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From: Anthony Liguori <anthony@codemonkey.ws>
To: Avi Kivity <avi@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>,
	qemu-devel@nongnu.org,
	Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
	Juan Quintela <quintela@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 1/3] block: allow migration to work with image	files
Date: Sun, 12 Sep 2010 08:06:50 -0500	[thread overview]
Message-ID: <4C8CD06A.7060507@codemonkey.ws> (raw)
In-Reply-To: <4C8CAD7C.5020102@redhat.com>

On 09/12/2010 05:37 AM, Avi Kivity wrote:
>  On 09/11/2010 05:04 PM, Anthony Liguori wrote:
>> Image files have two types of data: immutable data that describes 
>> things like
>> image size, backing files, etc. and mutable data that includes offset 
>> and
>> reference count tables.
>>
>
> Note: even the logical size is, in principle, mutable.  If we 
> introduce external snapshots, then so are backing files?

Maybe it should be, "data the can be changed during a live migration".

Backing files and logical size shouldn't change during live migration.

But even so, I think the interface make sense.  It's basically, drop 
anything you have cached that may change during migration.  What needs 
to be read is dependent on features/format.

Regards,

Anthony Liguori

  reply	other threads:[~2010-09-12 13:20 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-11 14:04 [Qemu-devel] [RFC][PATCH 0/3] Fix caching issues with live migration Anthony Liguori
2010-09-11 14:04 ` [Qemu-devel] [PATCH 1/3] block: allow migration to work with image files Anthony Liguori
2010-09-12 10:37   ` Avi Kivity
2010-09-12 13:06     ` Anthony Liguori [this message]
2010-09-12 13:28       ` Avi Kivity
2010-09-12 15:26         ` Anthony Liguori
2010-09-12 16:06           ` Avi Kivity
2010-09-12 17:10             ` Anthony Liguori
2010-09-12 17:51               ` Avi Kivity
2010-09-15 16:00                 ` [Qemu-devel] " Juan Quintela
2010-09-15 15:57         ` Juan Quintela
2010-09-13  8:21   ` Kevin Wolf
2010-09-13 13:27     ` Anthony Liguori
2010-09-15 16:03     ` Juan Quintela
2010-09-16  7:54       ` Kevin Wolf
2010-09-15 15:53   ` Juan Quintela
2010-09-11 14:04 ` [Qemu-devel] [PATCH 2/3] block-nbd: fix use of protocols in backing files and nbd probing Anthony Liguori
2010-09-11 16:53   ` Stefan Hajnoczi
2010-09-11 17:27     ` Anthony Liguori
2010-09-11 17:45       ` Anthony Liguori
2010-09-15 16:06   ` [Qemu-devel] " Juan Quintela
2010-09-16 15:40     ` Anthony Liguori
2010-09-17  8:53       ` Kevin Wolf
2010-09-16  8:08   ` Kevin Wolf
2010-09-16 13:00     ` Anthony Liguori
2010-09-16 14:08       ` Kevin Wolf
2010-09-11 14:04 ` [Qemu-devel] [PATCH 3/3] disk: don't read from disk until the guest starts Anthony Liguori
2010-09-11 17:24   ` Stefan Hajnoczi
2010-09-11 17:34     ` Anthony Liguori
2010-09-12 10:42   ` Avi Kivity
2010-09-12 13:08     ` Anthony Liguori
2010-09-12 13:26       ` Avi Kivity
2010-09-12 15:29         ` Anthony Liguori
2010-09-12 16:04           ` Avi Kivity
2010-09-15 16:10       ` [Qemu-devel] " Juan Quintela
2010-09-13  8:32   ` Kevin Wolf
2010-09-13 13:29     ` Anthony Liguori
2010-09-13 13:39       ` Kevin Wolf
2010-09-13 13:42         ` Anthony Liguori
2010-09-13 14:13           ` Kevin Wolf
2010-09-13 14:34             ` Anthony Liguori
2010-09-14  9:47               ` Avi Kivity
2010-09-14 12:51                 ` Anthony Liguori
2010-09-14 13:16                   ` Avi Kivity
2010-09-13 19:29             ` Stefan Hajnoczi
2010-09-13 20:03               ` Kevin Wolf
2010-09-13 20:09                 ` Anthony Liguori
2010-09-14  8:28                   ` Kevin Wolf
2010-09-15 16:16     ` Juan Quintela
2010-09-12 10:46 ` [Qemu-devel] [RFC][PATCH 0/3] Fix caching issues with live migration Avi Kivity
2010-09-12 13:12   ` Anthony Liguori

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