Re: [PATCH v2 1/2] sched: schedule_tail() should disable preemption
From: Peter Zijlstra
Date: Thu Oct 09 2014 - 11:17:41 EST
On Thu, Oct 09, 2014 at 04:57:26PM +0200, Oleg Nesterov wrote:
> but first we need to remove ->saved_preempt_count.
Why do you want to kill that? Your earlier proposal would penalize every
!x86 arch by adding extra code to the scheduler core while they already
automagically preserve their thread_info::preempt_count.
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