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librbd: potential assertion failure during cache read #6348

Merged
2 commits merged into from Oct 23, 2015
Merged

librbd: potential assertion failure during cache read #6348

2 commits merged into from Oct 23, 2015

Commits on Oct 22, 2015

  1. tests: reproduce crash during read-induced CoW 

    Signed-off-by: Jason Dillaman <dillaman@redhat.com>
(cherry picked from commit 382219b)
    Jason Dillaman committed Oct 22, 2015
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  2. librbd: potential assertion failure during cache read 

    It's possible for a cache read from a clone to trigger a writeback if a
previous read op determined the object doesn't exist in the clone,
followed by a cached write to the non-existent clone object, followed
by another read request to the same object.  This causes the cache to
flush the pending writeback ops while not holding the owner lock.

Fixes: ceph#13559
Backport: hammer
Signed-off-by: Jason Dillaman <dillaman@redhat.com>
(cherry picked from commit 4692c33)
    Jason Dillaman committed Oct 22, 2015
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    d3abcbe View commit details
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