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authorJens Axboe <axboe@kernel.dk>2021-11-14 00:03:26 +0300
committerJens Axboe <axboe@kernel.dk>2021-11-29 16:38:35 +0300
commit48b5c1fbcd8c5bc6b91a56399a5257b801391dd8 (patch)
treeca7326ec1b162e4e8cc3701ea620b6b13012798b /block/blk-stat.h
parent25c4b5e058578066db56d757ad3a7adeaff35856 (diff)
downloadlinux-48b5c1fbcd8c5bc6b91a56399a5257b801391dd8.tar.xz
block: only allocate poll_stats if there's a user of them
This is essentially never used, yet it's about 1/3rd of the total queue size. Allocate it when needed, and don't embed it in the queue. Kill the queue flag for this while at it, since we can just check the assigned pointer now. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-stat.h')
-rw-r--r--block/blk-stat.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-stat.h b/block/blk-stat.h
index 17b47a86eefb..58f029af49e5 100644
--- a/block/blk-stat.h
+++ b/block/blk-stat.h
@@ -64,6 +64,7 @@ struct blk_stat_callback {
struct blk_queue_stats *blk_alloc_queue_stats(void);
void blk_free_queue_stats(struct blk_queue_stats *);
+bool blk_stats_alloc_enable(struct request_queue *q);
void blk_stat_add(struct request *rq, u64 now);