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| author |   Jens Axboe <axboe@fb.com> | 2017-01-26 12:50:36 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-27 08:20:31 -0700 |
| commit | 3c782d67c16889d753a79a8da5422c583d7cfd51 (patch) | |
| tree | a34fce71ed855738dd53b3e66594446a23df7319 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | blk-mq: improve scheduler queue sync/async running (diff) | |
| download | wireguard-linux-3c782d67c16889d753a79a8da5422c583d7cfd51.tar.xz wireguard-linux-3c782d67c16889d753a79a8da5422c583d7cfd51.zip | |
blk-mq: fix potential race in queue restart and driver tag allocation
Once we mark the queue as needing a restart, re-check if we can
get a driver tag. This fixes a theoretical issue where the needed
IO completes _after_ blk_mq_get_driver_tag() fails, but before we
manage to set the restart bit.
Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Tested-by: Hannes Reinecke <hare@suse.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions