diff options
| author | Ming Lei <ming.lei@redhat.com> | 2023-06-21 16:22:08 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-06-21 16:48:34 +0300 |
| commit | 2293cae703cda162684ae966db6b1b4a11b5e88f (patch) | |
| tree | d37e301832e0d3233580d72dbc98f618bd389ff7 /block/bdev.c | |
| parent | 72ef02b8dfa009029fa713e8a731a92d27d14e35 (diff) | |
| download | linux-2293cae703cda162684ae966db6b1b4a11b5e88f.tar.xz | |
blk-mq: don't insert passthrough request into sw queue
In case of real io scheduler, q->elevator is set, so blk_mq_run_hw_queue()
may just check if scheduler queue has request to dispatch, see
__blk_mq_sched_dispatch_requests(). Then IO hang may be caused because
all passthorugh requests may stay in sw queue.
And any passthrough request should have been inserted to hctx->dispatch
always.
Reported-by: Guangwu Zhang <guazhang@redhat.com>
Fixes: d97217e7f024 ("blk-mq: don't queue plugged passthrough requests into scheduler")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230621132208.1142318-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bdev.c')
0 files changed, 0 insertions, 0 deletions