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author	Ilya Dryomov <idryomov@gmail.com>
	Thu, 13 May 2021 11:11:57 +0000 (13:11 +0200)
committer	Deepika Upadhyay <dupadhya@redhat.com>
	Fri, 5 Nov 2021 09:22:01 +0000 (14:52 +0530)
commit	24a30a83491b2002914806a29a2a26448d1e4a4e
tree	3b4b93588213bccd14f8658fb3225c9bd6471443	tree \| snapshot
parent	3003c556e54299e5f9a4a9358789302d62566538	commit \| diff

librbd/cache/pwl/ssd: persist correct write_data_pos

WriteLogCacheEntry gets appended to persist_log_entries before
write_data_pos is updated with the actual media offset. Because
push_back() makes a copy, the updated write_data_pos value never
makes it to media, making recovery impossible.

Fixes: https://tracker.ceph.com/issues/50669
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
(cherry picked from commit fe757401ada7bfd6784b6f9ca5556e1459df7a69)

src/librbd/cache/pwl/ssd/WriteLog.cc

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