From: Kevin Wolf <kwolf@redhat.com>
To: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 3/8] qed: add support for Copy-on-Read
Date: Fri, 29 Apr 2011 14:14:10 +0200 [thread overview]
Message-ID: <4DBAAB92.1040700@redhat.com> (raw)
In-Reply-To: <1303910855-28999-4-git-send-email-stefanha@linux.vnet.ibm.com>
Am 27.04.2011 15:27, schrieb Stefan Hajnoczi:
> From: Anthony Liguori <aliguori@us.ibm.com>
>
> When creating an image using qemu-img, just pass '-o copy_on_read' and then
> whenever QED reads from a backing file, it will write the block to the QED
> file after the read completes ensuring that you only fetch from the backing
> device once.
As discussed previously, this is not the right primary interface.
Also, the patch still seems to be broken with respect to concurrent writes.
Kevin
next prev parent reply other threads:[~2011-04-29 12:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-27 13:27 [Qemu-devel] [RFC PATCH 0/8] QED image streaming Stefan Hajnoczi
2011-04-27 13:27 ` [Qemu-devel] [PATCH 1/8] block: add bdrv_aio_stream Stefan Hajnoczi
2011-04-29 11:56 ` Kevin Wolf
2011-05-06 13:21 ` Stefan Hajnoczi
2011-05-06 13:36 ` Kevin Wolf
2011-05-06 15:47 ` Stefan Hajnoczi
2011-04-27 13:27 ` [Qemu-devel] [PATCH 2/8] qmp: Add QMP support for stream commands Stefan Hajnoczi
2011-04-29 12:09 ` Kevin Wolf
2011-05-06 13:23 ` Stefan Hajnoczi
2011-04-27 13:27 ` [Qemu-devel] [PATCH 3/8] qed: add support for Copy-on-Read Stefan Hajnoczi
2011-04-27 14:29 ` Paolo Bonzini
2011-04-29 12:14 ` Kevin Wolf [this message]
2011-05-06 13:24 ` Stefan Hajnoczi
2011-04-27 13:27 ` [Qemu-devel] [PATCH 4/8] qed: intelligent streaming implementation Stefan Hajnoczi
2011-04-27 13:27 ` [Qemu-devel] [PATCH 5/8] qed: detect zero writes and skip them when to an unalloc cluster Stefan Hajnoczi
2011-04-27 13:27 ` [Qemu-devel] [PATCH 6/8] blockdev: Allow image files to auto-enable streaming Stefan Hajnoczi
2011-04-29 12:20 ` Kevin Wolf
2011-04-27 13:27 ` [Qemu-devel] [PATCH 7/8] qed: Add QED_CF_STREAM flag " Stefan Hajnoczi
2011-04-27 13:27 ` [Qemu-devel] [PATCH 8/8] qed: Add -o stream=on image creation option Stefan Hajnoczi
2011-04-27 13:41 ` [Qemu-devel] [RFC PATCH 0/8] QED image streaming Stefan Hajnoczi
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