diff options
| author | Ming Lei <[email protected]> | 2019-01-15 11:59:52 +0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2019-01-15 16:29:57 +1200 |
| commit | fe76fc6aaf538df27708ffa3e5d549a6c8e16142 (patch) | |
| tree | 4fda8ebbcb82694899a476026684951e25d9b853 /net/lapb/lapb_in.c | |
| parent | 3719876809e745b9db5293d418600c194bbf5c23 (diff) | |
sbitmap: Protect swap_lock from hardirq
Because we may call blk_mq_get_driver_tag() directly from
blk_mq_dispatch_rq_list() without holding any lock, then HARDIRQ may
come and the above DEADLOCK is triggered.
Commit ab53dcfb3e7b ("sbitmap: Protect swap_lock from hardirq") tries to
fix this issue by using 'spin_lock_bh', which isn't enough because we
complete request from hardirq context direclty in case of multiqueue.
Cc: Clark Williams <[email protected]>
Fixes: ab53dcfb3e7b ("sbitmap: Protect swap_lock from hardirq")
Cc: Jens Axboe <[email protected]>
Cc: Ming Lei <[email protected]>
Cc: Guenter Roeck <[email protected]>
Cc: Steven Rostedt (VMware) <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'net/lapb/lapb_in.c')
0 files changed, 0 insertions, 0 deletions