Re: [Bugme-new] [Bug 8100] New: dynticks makes ksoftirqd1 use unreasonable amount of cpu time

Re: [Bugme-new] [Bug 8100] New: dynticks makes ksoftirqd1 use unreasonable amount of cpu time

[Andrew Morton]

On Wed, 28 Feb 2007 09:34:10 -0800
bugme-daemon@bugzilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=8100
> 
>            Summary: dynticks makes ksoftirqd1 use unreasonable amount of cpu
>                     time
>     Kernel Version: 2.6.21-rc2
>             Status: NEW
>           Severity: low
>              Owner: johnstul@us.ibm.com
>          Submitter: jkarlson@cc.hut.fi
> 
> 
> Most recent kernel where this bug did *NOT* occur:
> any kernel without dynticks
> 
> Distribution:
> Debian etch with linux-2.6.21-rc{2,1}
> 
> Hardware Environment: 
> Macbook core2 with bios emulation
> 
> Software Environment:
> The problem is obvious when listening to shoutcast stream with kmplayer and 
> artsd via wi-fi with  wpa (wpa_supplicant)
> 
> Problem Description:
> ksoftirqd1 uses ~30% cpu-time (by top) no other symptoms, while
> without dyntikcs cpu-load in similar circumstances is negligible.
> This might be a dynticks feature rather than bug.
> 
> Steps to reproduce:
> Just watch the top, if the bug is reproducible, probably just booting should 
> suffice.
> 
> ------- You are receiving this mail because: -------
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Re: [Bugme-new] [Bug 8100] New: dynticks makes ksoftirqd1 use unreasonable amount of cpu time

[Pavel Machek]

Hi!

> bugme-daemon@bugzilla.kernel.org wrote:
> 
> > http://bugzilla.kernel.org/show_bug.cgi?id=8100
> > 
> >            Summary: dynticks makes ksoftirqd1 use unreasonable amount of cpu
> >                     time
> >     Kernel Version: 2.6.21-rc2
> >             Status: NEW
> >           Severity: low
> >              Owner: johnstul@us.ibm.com
> >          Submitter: jkarlson@cc.hut.fi
> > 
> > 
> > Most recent kernel where this bug did *NOT* occur:
> > any kernel without dynticks
> > 
> > Distribution:
> > Debian etch with linux-2.6.21-rc{2,1}
> > 
> > Hardware Environment: 
> > Macbook core2 with bios emulation
> > 
> > Software Environment:
> > The problem is obvious when listening to shoutcast stream with kmplayer and 
> > artsd via wi-fi with  wpa (wpa_supplicant)
> > 
> > Problem Description:
> > ksoftirqd1 uses ~30% cpu-time (by top) no other symptoms, while
> > without dyntikcs cpu-load in similar circumstances is negligible.
> > This might be a dynticks feature rather than bug.

top lies. top has always lied, now it lies more. Do not trust top.
RESOLVED/INVALID?

							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html