linux-kernel - Re: SLUB defrag pull request?

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Date:	Thu, 30 Oct 2008 10:45:45 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	Eric Dumazet <dada1@...mosbay.com>,
	Miklos Szeredi <miklos@...redi.hu>, nickpiggin@...oo.com.au,
	hugh@...itas.com, linux-mm@...ck.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: SLUB defrag pull request?

On Tue, 28 Oct 2008, Pekka Enberg wrote:

> Christoph, I was sort of expecting a NAK/ACK from you before merging
> this. I would be nice to have numbers on this but then again I don't see
> how this can hurt either.

Its an additional instruction in a hot path. Lets see some numbers first.

Try tbench. Seems to be very popular recently. Or my microbenchmarks 
for slab allocations on kernel.org.


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