Re: [patch] CFS scheduler, -v19

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To: Ingo Molnar <mingo@...>

Cc: Linux Kernel Mailing List <linux-kernel@...>, Linus Torvalds <torvalds@...>, Andrew Morton <akpm@...>, Mike Galbraith <efault@...>, Arjan van de Ven <arjan@...>, Thomas Gleixner <tglx@...>, Dmitry Adamushko <dmitry.adamushko@...>, Srivatsa Vaddagiri <vatsa@...>

Subject: Re: [patch] CFS scheduler, -v19

Date: Monday, July 16, 2007 - 1:59 pm

> > [...] The mouse is smooth, just when one app is being quit (dont 
quoted text> > know why...) the mouse will be jerking for a few seconds...
> is the mouse jerky on any app quitting?
No.

quoted text> Or is your observation the  following: _sometimes_ apps quit 
> unexpectedly (their window just vanishes?), and _at the same time_,
> the mouse becomes jerky as well, for a few seconds?
Exactly.

quoted text> the mouse typically only becomes jerky when there's some really high 
> load on the system - anything else would be a kernel bug. A jerky
> mouse on an unloaded system is definitely a sign of some sort of
> kernel bug  (in or outside of the scheduler). An app vanishing
> unexpectedly might mean an OOM-kill - but that would should up in the
> syslog as well.    
> Pretty weird.
Well, the system uses about 30% of the cpu (cool'n'quite put it on the 
lowest frequency).

I made a plain 2.6.22.1 and could use it for about 2 hours without 
any problem. Then I applied the cfs-v19 for that kernel, rebuild from 
mrproper with the saved config and booted. After a few minutes the 
first app vanished... some more followed by time (I just surfed around 
a bit...)

The dmesg output is not differing in any interesting point (just some 
numbers, like raid-benchmark, some irqs or usb-numbers...)

So its obviously something within cfs... unfortunately...

quoted text> Can you make this regression trigger arbitrarily, so that we could
> debug it better? Apps exiting unexpectedly can be debugged via: 
> 
http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.22-rc6/2.6.22-rc6-mm1/b...
quoted text> 
> you can turn it on via the print-fatal-signals=1 boot option or via:
> 
>   echo 1 > /proc/sys/kernel/print-fatal-signals
> 
> this feature will produce a small dump to the syslog about every app 
> that exits unexpectedly. Note that this might not cover all types of 
> "window suddenly vanishes" regressions.
Nothing is printed for a disapeared app for me.


Is there anything more I can try?


   Markus
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Messages in current thread:

[patch] CFS scheduler, -v19, Ingo Molnar, (Fri Jul 6, 1:33 pm)

Re: [patch] CFS scheduler, -v19, Ed Tomlinson, (Sat Jul 14, 1:19 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 16, 5:17 am)

Re: [patch] CFS scheduler, -v19, Ed Tomlinson, (Mon Jul 16, 7:10 am)

Re: [patch] CFS scheduler, -v19, Mike Galbraith, (Sun Jul 15, 1:25 am)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 16, 4:00 am)

Re: [patch] CFS scheduler, -v19, Markus, (Sun Jul 15, 8:53 am)

Re: [patch] CFS scheduler, -v19, Mike Galbraith, (Sun Jul 15, 3:46 pm)

Re: [patch] CFS scheduler, -v19, Markus, (Sun Jul 15, 5:11 pm)

Re: [patch] CFS scheduler, -v19, Mike Galbraith, (Mon Jul 16, 2:42 am)

Re: [patch] CFS scheduler, -v19, Markus, (Sat Jul 14, 7:34 am)

Re: [patch] CFS scheduler, -v19, Markus, (Sat Jul 14, 11:11 am)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 16, 5:41 am)

Re: [patch] CFS scheduler, -v19, Markus, (Mon Jul 16, 1:59 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 3:37 am)

Re: [patch] CFS scheduler, -v19, Markus, (Tue Jul 17, 9:06 am)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 1:06 pm)

Re: [patch] CFS scheduler, -v19, Markus, (Tue Jul 17, 3:42 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 4:09 pm)

Re: [patch] CFS scheduler, -v19, Linus Torvalds, (Tue Jul 17, 4:37 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 4:43 pm)

Re: [patch] CFS scheduler, -v19, Markus, (Tue Oct 16, 8:02 pm)

Re: [patch] CFS scheduler, -v19, Markus, (Thu Aug 9, 1:34 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Fri Aug 10, 3:46 am)

Re: [patch] CFS scheduler, -v19, Markus, (Tue Aug 14, 1:15 pm)

Re: [patch] CFS scheduler, -v19, Markus, (Fri Jul 20, 6:26 pm)

Re: konqueror suddenly vanishing, "konqueror: Fatal IO error..., Ingo Molnar, (Sun Jul 22, 7:59 am)

Re: konqueror suddenly vanishing, "konqueror: Fatal IO error..., Markus, (Sun Jul 22, 10:26 am)

Re: [patch] CFS scheduler, -v19, Markus, (Tue Jul 17, 6:03 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 1:13 pm)

Re: [patch] CFS scheduler, -v19, Mike Galbraith, (Tue Jul 10, 4:08 am)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Wed Jul 11, 1:26 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Wed Jul 11, 4:55 pm)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Fri Jul 13, 5:19 pm)

Re: [patch] CFS scheduler, -v19, Chuck Ebbert, (Mon Jul 16, 5:34 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 16, 5:55 pm)

Re: [patch] CFS scheduler, -v19, Ian Kent, (Tue Jul 17, 1:01 am)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 3:45 am)

Re: [patch] CFS scheduler, -v19, Linus Torvalds, (Wed Jul 18, 12:03 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 4:16 am)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Wed Jul 18, 5:37 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 10:32 am)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Thu Jul 19, 10:32 pm)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Thu Jul 19, 1:06 pm)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Thu Jul 19, 1:26 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 1:42 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 1:17 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 1:10 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 4:53 am)

Re: [patch] CFS scheduler, -v19, Ian Kent, (Wed Jul 18, 1:31 pm)

RE: [patch] CFS scheduler, -v19, David Schwartz, (Tue Jul 17, 5:16 pm)

RE: [patch] CFS scheduler, -v19, Ian Kent, (Wed Jul 18, 1:59 am)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Wed Jul 18, 3:54 am)

Re: [patch] CFS scheduler, -v19, Linus Torvalds, (Wed Jul 18, 1:23 pm)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Wed Jul 18, 9:50 am)

Re: [patch] CFS scheduler, -v19, Chuck Ebbert, (Tue Jul 17, 12:30 pm)

Re: [patch] CFS scheduler, -v19, Ian Kent, (Tue Jul 17, 7:17 am)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 1:16 pm)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Tue Jul 17, 9:24 pm)

Re: [patch] CFS scheduler, -v19, Ian Kent, (Wed Jul 18, 2:19 am)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Tue Jul 17, 12:22 am)

Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Thu Jul 12, 8:41 am)

Re: [patch] CFS scheduler, -v19, Willy Tarreau, (Sun Jul 8, 1:46 pm)

Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 9, 6:39 pm)

Re: [patch] CFS scheduler, -v19, Willy Tarreau, (Tue Jul 17, 5:44 pm)


linux-kernel:
Greg Kroah-Hartman	[PATCH 001/196] Chinese: Add the known_regression URI to the HOWTO
Linus Torvalds	Linux 2.6.21-rc1
Tarkan Erimer	Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
pageexec	Re: [stable] Linux 2.6.25.10
linux-netdev:
Linus Torvalds	Re: [GIT]: Networking
Gerrit Renker	[PATCH 15/37] dccp: Set per-connection CCIDs via socket options
Natalie Protasevich	[BUG] New Kernel Bugs
Jarek Poplawski	[PATCH take 2] pkt_sched: Protect gen estimators under est_lock.
git:

openmoko-community:

Re: [patch] CFS scheduler, -v19

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