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From: | Max Reitz |
Subject: | Re: [Qemu-devel] [PATCH v6 13/13] block/mirror: Block "device IO" during mirror exit |
Date: | Sat, 23 May 2015 19:21:28 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
On 21.05.2015 08:43, Fam Zheng wrote:
When mirror should complete, the source and target are in sync. But we call bdrv_swap() only a while later in the main loop bh. If the guest writes something before that, target will not get the new data. Block "device IO" before bdrv_drain and unblock it after bdrw_swap(). Reported-by: Wen Congyang <address@hidden> Signed-off-by: Fam Zheng <address@hidden> --- block/mirror.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
Reviewed-by: Max Reitz <address@hidden>
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