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From: Erich Focht <efocht@ess.nec.de>
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: O(1) scheduler "complex" macros
Date: Wed, 10 Jul 2002 14:34:07 +0200
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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

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