From: Kevin Wolf <kwolf@redhat.com>
To: ching <lsching17@gmail.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] linux aio and cache mode
Date: Mon, 24 Sep 2012 14:30:04 +0200 [thread overview]
Message-ID: <5060524C.2070509@redhat.com> (raw)
In-Reply-To: <506044DE.9060701@gmail.com>
Am 24.09.2012 13:32, schrieb ching:
> Hi all,
>
> My host is qemu-1.1.1 and x64 kernel 3.5.4. The guest is using aio="native"
>
> I am trying to use unsafe cache mode to boost i/o performance.
aio=native requires the image to be opened with O_DIRECT, i.e.
cache=none or cache=directsync. If you specify a different cache option,
it will silently fall back to aio=threads.
Kevin
next prev parent reply other threads:[~2012-09-24 12:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-24 11:32 [Qemu-devel] linux aio and cache mode ching
2012-09-24 12:30 ` Kevin Wolf [this message]
2012-09-24 22:40 ` ching
2012-09-25 13:33 ` Kevin Wolf
2012-09-25 23:22 ` ching
2012-09-26 7:51 ` Kevin Wolf
2012-09-28 0:00 ` ching
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5060524C.2070509@redhat.com \
--to=kwolf@redhat.com \
--cc=lsching17@gmail.com \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.