From: Theodore Tso <tytso@mit.edu>
To: Eric Sandeen <sandeen@redhat.com>
Cc: Andreas Dilger <adilger@sun.com>,
David Rientjes <rientjes@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
penberg@cs.helsinki.fi, arjan@infradead.org,
linux-kernel@vger.kernel.org, cl@linux-foundation.org,
npiggin@suse.de, linux-ext4@vger.kernel.org
Subject: Re: upcoming kerneloops.org item: get_page_from_freelist
Date: Thu, 25 Jun 2009 21:11:55 -0400 [thread overview]
Message-ID: <20090626011155.GI6472@mit.edu> (raw)
In-Reply-To: <4A43F60D.2040801@redhat.com>
On Thu, Jun 25, 2009 at 05:11:25PM -0500, Eric Sandeen wrote:
>
> ecryptfs used to do kmalloc(PAGE_CACHE_SIZE) & virt_to_page on that, and
> with SLUB + slub debug, that gave back non-aligned memory, causing
> eventual corruption ...
Grumble. Any chance we could add an kmem_cache option which requires
the memory to be aligned? Otherwise we could rewrite our own sub-page
allocator in ext4 that only handled aligned filesystem block sizes
(i.e., 1k, 2k, 4k, etc.) but that would be really silly and be extra
code that really should be done once at core functionality.
- Ted
next prev parent reply other threads:[~2009-06-26 1:12 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <alpine.LFD.2.01.0906241240360.3154@localhost.localdomain>
[not found] ` <20090624130121.99321cca.akpm@linux-foundation.org>
[not found] ` <alpine.LFD.2.01.0906241312090.3154@localhost.localdomain>
[not found] ` <alpine.LFD.2.01.0906241334260.3154@localhost.localdomain>
[not found] ` <20090624150714.c7264768.akpm@linux-foundation.org>
[not found] ` <20090625132544.GB9995@mit.edu>
[not found] ` <alpine.DEB.2.00.0906251135440.30090@chino.kir.corp.google.com>
[not found] ` <20090625193806.GA6472@mit.edu>
[not found] ` <20090625194423.GB6472@mit.edu>
[not found] ` <alpine.DEB.2.00.0906251257040.3086@chino.kir.corp.google.com>
2009-06-25 20:37 ` upcoming kerneloops.org item: get_page_from_freelist Theodore Tso
2009-06-25 21:05 ` Joel Becker
2009-06-25 21:26 ` Andreas Dilger
2009-06-25 22:05 ` Theodore Tso
2009-06-25 22:11 ` Eric Sandeen
2009-06-26 1:11 ` Theodore Tso [this message]
2009-06-26 5:16 ` Pekka J Enberg
2009-06-26 8:56 ` Nick Piggin
2009-06-26 8:58 ` Pekka Enberg
2009-06-26 9:07 ` Nick Piggin
2009-06-29 21:06 ` Christoph Lameter
2009-06-30 7:59 ` Nick Piggin
2009-06-26 14:41 ` Eric Sandeen
2009-06-29 21:15 ` Christoph Lameter
2009-06-29 21:20 ` Eric Sandeen
2009-06-29 22:35 ` Christoph Lameter
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