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From: Erich Focht <efocht@ess.nec.de>
To: linux-ia64@vger.kernel.org
Subject: [Linux-ia64] Re: O(1) scheduler "complex" macros
Date: Wed, 10 Jul 2002 12:34:07 +0000	[thread overview]
Message-ID: <marc-linux-ia64-105590701905756@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590701905752@msgid-missing>

Hi Ingo,

> there is one more detail - wait_task_inactive() needs to consider the
> ->switch_lock as well - otherwise exit() might end up freeing the
> pagetables earlier than the context-switch has truly finished. The
> udelay(100) test should trigger this race.
>
> i've fixed this and uploaded the -A8 patch:
>
>         http://redhat.com/~mingo/O(1)-scheduler/sched-2.5.25-A8
>
> does this fix the ia64 crashes? you need to define an ia64-specific

looks good! Rock solid despite udelay. Though a bit slower than before...

Thanks a lot for the help!

Erich



  reply	other threads:[~2002-07-10 12:34 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-07-10  9:05 [Linux-ia64] Re: O(1) scheduler "complex" macros Erich Focht
2002-07-10 12:34 ` Erich Focht [this message]
2002-07-10 18:31 ` Ingo Molnar
2002-07-10 19:30 ` Ingo Molnar
2002-07-11  9:25 ` Erich Focht
2002-07-11  9:31 ` Ingo Molnar
2002-07-11  9:39 ` Ingo Molnar
2002-07-11  9:52 ` Ingo Molnar
2002-07-12 12:39 ` Pavel Machek

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