Am 02.09.2015 um 16:18 hat Stefan Hajnoczi geschrieben:
> On Wed, Aug 19, 2015 at 10:54:44AM +0800, Wen Congyang wrote:
> > We will copy data in before_write_notifier to do backup.
> > It is a nested I/O request, so we cannot do copy-on-read.
> >
> > Signed-off-by: Wen Congyang
On Wed, Aug 19, 2015 at 10:54:44AM +0800, Wen Congyang wrote:
> We will copy data in before_write_notifier to do backup.
> It is a nested I/O request, so we cannot do copy-on-read.
>
> Signed-off-by: Wen Congyang
> ---
> block/backup.c| 19 +--
>
On Wed, Aug 19, 2015 at 01:43:41PM +0800, Wen Congyang wrote:
On 08/19/2015 01:41 PM, Paolo Bonzini wrote:
On 18/08/2015 19:54, Wen Congyang wrote:
We will copy data in before_write_notifier to do backup.
It is a nested I/O request, so we cannot do copy-on-read.
Can you explain why?
On 08/20/2015 01:02 AM, Jeff Cody wrote:
On Wed, Aug 19, 2015 at 01:43:41PM +0800, Wen Congyang wrote:
On 08/19/2015 01:41 PM, Paolo Bonzini wrote:
On 18/08/2015 19:54, Wen Congyang wrote:
We will copy data in before_write_notifier to do backup.
It is a nested I/O request, so we cannot do
We will copy data in before_write_notifier to do backup.
It is a nested I/O request, so we cannot do copy-on-read.
Signed-off-by: Wen Congyang we...@cn.fujitsu.com
---
block/backup.c| 19 +--
block/io.c| 11 ++-
include/block/block.h | 3 +++
On 18/08/2015 19:54, Wen Congyang wrote:
We will copy data in before_write_notifier to do backup.
It is a nested I/O request, so we cannot do copy-on-read.
Can you explain why? What is the bug that this is fixing?
Paolo
Signed-off-by: Wen Congyang we...@cn.fujitsu.com