From: Paolo Bonzini <pbonzini@redhat.com>
To: Jeff Cody <jcody@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>,
stefanha@redhat.com, qemu-devel@nongnu.org,
qemu-block@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 3/3] block: mirror - zero unallocated target sectors when zero init not present
Date: Wed, 30 Sep 2015 17:16:36 +0200 [thread overview]
Message-ID: <560BFCD4.1060105@redhat.com> (raw)
In-Reply-To: <20150930144350.GB11943@localhost.localdomain>
On 30/09/2015 16:43, Jeff Cody wrote:
> One issue is that QEMU will do mode!='existing' && sync!='full' for
> drivers that do not support backing files (raw host devices, for
> instance).
Yup, this can be used to get a mirror of future operations (the idea was
to support things such as antiviruses, where the antivirus connects to
QEMU via NBD).
I think it's okay to ignore this case, since the resulting image is
bogus anyway. What is interesting is only the stream of writes which
you can get through NBD.
Paolo
next prev parent reply other threads:[~2015-09-30 15:16 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-28 3:29 [Qemu-devel] [PATCH 0/3] block: mirror - Write zeroes for unallocated sectors if no zero init Jeff Cody
2015-09-28 3:29 ` [Qemu-devel] [PATCH 1/3] block: allow creation of detached dirty bitmaps Jeff Cody
2015-09-28 14:41 ` Kevin Wolf
2015-09-28 15:13 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
2015-09-28 16:38 ` Max Reitz
2015-09-28 3:29 ` [Qemu-devel] [PATCH 2/3] block: mirror - split out part of mirror_run() Jeff Cody
2015-09-28 14:17 ` Paolo Bonzini
2015-09-28 14:47 ` Kevin Wolf
2015-09-28 16:50 ` [Qemu-devel] [Qemu-block] " Max Reitz
2015-09-28 3:29 ` [Qemu-devel] [PATCH 3/3] block: mirror - zero unallocated target sectors when zero init not present Jeff Cody
2015-09-28 14:13 ` Paolo Bonzini
2015-09-28 20:31 ` Eric Blake
2015-09-29 8:10 ` Kevin Wolf
2015-09-29 8:42 ` Paolo Bonzini
2015-09-29 9:35 ` Kevin Wolf
2015-09-29 10:52 ` Paolo Bonzini
2015-09-30 14:43 ` Jeff Cody
2015-09-30 15:16 ` Paolo Bonzini [this message]
2015-09-30 15:26 ` Kevin Wolf
2015-09-30 16:02 ` Jeff Cody
2015-09-30 16:06 ` Paolo Bonzini
2015-10-01 8:23 ` Kevin Wolf
2015-09-28 21:32 ` Jeff Cody
2015-09-29 2:48 ` Eric Blake
2015-09-28 15:07 ` Kevin Wolf
2015-09-28 21:57 ` Jeff Cody
2015-09-29 8:28 ` Kevin Wolf
2015-09-28 15:10 ` Kevin Wolf
2015-09-28 21:58 ` Jeff Cody
2015-09-28 15:23 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
2015-09-30 15:11 ` Jeff Cody
2015-09-30 15:28 ` Kevin Wolf
2015-09-28 17:32 ` Max Reitz
2015-09-29 8:39 ` Kevin Wolf
2015-09-29 14:47 ` [Qemu-devel] " Paolo Bonzini
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=560BFCD4.1060105@redhat.com \
--to=pbonzini@redhat.com \
--cc=jcody@redhat.com \
--cc=kwolf@redhat.com \
--cc=qemu-block@nongnu.org \
--cc=qemu-devel@nongnu.org \
--cc=stefanha@redhat.com \
/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).