linux-kernel - Re: sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1

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Date:	Thu, 08 May 2008 12:00:14 +0200
From:	Mike Galbraith <efault@....de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1


On Thu, 2008-05-08 at 11:25 +0200, Ingo Molnar wrote:
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > -	down(&kernel_sem);
> > +	if (panic_timeout) {
> > +		while (down_trylock(&kernel_sem))
> > +			cpu_relax();
> 
> updated one below - this will work fine in the !panic_timeout case too 
> ;-)

Same result.

	-Mike

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