From: Lee Revell <rlrevell@joe-job.com>
To: Gabriel Devenyi <devenyga@mcmaster.ca>
Cc: ck@vds.kolivas.org, linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Preempt Violation
Date: Fri, 16 Jul 2004 20:50:39 -0400 [thread overview]
Message-ID: <1090025439.2852.12.camel@mindpipe> (raw)
In-Reply-To: <200407162006.23456.devenyga@mcmaster.ca>
On Fri, 2004-07-16 at 20:06, Gabriel Devenyi wrote:
> This one looks particularly nasty.
>
> 20ms non-preemptible critical section violated 4 ms preempt threshold starting
> a
> t sys_ioctl+0x42/0x260 and ending at sys_ioctl+0xbd/0x260
> [<c015881d>] sys_ioctl+0xbd/0x260
> [<c0116510>] dec_preempt_count+0x110/0x120
> [<c015881d>] sys_ioctl+0xbd/0x260
> [<c0103e95>] sysenter_past_esp+0x52/0x71
Yes, it looks like there are serious issues with ioctl.
Are you using either of the recent patches to fully daemonize softirqs?
This should help a lot. I am using this one:
http://lkml.org/lkml/2004/7/13/125
It applied against 2.6.8-mm1, with only one PPC-specific reject, I use
i386 so it doesn't matter.
Here is another:
http://lkml.org/lkml/2004/7/13/152
Have not tested yet.
Lee
next prev parent reply other threads:[~2004-07-17 0:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-17 0:06 Preempt Violation Gabriel Devenyi
2004-07-17 0:50 ` Lee Revell [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-07-19 6:06 Zhu, Yi
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