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| author | Ming Lei <[email protected]> | 2023-06-21 13:22:08 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2023-06-21 13:48:34 +0000 |
| commit | 2293cae703cda162684ae966db6b1b4a11b5e88f (patch) | |
| tree | d37e301832e0d3233580d72dbc98f618bd389ff7 /fs/btrfs/dev-replace.c | |
| parent | bsg: make bsg_class a static const structure (diff) | |
| download | kernel-2293cae703cda162684ae966db6b1b4a11b5e88f.tar.gz kernel-2293cae703cda162684ae966db6b1b4a11b5e88f.zip | |
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 <[email protected]>
Fixes: d97217e7f024 ("blk-mq: don't queue plugged passthrough requests into scheduler")
Signed-off-by: Ming Lei <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'fs/btrfs/dev-replace.c')
0 files changed, 0 insertions, 0 deletions