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Subject: Re: sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1
From: Mike Galbraith <efault@gmx.de>
To: Ingo Molnar <mingo@elte.hu>
Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>,
       LKML <linux-kernel@vger.kernel.org>
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Date: Thu, 08 May 2008 12:00:14 +0200
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On Thu, 2008-05-08 at 11:25 +0200, Ingo Molnar wrote:
> * Ingo Molnar <mingo@elte.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