From: Michael Tokarev <mjt@tls.msk.ru>
To: Avi Kivity <avi@redhat.com>
Cc: Bernhard Schmidt <berni@birkenwald.de>, kvm@vger.kernel.org
Subject: Re: linux-aio usable?
Date: Mon, 08 Mar 2010 23:19:35 +0300 [thread overview]
Message-ID: <4B955BD7.1010508@msgid.tls.msk.ru> (raw)
In-Reply-To: <4B9559DA.8000407@msgid.tls.msk.ru>
Michael Tokarev wrote:
[]
> Apparently that does not quite work. I just re-compiled kvm with
> --enable-linux-aio (actually I just installed libaio-dev on debian
> and qemu-kvm's configure picked it up automatically), and tried
> a guest. But any I/O fails.
It has nothing to do with kvm. It is compat_ioctl32 in the kernel
wrt aio calls. Historically I've a 64bit kernel with 32bit userland,
and tried 32bit kvm too, and that does not work. But 64bit kvm works
just fine with aio, and the performance numbers are indeed better.
Thanks!
/mjt
next prev parent reply other threads:[~2010-03-08 20:19 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
2010-03-08 20:11 ` Michael Tokarev
2010-03-08 20:19 ` Michael Tokarev [this message]
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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