From: Benjamin LaHaise <bcrl@kvack.org>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Jeff Moyer <jmoyer@redhat.com>, Avi Kivity <avi@redhat.com>,
linux-aio <linux-aio@kvack.org>,
zach.brown@oracle.com, linux-kernel@vger.kernel.org,
Davide Libenzi <davidel@xmailserver.org>
Subject: Re: [patch] aio: remove aio-max-nr and instead use the memlock rlimit to limit the number of pages pinned for the aio completion ring
Date: Wed, 11 Mar 2009 23:36:13 -0400 [thread overview]
Message-ID: <20090312033613.GJ18665@kvack.org> (raw)
In-Reply-To: <49B88280.8060603@cosmosbay.com>
On Thu, Mar 12, 2009 at 04:33:20AM +0100, Eric Dumazet wrote:
> aio breaks the fget_light() concept too, if process is mono threaded.
AIO requests cannot use fget_light(). The user space program could very
well use the close() syscall to destroy the file descriptor while an io
request is in flight, so you cannot avoid the reference counting overhead.
-ben
next prev parent reply other threads:[~2009-03-12 3:36 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-09 15:49 [patch] aio: remove aio-max-nr and instead use the memlock rlimit to limit the number of pages pinned for the aio completion ring Jeff Moyer
2009-03-09 15:54 ` [patch] factor out checks against the memlock rlimit Jeff Moyer
2009-03-09 15:59 ` [patch] man-pages: add documentation about the memlock implications of io_setup Jeff Moyer
2009-03-09 16:45 ` Michael Kerrisk
2009-03-09 16:48 ` Michael Kerrisk
2009-03-09 20:44 ` Jeff Moyer
2009-03-09 16:18 ` [patch] aio: remove aio-max-nr and instead use the memlock rlimit to limit the number of pages pinned for the aio completion ring Avi Kivity
2009-03-09 17:57 ` Jeff Moyer
2009-03-09 19:45 ` Avi Kivity
2009-03-09 20:36 ` Jamie Lokier
2009-03-10 8:36 ` Avi Kivity
2009-03-09 20:31 ` Eric Dumazet
2009-03-12 2:39 ` Eric Dumazet
2009-03-12 2:44 ` Benjamin LaHaise
2009-03-12 3:24 ` Eric Dumazet
2009-03-12 3:29 ` Benjamin LaHaise
2009-03-12 3:33 ` Eric Dumazet
2009-03-12 3:36 ` Benjamin LaHaise [this message]
2009-03-12 3:40 ` Eric Dumazet
2009-03-12 3:09 ` Eric Dumazet
2009-03-12 5:18 ` [PATCH] fs: fput() can be called from interrupt context Eric Dumazet
2009-03-12 5:42 ` [PATCH] aio: " Eric Dumazet
2009-03-12 5:47 ` [PATCH] fs: " Andrew Morton
2009-03-12 6:10 ` Eric Dumazet
2009-03-12 6:39 ` Andrew Morton
2009-03-12 13:39 ` Davide Libenzi
2009-03-13 22:34 ` Davide Libenzi
2009-03-13 22:43 ` Eric Dumazet
2009-03-13 23:28 ` Trond Myklebust
2009-03-14 1:40 ` Davide Libenzi
2009-03-14 4:02 ` Trond Myklebust
2009-03-14 14:32 ` Davide Libenzi
2009-03-15 1:36 ` [patch] eventfd - remove fput() call from possible IRQ context Davide Libenzi
2009-03-15 17:44 ` Benjamin LaHaise
2009-03-15 20:08 ` [patch] eventfd - remove fput() call from possible IRQ context (2nd rev) Davide Libenzi
2009-03-16 17:25 ` Jamie Lokier
2009-03-16 18:36 ` Davide Libenzi
2009-03-18 14:22 ` Jeff Moyer
2009-03-18 14:46 ` Davide Libenzi
2009-03-18 14:55 ` Eric Dumazet
2009-03-18 15:25 ` Jeff Moyer
2009-03-18 15:43 ` Eric Dumazet
2009-03-18 16:13 ` Jeff Moyer
2009-03-18 17:25 ` [patch] eventfd - remove fput() call from possible IRQ context (3rd rev) Davide Libenzi
2009-03-18 17:34 ` Jeff Moyer
2009-03-12 19:22 ` [PATCH] fs: fput() can be called from interrupt context Eric Dumazet
2009-03-12 20:21 ` Andrew Morton
2009-03-09 22:36 ` [patch] aio: remove aio-max-nr and instead use the memlock rlimit to limit the number of pages pinned for the aio completion ring Andrew Morton
2009-03-10 13:43 ` Jeff Moyer
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