linux-kernel - Re: [PATCH] slab: avoid unnecessary touching of a partial slab

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Message-ID: <1314371374.8991.49.camel@vm>
Date:	Fri, 26 Aug 2011 23:09:34 +0800
From:	Zhao Jin <cronozhj@...il.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	penberg@...nel.org, mpm@...enic.com, trivial@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] slab: avoid unnecessary touching of a partial slab

On Fri, 2011-08-26 at 10:05 -0500, Christoph Lameter wrote:
> On Fri, 26 Aug 2011, Zhao Jin wrote:
> 
> > > Correct but still tthe del/add is a list_move operation. Convert that the
> > > other case as well?
> > >
> > Yes. The patch avoids list_del/list_add only if it is the case that a
> > partial slab was used for refilling and remains partial (that is:
> > partial => partial). If it is not the case( so it must be either partial
> > => full, free => full or free => partial) the patched code behaves the
> > same as current (list_del/list_add).
> 
> The second case is what I want you to change to list_move.
> 
> 
Oops. I misunderstood your reply... I shall do it. Thanks a lot for
pointing it out.

Regards,
zhj


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