From: "Antonio Vargas" <windenntw@gmail.com>
To: qemu-devel@nongnu.org
Subject: Re: [kvm-devel] [Qemu-devel] Re: [PATCH 1/3] Refactor AIO interface to allow other AIO implementations
Date: Fri, 2 May 2008 17:37:05 +0100 [thread overview]
Message-ID: <69304d110805020937l2f867cadrd7c906b8eb77b3f6@mail.gmail.com> (raw)
In-Reply-To: <20080422153616.GC10229@shareable.org>
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On Tue, Apr 22, 2008 at 4:36 PM, Jamie Lokier <jamie@shareable.org> wrote:
*snip*
>
> Btw, regarding QEMU: QEMU gets requests _after_ sorting by the guest's
> elevator, then submits them to the host's elevator. If the guest and
> host elevators are both configured 'anticipatory', do the anticipatory
> delays add up?
>
Anticipatory is non-work-conserving. If the data is going to end passing
thru
host's deadline scheduler, probably it is better to the guest with deadline
or maybe even no-op since it doesn't really know anything about the real
disk locations of the data.
--
Greetz, Antonio Vargas aka winden of rgba^ntw^bg
http://winden.wordpress.com/
windenntw@gmail.com
Every day, every year
you have to work
you have to study
you have to scene.
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next prev parent reply other threads:[~2008-05-02 16:37 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-17 19:26 [Qemu-devel] [PATCH 1/3] Refactor AIO interface to allow other AIO implementations Anthony Liguori
2008-04-17 19:26 ` [Qemu-devel] [PATCH 2/3] Split out posix-aio code Anthony Liguori
2008-04-17 19:26 ` [Qemu-devel] [PATCH 3/3] Implement linux-aio backend Anthony Liguori
2008-04-18 15:09 ` [Qemu-devel] " Marcelo Tosatti
2008-04-18 15:18 ` Anthony Liguori
2008-04-18 17:46 ` Marcelo Tosatti
2008-04-17 19:38 ` [Qemu-devel] Re: [kvm-devel] [PATCH 1/3] Refactor AIO interface to allow other AIO implementations Daniel P. Berrange
2008-04-17 19:41 ` Anthony Liguori
2008-04-17 20:00 ` Daniel P. Berrange
2008-04-17 20:05 ` Anthony Liguori
2008-04-18 12:43 ` Jamie Lokier
2008-04-18 15:23 ` Anthony Liguori
2008-04-18 16:22 ` Jamie Lokier
2008-04-18 16:32 ` [kvm-devel] [Qemu-devel] " Avi Kivity
2008-04-20 15:49 ` Jamie Lokier
2008-04-20 18:43 ` Avi Kivity
2008-04-20 23:39 ` Jamie Lokier
2008-04-21 6:39 ` Avi Kivity
2008-04-21 12:10 ` Jamie Lokier
2008-04-22 8:10 ` Avi Kivity
2008-04-22 14:28 ` Jamie Lokier
2008-04-22 14:53 ` Anthony Liguori
2008-04-22 15:05 ` Avi Kivity
2008-04-22 15:23 ` Jamie Lokier
2008-04-22 15:12 ` Jamie Lokier
2008-04-22 15:03 ` Avi Kivity
2008-04-22 15:36 ` Jamie Lokier
2008-05-02 16:37 ` Antonio Vargas [this message]
2008-05-02 17:18 ` Jamie Lokier
2008-05-02 17:52 ` Anthony Liguori
2008-05-02 18:24 ` Jamie Lokier
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