linux-ext4 - Re: upcoming kerneloops.org item: get_page_from

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Message-ID: <alpine.DEB.1.10.0906291834090.21956@gentwo.org>
Date:	Mon, 29 Jun 2009 18:35:49 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Eric Sandeen <sandeen@...hat.com>
cc:	Pekka J Enberg <penberg@...helsinki.fi>,
	Theodore Tso <tytso@....edu>, Andreas Dilger <adilger@....com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	arjan@...radead.org, linux-kernel@...r.kernel.org, npiggin@...e.de,
	linux-ext4@...r.kernel.org
Subject: Re: upcoming kerneloops.org item: get_page_from_freelist

On Mon, 29 Jun 2009, Eric Sandeen wrote:

> > Isnt the problem that the slab allocator did not align something that
> > you did not request to be aligned?
>
> Well, maybe that's all I needed.  At the risk of exposing myself to
> ridicule, here's the commit:
>
> 7fcba054373d5dfc43d26e243a5c9b92069972ee
>
> Was there a better way?

No. Good patch. Indeed the right way. Page allocations come from the page
allocator not from the slab allocator (yes yes there are still issues with
the performance of the page allocator that sometimes dictate the use of
the slabs but in general I think this is what is needed).

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