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| author | Jens Axboe <axboe@kernel.dk> | 2018-11-08 18:24:07 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-08 18:24:07 +0100 |
| commit | 7baa85727d0406ffd2b2303cd803a145aa35c505 (patch) | |
| tree | 580e8cf709bda194b7271ca9310f11ea0d8b14e3 /block/blk-mq-debugfs.c | |
| parent | loop: Get rid of 'nested' acquisition of loop_ctl_mutex (diff) | |
| download | linux-7baa85727d0406ffd2b2303cd803a145aa35c505.tar.xz linux-7baa85727d0406ffd2b2303cd803a145aa35c505.zip | |
blk-mq-tag: change busy_iter_fn to return whether to continue or not
We have this functionality in sbitmap, but we don't export it in
blk-mq for users of the tags busy iteration. This can be useful
for stopping the iteration, if the caller doesn't need to find
more requests.
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-debugfs.c')
| -rw-r--r-- | block/blk-mq-debugfs.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index cde19be36135..f021f4817b80 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -422,15 +422,18 @@ struct show_busy_params { /* * Note: the state of a request may change while this function is in progress, - * e.g. due to a concurrent blk_mq_finish_request() call. + * e.g. due to a concurrent blk_mq_finish_request() call. Returns true to + * keep iterating requests. */ -static void hctx_show_busy_rq(struct request *rq, void *data, bool reserved) +static bool hctx_show_busy_rq(struct request *rq, void *data, bool reserved) { const struct show_busy_params *params = data; if (rq->mq_hctx == params->hctx) __blk_mq_debugfs_rq_show(params->m, list_entry_rq(&rq->queuelist)); + + return true; } static int hctx_busy_show(void *data, struct seq_file *m) |