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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).