From: Avi Kivity <avi@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: hch@lst.de, Alexander Graf <agraf@suse.de>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: [PATCH 2/2] Add flush=off parameter to -drive
Date: Tue, 11 May 2010 22:04:28 +0300 [thread overview]
Message-ID: <4BE9AA3C.5040108@redhat.com> (raw)
In-Reply-To: <4BE91708.7050307@redhat.com>
On 05/11/2010 11:36 AM, Kevin Wolf wrote:
> Am 10.05.2010 23:51, schrieb Alexander Graf:
>
>> Usually the guest can tell the host to flush data to disk. In some cases we
>> don't want to flush though, but try to keep everything in cache.
>>
>> So let's add a new parameter to -drive that allows us to set the flushing
>> behavior to "on" or "off", defaulting to enabling the guest to flush.
>>
>> Signed-off-by: Alexander Graf<agraf@suse.de>
>>
> What about another cache=... value instead of adding more options? I'm
> quite sure you'll only ever need this with writeback caching. So we
> could have cache=none|writethrough|writeback|wb-noflush or something
> like that.
>
I implemented this once and promptly forgot about it, as cache=volatile.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
next prev parent reply other threads:[~2010-05-11 19:04 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-10 21:51 [Qemu-devel] [PATCH 0/2] Enable qemu block layer to not flush Alexander Graf
2010-05-10 21:51 ` [Qemu-devel] [PATCH 1/2] Add no-op aio emulation stub Alexander Graf
2010-05-10 21:51 ` [Qemu-devel] [PATCH 2/2] Add flush=off parameter to -drive Alexander Graf
2010-05-11 8:36 ` [Qemu-devel] " Kevin Wolf
2010-05-11 10:55 ` Christoph Hellwig
2010-05-11 12:15 ` Paul Brook
2010-05-11 12:43 ` Anthony Liguori
2010-05-11 13:12 ` Paul Brook
2010-05-11 13:20 ` Anthony Liguori
2010-05-11 13:50 ` Paul Brook
2010-05-11 15:40 ` Anthony Liguori
2010-05-11 15:53 ` Paul Brook
2010-05-11 17:09 ` Anthony Liguori
2010-05-11 22:33 ` Paul Brook
2010-05-11 19:11 ` Avi Kivity
2010-05-11 16:32 ` Jamie Lokier
2010-05-11 17:15 ` Anthony Liguori
2010-05-11 18:13 ` Jamie Lokier
2010-05-11 15:18 ` Alexander Graf
2010-05-11 18:20 ` Jamie Lokier
2010-05-11 21:58 ` Paul Brook
2010-05-11 22:11 ` Paul Brook
2010-05-12 10:09 ` Jamie Lokier
2010-05-17 12:40 ` Christoph Hellwig
2010-05-14 9:16 ` Markus Armbruster
2010-05-17 12:41 ` Christoph Hellwig
2010-05-17 12:42 ` Alexander Graf
2010-05-11 19:04 ` Avi Kivity [this message]
2010-05-12 15:05 ` Alexander Graf
2010-05-12 15:36 ` Kevin Wolf
2010-05-12 15:51 ` Alexander Graf
2010-05-11 6:18 ` [Qemu-devel] [PATCH 1/2] Add no-op aio emulation stub Stefan Hajnoczi
2010-05-11 8:29 ` [Qemu-devel] " Kevin Wolf
2010-05-10 21:59 ` [Qemu-devel] [PATCH 0/2] Enable qemu block layer to not flush Anthony Liguori
2010-05-10 22:03 ` Alexander Graf
2010-05-10 22:12 ` Anthony Liguori
2010-05-11 21:48 ` Jamie Lokier
2010-05-12 8:51 ` Stefan Hajnoczi
2010-05-12 9:42 ` Jamie Lokier
2010-05-12 10:43 ` Stefan Hajnoczi
2010-05-12 12:50 ` Jamie Lokier
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=4BE9AA3C.5040108@redhat.com \
--to=avi@redhat.com \
--cc=agraf@suse.de \
--cc=hch@lst.de \
--cc=kwolf@redhat.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.