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| author | Kevin Wolf <kwolf@redhat.com> | 2020-01-28 16:09:28 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2020-02-18 10:53:56 +0100 |
| commit | 7e6c4ff792734e196c8ca82564c56b5e7c6288ca (patch) | |
| tree | a63eacfc9babc8c12024460cd035f1d15c61466b /block/aio_task.c | |
| parent | eed325b92c3e68417121ea23f96e33af6a4654ed (diff) | |
| download | qemu-7e6c4ff792734e196c8ca82564c56b5e7c6288ca.zip | |
mirror: Don't let an operation wait for itself
mirror_wait_for_free_in_flight_slot() just picks a random operation to
wait for. However, when mirror_co_read() waits for free slots, its
MirrorOp is already in s->ops_in_flight, so if not enough slots are
immediately available, an operation can end up waiting for itself to
complete, which results in a hang.
Fix this by passing the current MirrorOp and skipping this operation
when picking an operation to wait for.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1794692
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'block/aio_task.c')
0 files changed, 0 insertions, 0 deletions