From: Eric Dumazet <dada1@cosmosbay.com>
To: Benjamin LaHaise <bcrl@kvack.org>
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: Thu, 12 Mar 2009 04:40:12 +0100 [thread overview]
Message-ID: <49B8841C.20701@cosmosbay.com> (raw)
In-Reply-To: <20090312033613.GJ18665@kvack.org>
Benjamin LaHaise a écrit :
> 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.
Yes, you are right, AIO doesnt break fget_light()
next prev parent reply other threads:[~2009-03-12 3:41 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
2009-03-12 3:40 ` Eric Dumazet [this message]
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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