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

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Message-ID: <alpine.DEB.2.00.1108261004430.5818@router.home>
Date:	Fri, 26 Aug 2011 10:05:14 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Zhao Jin <cronozhj@...il.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, 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.


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