From: Christoph Hellwig <hch@infradead.org>
To: Avi Kivity <avi@redhat.com>
Cc: Bernhard Schmidt <berni@birkenwald.de>, kvm@vger.kernel.org
Subject: Re: linux-aio usable?
Date: Mon, 8 Mar 2010 08:00:21 -0500 [thread overview]
Message-ID: <20100308130021.GA17498@infradead.org> (raw)
In-Reply-To: <4B94BF05.20609@redhat.com>
On Mon, Mar 08, 2010 at 11:10:29AM +0200, Avi Kivity wrote:
>> Are there any potential pitfalls?
>>
>
> It won't work well unless running on a block device (partition or LVM).
It will actually work well on pre-allocated filesystem images, at least
on XFS and NFS.
The real pitfal is that cache=none is required for kernel support as
it only supports O_DIRECT.
>> Is there any reason one should not compile that feature by default?
It's compiled by default if libaio and it's development headers are
found.
>> Does it do anything if not explicitly run with aio=native?
No.
next prev parent reply other threads:[~2010-03-08 13:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-08 1:46 linux-aio usable? Bernhard Schmidt
2010-03-08 9:10 ` Avi Kivity
2010-03-08 9:48 ` Bernhard Schmidt
2010-03-08 9:48 ` Avi Kivity
2010-03-08 14:25 ` Dustin Kirkland
2010-03-08 14:26 ` Avi Kivity
2010-03-08 16:28 ` Anthony Liguori
2010-03-08 16:36 ` Avi Kivity
2010-03-08 13:00 ` Christoph Hellwig [this message]
2010-03-08 20:11 ` Michael Tokarev
2010-03-08 20:19 ` Michael Tokarev
2010-03-09 9:08 ` Avi Kivity
2010-03-09 9:19 ` Michael Tokarev
2010-03-09 10:05 ` Avi Kivity
2010-03-09 14:12 ` Christoph Hellwig
2010-03-08 21:27 ` Nikola Ciprich
2010-03-08 21:46 ` Brian Jackson
2010-03-09 9:09 ` Avi Kivity
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