linux-kernel - Re: High lock spin time for zone->lru

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Message-ID: <20070113074242.GB4234@localhost.localdomain>
Date:	Fri, 12 Jan 2007 23:42:42 -0800
From:	Ravikiran G Thirumalai <kiran@...lex86.org>
To:	Andrew Morton <akpm@...l.org>
Cc:	Christoph Lameter <clameter@....com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Andi Kleen <ak@...e.de>,
	"Shai Fultheim (Shai@...lex86.org)" <shai@...lex86.org>,
	pravin b shelar <pravin.shelar@...softinc.com>,
	a.p.zijlstra@...llo.nl
Subject: Re: High lock spin time for zone->lru_lock under extreme conditions

On Fri, Jan 12, 2007 at 05:11:16PM -0800, Andrew Morton wrote:
> On Fri, 12 Jan 2007 17:00:39 -0800
> Ravikiran G Thirumalai <kiran@...lex86.org> wrote:
> 
> > But is
> > lru_lock an issue is another question.
> 
> I doubt it, although there might be changes we can make in there to
> work around it.
> 
> <mentions PAGEVEC_SIZE again>

I tested with PAGEVEC_SIZE define to 62 and 126 -- no difference.  I still
notice the atrociously high spin times.

Thanks,
Kiran
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