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[Qemu-block] [PATCH 0/3] potentially broken drive-mirror/drive-backup in

From: Denis V. Lunev
Subject: [Qemu-block] [PATCH 0/3] potentially broken drive-mirror/drive-backup in bdrv_co_discard
Date: Thu, 16 Jun 2016 09:58:04 +0300

Actually I have found this problem running iotest 132 for active async
mirror I have sent yesturday. Anyway, the problem is actual for current
backup/mirror implementation.

bdrv_co_discard must mark areas dirty after writing zeroes, it must call
before_write_notifier chain to push underlying data to backup and it also
must properly fill tracked request information.

Signed-off-by: Denis V. Lunev <address@hidden>
CC: Vladimir Sementsov-Ogievskiy<address@hidden>
CC: Stefan Hajnoczi <address@hidden>
CC: Fam Zheng <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Max Reitz <address@hidden>

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