From: "Denis V. Lunev" <den@virtuozzo.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
qemu-devel@nongnu.org, qemu-block@nongnu.org,
nbd-general@lists.sourceforge.net, alex@alex.org.uk,
eblake@redhat.com, kwolf@redhat.com, stefanha@redhat.com,
w@uter.be
Subject: Re: [Qemu-devel] [PATCH] proto: add 'shift' extension.
Date: Tue, 27 Sep 2016 16:46:29 +0300 [thread overview]
Message-ID: <6508b339-8547-b444-a02e-0d24b3ea5692@virtuozzo.com> (raw)
In-Reply-To: <2133222015.3059876.1474978044995.JavaMail.zimbra@redhat.com>
On 09/27/2016 03:07 PM, Paolo Bonzini wrote:
>
> ----- Original Message -----
>> From: "Denis V. Lunev" <den@virtuozzo.com>
>> To: "Paolo Bonzini" <pbonzini@redhat.com>
>> Cc: "Vladimir Sementsov-Ogievskiy" <vsementsov@virtuozzo.com>, qemu-devel@nongnu.org, qemu-block@nongnu.org,
>> nbd-general@lists.sourceforge.net, alex@alex.org.uk, eblake@redhat.com, kwolf@redhat.com, stefanha@redhat.com,
>> w@uter.be
>> Sent: Tuesday, September 27, 2016 12:25:54 PM
>> Subject: Re: [PATCH] proto: add 'shift' extension.
>>
>> On 09/27/2016 01:15 PM, Paolo Bonzini wrote:
>>>> We could go in a different direction and export flag
>>>> 'has_zero_init' which will report that the storage is
>>>> initialized with all zeroes at the moment. In this
>>>> case mirroring code will not fall into this
>>>> branch.
>>> Why don't you add the zero_init flag to QEMU's NBD driver instead?
>> for all cases without knowing real backend on the server side?
>> I think this would be wrong.
> Add it to the command line, and leave it to libvirt or the user to
> pass "-drive file.driver=nbd,...,file.zero-init=on".
>
> Paolo
this specifically means that all QMP commands like 'drive-backup' and
'drive-mirror' will have to be modified to pass this attribute. If this is
OK, we can proceed with that.
Den
prev parent reply other threads:[~2016-09-27 17:22 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-26 12:46 [Qemu-devel] [PATCH] proto: add 'shift' extension Vladimir Sementsov-Ogievskiy
2016-09-26 12:51 ` Paolo Bonzini
2016-09-26 13:53 ` Vladimir Sementsov-Ogievskiy
2016-09-26 13:54 ` Paolo Bonzini
2016-09-26 14:06 ` Alex Bligh
2016-09-26 20:35 ` Eric Blake
2016-09-26 14:05 ` Alex Bligh
2016-09-26 20:21 ` Eric Blake
2016-09-26 23:41 ` [Qemu-devel] [Nbd] " Wouter Verhelst
2016-09-27 7:36 ` Alex Bligh
2016-09-27 9:43 ` [Qemu-devel] " Denis V. Lunev
2016-09-27 10:15 ` Paolo Bonzini
2016-09-27 10:25 ` Denis V. Lunev
2016-09-27 12:07 ` Paolo Bonzini
2016-09-27 13:28 ` Denis V. Lunev
2016-09-27 17:04 ` Paolo Bonzini
2016-09-27 18:59 ` Denis V. Lunev
2016-09-28 8:34 ` Kevin Wolf
2016-09-28 8:37 ` Denis V. Lunev
2016-09-28 8:56 ` Kevin Wolf
2016-09-28 9:00 ` Vladimir Sementsov-Ogievskiy
2016-09-28 9:32 ` Kevin Wolf
2016-09-27 13:46 ` Denis V. Lunev [this message]
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