diff options
| author | Omar Sandoval <osandov@fb.com> | 2017-05-04 08:24:40 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-05-04 08:24:40 -0600 |
| commit | d332ce091813d11a46144354baa72b755833392f (patch) | |
| tree | c6f567b7ffea6dc4abf66cd49e2f94d7a9a49410 /block/blk-mq-sched.c | |
| parent | 9c1051aacde828073dbbab5e8e59c0fc802efa9a (diff) | |
| download | linux-d332ce091813d11a46144354baa72b755833392f.tar.gz | |
blk-mq-debugfs: allow schedulers to register debugfs attributes
This provides the infrastructure for schedulers to expose their internal state through debugfs. We add a list of queue attributes and a list of hctx attributes to struct elevator_type and wire them up when switching schedulers. Signed-off-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Add missing seq_file.h header in blk-mq-debugfs.h Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-sched.c')
| -rw-r--r-- | block/blk-mq-sched.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index e79e9f18d7c2..1f5b692526ae 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -11,6 +11,7 @@ #include "blk.h" #include "blk-mq.h" +#include "blk-mq-debugfs.h" #include "blk-mq-sched.h" #include "blk-mq-tag.h" #include "blk-wbt.h" @@ -472,6 +473,8 @@ int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx, } } + blk_mq_debugfs_register_sched_hctx(q, hctx); + return 0; } @@ -483,6 +486,8 @@ void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx, if (!e) return; + blk_mq_debugfs_unregister_sched_hctx(hctx); + if (e->type->ops.mq.exit_hctx && hctx->sched_data) { e->type->ops.mq.exit_hctx(hctx, hctx_idx); hctx->sched_data = NULL; @@ -519,8 +524,10 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) if (ret) goto err; - if (e->ops.mq.init_hctx) { - queue_for_each_hw_ctx(q, hctx, i) { + blk_mq_debugfs_register_sched(q); + + queue_for_each_hw_ctx(q, hctx, i) { + if (e->ops.mq.init_hctx) { ret = e->ops.mq.init_hctx(hctx, i); if (ret) { eq = q->elevator; @@ -529,6 +536,7 @@ int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e) return ret; } } + blk_mq_debugfs_register_sched_hctx(q, hctx); } return 0; @@ -544,14 +552,14 @@ void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e) struct blk_mq_hw_ctx *hctx; unsigned int i; - if (e->type->ops.mq.exit_hctx) { - queue_for_each_hw_ctx(q, hctx, i) { - if (hctx->sched_data) { - e->type->ops.mq.exit_hctx(hctx, i); - hctx->sched_data = NULL; - } + queue_for_each_hw_ctx(q, hctx, i) { + blk_mq_debugfs_unregister_sched_hctx(hctx); + if (e->type->ops.mq.exit_hctx && hctx->sched_data) { + e->type->ops.mq.exit_hctx(hctx, i); + hctx->sched_data = NULL; } } + blk_mq_debugfs_unregister_sched(q); if (e->type->ops.mq.exit_sched) e->type->ops.mq.exit_sched(e); blk_mq_sched_tags_teardown(q); |