Messages in this thread | | | Date | Mon, 4 Mar 2002 16:41:30 -0800 | From | Mike Fedyk <> | Subject | Re: [PATCH] preempt-kernel on 2.4.19-pre2-ac2 bugfix |
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On Mon, Mar 04, 2002 at 07:23:10PM -0500, Robert Love wrote: > The same schedule_tail bug affecting 2.5 affects 2.4 with O(1). I.e., > 2.4.19-pre2-ac2. > > In recent O(1) scheduler releases, an optimization was made that removed > schedule_tail from UP kernels. This causes the initial preempt_count of > a new task, which starts at 1, to never decrement to zero and thus never > become preemptible. CONFIG_PREEMPT requires schedule_tail, too. > > Users of 2.4+O(1)+preempt (i.e. -ac) should use this patch: >
I believe you want to say that O(1)sched is in -ac, and this patch will add preempt on top of that, not that preempt is already in -ac (unless I missed something...)
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