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authorLinus Torvalds <torvalds@linux-foundation.org>2023-07-22 11:05:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2023-07-22 11:05:15 -0700
commitf036d67c02b6f6966b0d45e9a16c9f2e7ede80a3 (patch)
tree5b8183940408ed9b79203a9055f1389422ce1050 /lib
parentbdd1d82e7d02bd2764a68a5cc54533dfc2ba452a (diff)
parentbb5faa99f0ce40756ab7bbbce4f16c01ca5ebd5a (diff)
Merge tag 'block-6.5-2023-07-21' of git://git.kernel.dk/linux
Pull block fixes from Jens Axboe: - Fix for loop regressions (Mauricio) - Fix a potential stall with batched wakeups in sbitmap (David) - Fix for stall with recursive plug flushes (Ross) - Skip accounting of empty requests for blk-iocost (Chengming) - Remove a dead field in struct blk_mq_hw_ctx (Chengming) * tag 'block-6.5-2023-07-21' of git://git.kernel.dk/linux: loop: do not enforce max_loop hard limit by (new) default loop: deprecate autoloading callback loop_probe() sbitmap: fix batching wakeup blk-iocost: skip empty flush bio in iocost blk-mq: delete dead struct blk_mq_hw_ctx->queued field blk-mq: Fix stall due to recursive flush plug
Diffstat (limited to 'lib')
-rw-r--r--lib/sbitmap.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/lib/sbitmap.c b/lib/sbitmap.c
index eff4e42c425a..d0a5081dfd12 100644
--- a/lib/sbitmap.c
+++ b/lib/sbitmap.c
@@ -550,7 +550,7 @@ EXPORT_SYMBOL_GPL(sbitmap_queue_min_shallow_depth);
static void __sbitmap_queue_wake_up(struct sbitmap_queue *sbq, int nr)
{
- int i, wake_index;
+ int i, wake_index, woken;
if (!atomic_read(&sbq->ws_active))
return;
@@ -567,13 +567,12 @@ static void __sbitmap_queue_wake_up(struct sbitmap_queue *sbq, int nr)
*/
wake_index = sbq_index_inc(wake_index);
- /*
- * It is sufficient to wake up at least one waiter to
- * guarantee forward progress.
- */
- if (waitqueue_active(&ws->wait) &&
- wake_up_nr(&ws->wait, nr))
- break;
+ if (waitqueue_active(&ws->wait)) {
+ woken = wake_up_nr(&ws->wait, nr);
+ if (woken == nr)
+ break;
+ nr -= woken;
+ }
}
if (wake_index != atomic_read(&sbq->wake_index))