09-11 22:27 ` [PATCH] PM / Hibernate: Make default image size depend on total RAM size (was: Re: PATCH: PM / Hibernate: Avoid hitting OOM ...) Rafael J. Wysocki
2010-09-13 15:40 ` [PATCH] PM / Hibernate: Make default image size depend on totalRAM size M. Vefa Bicakci
2010-09-13 15:40 ` M. Vefa Bicakci
2010-09-13 17:52 ` Rafael J. Wysocki
2010-09-13 17:52 ` Rafael J. Wysocki
2010-09-11 22:27 ` [PATCH] PM / Hibernate: Make default image size depend on total RAM size (was: Re: PATCH: PM / Hibernate: Avoid hitting OOM ...) Rafael J. Wysocki
2010-09-08 21:34 ` [PATCH] PM / Hibernate: Avoid hitting OOM during preallocation of memory (was: Re: Important news ...) Rafael J. Wysocki
2010-09-08 12:56 ` Important news regarding the two different patches M. Vefa Bicakci
2010-09-07 1:58 ` KOSAKI Motohiro
2010-09-06 11:27 ` M. Vefa Bicakci
2010-09-06 18:46 ` [Bisected Regression in 2.6.35] A full tmpfs filesystem causeshibernation to hang Rafael J. Wysocki
2010-09-06 19:54 ` Rafael J. Wysocki
2010-09-06 19:54 ` Rafael J. Wysocki
2010-09-06 18:46 ` Rafael J. Wysocki
2010-09-06 2:08 ` KOSAKI Motohiro
2010-09-03 1:53 ` KOSAKI Motohiro
2010-09-01 0:48 ` KOSAKI Motohiro
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