New: kswapd block the whole system by IO blaster in some case

Bugme-new Andrew Morton 4 participants 4 messages Feb 27, 2009 1 message not in the archive Memory management

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Andrew Morton

author maintainer

2009-02-27 05:29 UTC #1 lore raw

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Quoted 34 lines · On Thu, 26 Feb 2009 21:20:46 -0800 (PST) [email protected] wrote:

http://bugzilla.kernel.org/show_bug.cgi?id=12785
Summary: kswapd block the whole system by IO blaster in some case
Product: Memory Management
Version: 2.5
KernelVersion: 2.6.28.4
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: low
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Distribution:debian lenny with some experimental packages Hardware Environment:ThinkPad SL 400 7DC with 2G memery
Software Environment:no swap partition,kernel with 4G memery support Problem Description:
Some day, my box dived into a block while HDLED was blinking.
I switched to console from gdm, tried iotop by long waiting and found the killer was kswapd.
In "top" output, free memory is almost 50M.The most memory is cached by swap. The system blocked even shutdown command wasn't effective.The box had been killed by pressing then power button.
BTW, there was no network available then, so there was no attack possibility.
I'd like to attach my kernel config file, but I don't know how to.For someone interesting, we may transfer the file my [email protected]
ps:these experimental packages installed

Quoted 15 lines

libdrm2_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-dev_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-intel1_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-nouveau1_2.4.4+git+20090205+8b88036-1_i386.deb libgl1-mesa-dev_7.3-1_all.deb libgl1-mesa-dri_7.3-1_i386.deb libgl1-mesa-glx_7.3-1_i386.deb libglu1-mesa_7.3-1_i386.deb mesa-common-dev_7.3-1_all.deb mesa-utils_7.3-1_i386.deb xserver-common_2%3a1.5.99.902-1_all.deb xserver-xorg-core_2%3a1.5.99.902-1_i386.deb xkb-data_1.5-2_all.deb

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KOSAKI Motohiro

2009-02-27 05:48 UTC #2 lore raw

Quoted 26 lines

(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).
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Quoted 18 lines · On Thu, 26 Feb 2009 21:20:46 -0800 (PST) [email protected] wrote:
http://bugzilla.kernel.org/show_bug.cgi?id=12785
Summary: kswapd block the whole system by IO blaster in some case
Product: Memory Management
Version: 2.5
KernelVersion: 2.6.28.4
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: low
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Distribution:debian lenny with some experimental packages

As far as I know, lenny (debian 5.0) use kernel 2.6.26. then, recently changed code don't provide any hint.

Martin, if remove experimental package, do you still see the same issue?

Quoted 16 lines

Quoted 16 lines
Hardware Environment:ThinkPad SL 400 7DC with 2G memery
Software Environment:no swap partition,kernel with 4G memery support Problem Description:
Some day, my box dived into a block while HDLED was blinking.
I switched to console from gdm, tried iotop by long waiting and found the killer was kswapd.
In "top" output, free memory is almost 50M.The most memory is cached by swap. The system blocked even shutdown command wasn't effective.The box had been killed by pressing then power button.
BTW, there was no network available then, so there was no attack possibility.
I'd like to attach my kernel config file, but I don't know how to.For someone interesting, we may transfer the file my [email protected]
ps:these experimental packages installed

Quoted 16 lines

Quoted 5 lines
libdrm2_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-dev_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-intel1_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-nouveau1_2.4.4+git+20090205+8b88036-1_i386.deb libgl1-mesa-dev_7.3-1_all.deb
Quoted 10 lines
libgl1-mesa-dri_7.3-1_i386.deb
libgl1-mesa-glx_7.3-1_i386.deb
libglu1-mesa_7.3-1_i386.deb
mesa-common-dev_7.3-1_all.deb
mesa-utils_7.3-1_i386.deb
xserver-common_2%3a1.5.99.902-1_all.deb
xserver-xorg-core_2%3a1.5.99.902-1_i386.deb
xkb-data_1.5-2_all.deb

陈世昊

2009-02-27 06:00 UTC #3 lore raw

Those experimental packages have been in use for 2 months, this issue just occured and just once.
I think it's quite unexpectly random. Even in the same environment, I can't make that issue alive again.

Today I'll look through the logs. Maybe in the syslog I can find something valuable while other logs like dmesg, messages, kern.log, etc have been found useless.

Quoted 70 lines · KOSAKI Motohiro

Quoted 26 lines
(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).
(uh-oh)
Quoted 18 lines · On Thu, 26 Feb 2009 21:20:46 -0800 (PST) [email protected] wrote:
http://bugzilla.kernel.org/show_bug.cgi?id=12785
Summary: kswapd block the whole system by IO blaster in some case
Product: Memory Management
Version: 2.5
KernelVersion: 2.6.28.4
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: low
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Distribution:debian lenny with some experimental packages
As far as I know, lenny (debian 5.0) use kernel 2.6.26. then, recently changed code don't provide any hint.
Martin, if remove experimental package, do you still see the same issue?
Quoted 32 lines
Quoted 31 lines
Hardware Environment:ThinkPad SL 400 7DC with 2G memery
Software Environment:no swap partition,kernel with 4G memery support Problem Description:
Some day, my box dived into a block while HDLED was blinking.
I switched to console from gdm, tried iotop by long waiting and found the killer was kswapd.
In "top" output, free memory is almost 50M.The most memory is cached by swap. The system blocked even shutdown command wasn't effective.The box had been killed by pressing then power button.
BTW, there was no network available then, so there was no attack possibility.
I'd like to attach my kernel config file, but I don't know how to.For someone interesting, we may transfer the file my [email protected]
ps:these experimental packages installed
libdrm2_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-dev_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-intel1_2.4.4+git+20090205+8b88036-1_i386.deb libdrm-nouveau1_2.4.4+git+20090205+8b88036-1_i386.deb libgl1-mesa-dev_7.3-1_all.deb libgl1-mesa-dri_7.3-1_i386.deb libgl1-mesa-glx_7.3-1_i386.deb libglu1-mesa_7.3-1_i386.deb mesa-common-dev_7.3-1_all.deb mesa-utils_7.3-1_i386.deb xserver-common_2%3a1.5.99.902-1_all.deb xserver-xorg-core_2%3a1.5.99.902-1_i386.deb xkb-data_1.5-2_all.deb

Signature · 7 lines

陈世昊

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KAMEZAWA Hiroyuki

2009-02-27 06:10 UTC #4 lore raw

In reply to Andrew Morton

Quoted 35 lines · On Thu, 26 Feb 2009 21:29:18 -0800 Andrew Morton <[email protected]>…

(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).
(uh-oh)
Quoted 27 lines · On Thu, 26 Feb 2009 21:20:46 -0800 (PST) [email protected] wrote:
http://bugzilla.kernel.org/show_bug.cgi?id=12785
Summary: kswapd block the whole system by IO blaster in some case
Product: Memory Management
Version: 2.5
KernelVersion: 2.6.28.4
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: low
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Distribution:debian lenny with some experimental packages Hardware Environment:ThinkPad SL 400 7DC with 2G memery
Software Environment:no swap partition,kernel with 4G memery support Problem Description:
Some day, my box dived into a block while HDLED was blinking.
I switched to console from gdm, tried iotop by long waiting and found the killer was kswapd.
In "top" output, free memory is almost 50M.The most memory is cached by swap. The system blocked even shutdown command wasn't effective.The box had been killed by pressing then power button.

BTW, pages can be SwapCache even when there are no swap partition ?

Thanks,
-Kame