linux-kernel - Re: [git pull] scheduler fixes

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Date:	Mon, 02 Feb 2009 10:52:13 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alexey Zaytsev <alexey.zaytsev@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>
Subject: Re: [git pull] scheduler fixes

On Sat, 2009-01-31 at 20:49 +0300, Alexey Zaytsev wrote:
> And answering an earlier question, this happens only on i386 and only
> with 4K stacks because x86_64 dosn't have a separate softirq stack,
> so the preempt count diring the soft irq is at least IRQ_EXIT_OFFSET.

Which suggests that an initial preempt_count offset of 1 should suffice
to fix this issue and not confuse the softirq tracing, hmm?

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