From: Joel Becker <Joel.Becker@oracle.com>
To: Theodore Tso <tytso@mit.edu>,
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 14:05:49 -0700 [thread overview]
Message-ID: <20090625210549.GM20311@mail.oracle.com> (raw)
In-Reply-To: <20090625203743.GD6472@mit.edu>
On Thu, Jun 25, 2009 at 04:37:43PM -0400, Theodore Tso wrote:
> Nicely spotted. Yeah, that's a bug; we need to do something about
> that one, too. And what we're doing is a bit silly; it may make sense
> to use __get_free_pages if filesystem blocksize == PAGE_SIZE, but
> otherwise we should be using a sub-page allocator. Right now, we're
> chewing up a 16k PPC page for every 4k filesystem metadata page
> allocated in journal_write_metadata_buffer(), and on x86, for the
> (admittedly uncommon) 1k block filesystem, we'd be chewing up a 4k
> page for a 1k block buffer.
>
>
> Both of these problems exist for both ext3 and ext4.
And ocfs2.
Joel
--
Life's Little Instruction Book #337
"Reread your favorite book."
Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@oracle.com
Phone: (650) 506-8127
next prev parent reply other threads:[~2009-06-25 21:08 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-24 15:07 upcoming kerneloops.org item: get_page_from_freelist Arjan van de Ven
2009-06-24 16:46 ` Andrew Morton
2009-06-24 16:52 ` Linus Torvalds
2009-06-24 16:55 ` Pekka Enberg
2009-06-24 16:56 ` Pekka Enberg
2009-06-24 17:00 ` Pekka Enberg
2009-06-24 17:55 ` Andrew Morton
2009-06-24 17:53 ` Pekka Enberg
2009-06-24 18:30 ` Andrew Morton
2009-06-24 18:42 ` Linus Torvalds
2009-06-24 18:44 ` Pekka Enberg
2009-06-24 18:50 ` Linus Torvalds
2009-06-24 19:12 ` Pekka J Enberg
2009-06-24 19:21 ` Linus Torvalds
2009-06-24 19:06 ` Andrew Morton
2009-06-24 19:16 ` Linus Torvalds
2009-06-24 19:36 ` Andrew Morton
2009-06-24 19:46 ` Linus Torvalds
2009-06-24 19:47 ` Linus Torvalds
2009-06-24 20:01 ` Andrew Morton
2009-06-24 20:13 ` Linus Torvalds
2009-06-24 20:40 ` Linus Torvalds
2009-06-24 22:07 ` Andrew Morton
2009-06-25 4:05 ` Nick Piggin
2009-06-25 13:25 ` Theodore Tso
2009-06-25 18:51 ` David Rientjes
2009-06-25 19:38 ` Theodore Tso
2009-06-25 19:44 ` Theodore Tso
2009-06-25 19:55 ` Andrew Morton
2009-06-25 20:11 ` Linus Torvalds
2009-06-25 20:22 ` Linus Torvalds
2009-06-25 20:36 ` David Rientjes
2009-06-25 20:51 ` Linus Torvalds
2009-06-25 22:25 ` David Rientjes
2009-06-26 8:51 ` Nick Piggin
2009-06-25 20:18 ` David Rientjes
2009-06-25 20:37 ` Theodore Tso
2009-06-25 21:05 ` Joel Becker [this message]
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
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
2009-06-25 19:55 ` Jens Axboe
2009-06-25 20:08 ` Jens Axboe
2009-06-24 21:56 ` Andrew Morton
2009-06-25 4:14 ` Nick Piggin
2009-06-25 8:21 ` David Rientjes
2009-06-29 15:30 ` Mel Gorman
2009-06-29 19:20 ` Andrew Morton
2009-06-30 11:00 ` Mel Gorman
2009-06-30 19:35 ` David Rientjes
2009-06-30 20:32 ` Mel Gorman
2009-06-30 20:51 ` David Rientjes
2009-07-01 10:22 ` Mel Gorman
2009-06-29 23:35 ` David Rientjes
2009-06-30 7:47 ` Nick Piggin
2009-06-30 8:13 ` David Rientjes
2009-06-30 8:24 ` Nick Piggin
2009-06-30 8:41 ` David Rientjes
2009-06-30 9:09 ` Nick Piggin
2009-06-30 19:47 ` David Rientjes
2009-06-30 6:27 ` Pavel Machek
2009-06-28 10:16 ` Pavel Machek
2009-06-28 18:01 ` Linus Torvalds
2009-06-28 18:27 ` Arjan van de Ven
2009-06-28 18:36 ` Linus Torvalds
2009-06-30 7:35 ` Pavel Machek
2009-06-24 18:43 ` Pekka Enberg
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