linux-kernel - Re: [GIT PULL] Lockless SLUB slowpaths for v3.1-rc1

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Message-ID: <alpine.DEB.2.00.1108021131250.21126@router.home>
Date:	Tue, 2 Aug 2011 11:36:29 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	David Rientjes <rientjes@...gle.com>
cc:	Pekka Enberg <penberg@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>, hughd@...gle.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [GIT PULL] Lockless SLUB slowpaths for v3.1-rc1

On Tue, 2 Aug 2011, David Rientjes wrote:

> allocator, in this case.  And the per-cpu partial list will add even
> additional slab usage for slub, so this is where my "throwing more memory
> at slub to get better performance" came from.  I understand that this is a
> large NUMA machine, though, and the cost of slub may be substantially
> lower on smaller machines.

The per cpu partial lists only add the need for more memory if other
processors have to allocate new pages because they do not have enough
partial slab pages to satisfy their needs. That can be tuned by a cap on
objects.


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