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| author |  Shaohua Li <shli@fb.com>
| 2015-05-01 09:59:44 -0700 |
|---|---|---|
| committer |  Jens Axboe <axboe@fb.com>
| 2015-05-04 13:09:55 -0600 |
| commit | b2387ddcced8de3e6471a2fb16a409577063016f (patch) | |
| tree | bd13a1c05ec6b788aab5d53f855b64adeb1a9fdd /block | |
| parent | block: destroy bdi before blockdev is unregistered. (diff) | |
| download | linux-b2387ddcced8de3e6471a2fb16a409577063016f.tar.gz linux-b2387ddcced8de3e6471a2fb16a409577063016f.tar.bz2 linux-b2387ddcced8de3e6471a2fb16a409577063016f.zip | |
blk-mq: fix FUA request hang
When a FUA request enters its DATA stage of flush pipeline, the
request is added to mq requeue list, the request will then be added to
ctx->rq_list. blk_mq_attempt_merge() might merge the request with a bio.
Later when the request is finished the flush pipeline, the
request->__data_len is 0. Then I only saw the bio gets endio called, the
original request never finish.
Adding REQ_FLUSH_SEQ into REQ_NOMERGE_FLAGS looks an easy fix.
stable: 3.15+
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions