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authorOmar Sandoval <osandov@fb.com>2017-05-04 17:17:21 +0300
committerJens Axboe <axboe@fb.com>2017-05-04 17:24:13 +0300
commit9c1051aacde828073dbbab5e8e59c0fc802efa9a (patch)
treec0e06f43aaf1c1fa908ebe2f196d24a0f42992f5 /block/blk-mq.c
parentd173a25165c124442182f6b21d0c2ec381a0eebe (diff)
downloadlinux-9c1051aacde828073dbbab5e8e59c0fc802efa9a.tar.xz
blk-mq: untangle debugfs and sysfs
Originally, I tied debugfs registration/unregistration together with sysfs. There's no reason to do this, and it's getting in the way of letting schedulers define their own debugfs attributes. Instead, tie the debugfs registration to the lifetime of the structures themselves. The saner lifetimes mean we can also get rid of the extra mq directory and move everything one level up. I.e., nvme0n1/mq/hctx0/tags is now just nvme0n1/hctx0/tags. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.c')
-rw-r--r--block/blk-mq.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 03a747105682..5d4ce7eb8dbf 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -31,6 +31,7 @@
#include <linux/blk-mq.h>
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-debugfs.h"
#include "blk-mq-tag.h"
#include "blk-stat.h"
#include "blk-wbt.h"
@@ -1862,6 +1863,8 @@ static void blk_mq_exit_hctx(struct request_queue *q,
struct blk_mq_tag_set *set,
struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx)
{
+ blk_mq_debugfs_unregister_hctx(hctx);
+
blk_mq_tag_idle(hctx);
if (set->ops->exit_request)
@@ -1948,6 +1951,8 @@ static int blk_mq_init_hctx(struct request_queue *q,
if (hctx->flags & BLK_MQ_F_BLOCKING)
init_srcu_struct(&hctx->queue_rq_srcu);
+ blk_mq_debugfs_register_hctx(q, hctx);
+
return 0;
free_fq:
@@ -2385,6 +2390,7 @@ static void blk_mq_queue_reinit(struct request_queue *q,
{
WARN_ON_ONCE(!atomic_read(&q->mq_freeze_depth));
+ blk_mq_debugfs_unregister_hctxs(q);
blk_mq_sysfs_unregister(q);
/*
@@ -2396,6 +2402,7 @@ static void blk_mq_queue_reinit(struct request_queue *q,
blk_mq_map_swqueue(q, online_mask);
blk_mq_sysfs_register(q);
+ blk_mq_debugfs_register_hctxs(q);
}
/*