From: Peter Zijlstra <peterz@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: Ted Ts'o <tytso@mit.edu>, David Rientjes <rientjes@google.com>,
Jens Axboe <jaxboe@fusionio.com>,
Andrew Morton <akpm@linux-foundation.org>,
Neil Brown <neilb@suse.de>, Alasdair G Kergon <agk@redhat.com>,
Chris Mason <chris.mason@oracle.com>,
Steven Whitehouse <swhiteho@redhat.com>, Jan Kara <jack@suse.cz>,
Frederic Weisbecker <fweisbec@gmail.com>,
"linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>,
"linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>,
"cluster-devel@redhat.com" <cluster-devel@redhat.com>,
"linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
"reiserfs-devel@vger.kernel.org" <reiserfs-devel@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [patch 1/5] mm: add nofail variants of kmalloc kcalloc and kzalloc
Date: Wed, 25 Aug 2010 15:35:42 +0200 [thread overview]
Message-ID: <1282743342.2605.3707.camel@laptop> (raw)
In-Reply-To: <20100825132417.GQ31488@dastard>
On Wed, 2010-08-25 at 23:24 +1000, Dave Chinner wrote:
>
> That is, the guarantee that we will always make progress simply does
> not exist in filesystems, so a mempool-like concept seems to me to
> be doomed from the start....
While I appreciate that it might be somewhat (a lot) harder for a
filesystem to provide that guarantee, I'd be deeply worried about your
claim that its impossible.
It would render a system without swap very prone to deadlocks. Even with
the very tight dirty page accounting we currently have you can fill all
your memory with anonymous pages, at which point there's nothing free
and you require writeout of dirty pages to succeed.
next prev parent reply other threads:[~2010-08-25 13:35 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-24 10:50 [patch 1/5] mm: add nofail variants of kmalloc kcalloc and kzalloc David Rientjes
2010-08-24 10:50 ` [patch 4/5] btrfs: add nofail variant of set_extent_dirty David Rientjes
2010-08-24 13:30 ` Peter Zijlstra
2010-08-24 12:15 ` [patch 1/5] mm: add nofail variants of kmalloc kcalloc and kzalloc Jan Kara
2010-08-24 13:29 ` Peter Zijlstra
2010-08-24 13:33 ` Jens Axboe
2010-08-24 20:11 ` David Rientjes
2010-08-25 11:24 ` Ted Ts'o
2010-08-25 11:35 ` Peter Zijlstra
2010-08-25 11:57 ` Ted Ts'o
2010-08-25 12:48 ` Peter Zijlstra
2010-08-25 12:52 ` Peter Zijlstra
2010-08-25 13:20 ` Theodore Tso
2010-08-25 13:31 ` Peter Zijlstra
2010-08-25 20:43 ` David Rientjes
2010-08-25 20:55 ` Peter Zijlstra
2010-08-25 21:11 ` David Rientjes
2010-08-25 21:27 ` Peter Zijlstra
2010-08-25 23:11 ` David Rientjes
2010-08-26 0:19 ` Ted Ts'o
2010-08-26 0:30 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1008251724360.25783@chino.kir.corp.google.com>
2010-08-26 1:48 ` Ted Ts'o
2010-08-26 3:09 ` David Rientjes
2010-08-26 6:38 ` Dave Chinner
[not found] ` <alpine.DEB.2.00.1008251951230.7034@chino.kir.corp.google.com>
2010-08-26 7:06 ` Dave Chinner
2010-08-26 8:29 ` Peter Zijlstra
2010-08-25 13:34 ` Peter Zijlstra
2010-08-25 13:24 ` Dave Chinner
2010-08-25 13:35 ` Peter Zijlstra [this message]
2010-08-25 20:53 ` Ted Ts'o
2010-08-25 20:59 ` David Rientjes
2010-08-25 21:35 ` Peter Zijlstra
2010-08-25 20:58 ` David Rientjes
2010-08-25 21:11 ` Christoph Lameter
2010-08-25 21:21 ` Peter Zijlstra
2010-08-25 21:23 ` David Rientjes
2010-08-25 21:35 ` Christoph Lameter
2010-08-25 23:05 ` David Rientjes
2010-08-26 1:30 ` Christoph Lameter
2010-08-26 3:12 ` David Rientjes
2010-08-26 14:16 ` Christoph Lameter
2010-08-26 22:31 ` David Rientjes
2010-08-26 0:09 ` Dave Chinner
2010-08-25 14:13 ` Peter Zijlstra
2010-08-24 13:55 ` Dave Chinner
2010-08-24 14:03 ` Peter Zijlstra
2010-08-24 20:12 ` David Rientjes
2010-08-24 20:08 ` David Rientjes
2010-09-02 1:02 ` [patch v2 " David Rientjes
2010-09-02 1:03 ` [patch v2 4/5] btrfs: add nofail variant of set_extent_dirty David Rientjes
2010-09-02 7:59 ` [patch v2 1/5] mm: add nofail variants of kmalloc kcalloc and kzalloc Jiri Slaby
2010-09-02 14:51 ` Jan Kara
2010-09-02 21:15 ` Neil Brown
2010-09-05 23:03 ` David Rientjes
2010-09-05 23:01 ` David Rientjes
2010-09-06 9:05 ` David Rientjes
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