diff options
author | Fam Zheng <famz@redhat.com> | 2016-02-02 10:12:24 +0800 |
---|---|---|
committer | Stefan Hajnoczi <stefanha@redhat.com> | 2016-02-09 13:52:26 +0000 |
commit | 794f01414f9f4c4d0c6f1961154674961941c197 (patch) | |
tree | a2fb49a44557ac1899e2c37c591a4a5e763edea4 /ioport.c | |
parent | ad523bca56a7202d2498c550a41be5c986c4d33c (diff) |
blockjob: Fix hang in block_job_finish_sync
With a mirror job running on a virtio-blk dataplane disk, sending "q" to
HMP will cause a dead loop in block_job_finish_sync.
This is because the aio_poll() only processes the AIO context of bs
which has no more work to do, while the main loop BH that is scheduled
for setting the job->completed flag is never processed.
Fix this by adding a flag in BlockJob structure, to track which context
to poll for the block job to make progress. Its value is set to true
when block_job_coroutine_complete() is called, and is checked in
block_job_finish_sync to determine which context to poll.
Suggested-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 1454379144-29807-1-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'ioport.c')
0 files changed, 0 insertions, 0 deletions