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author	Ilya Dryomov <idryomov@gmail.com>
	Thu, 13 May 2021 11:11:57 +0000 (13:11 +0200)
committer	Ilya Dryomov <idryomov@gmail.com>
	Sat, 15 May 2021 16:48:22 +0000 (18:48 +0200)
commit	fe757401ada7bfd6784b6f9ca5556e1459df7a69
tree	da84988400fb0d3c1ae1ec2a8214821eceaefb75	tree \| snapshot
parent	cb9b3afd87a28e96d3688e1c73900d8043fac6cc	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>

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

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