[PATCH 4/6] block: clear BIO_PERCPU_CACHE flag if polling isn't supported
From: Jens Axboe <axboe@kernel.dk>
Date: 2021-08-12 15:41:57
Also in:
io-uring
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
The bio alloc cache relies on the fact that a polled bio will complete in process context, clear the cacheable flag if we disable polling for a given bio. Signed-off-by: Jens Axboe <axboe@kernel.dk> --- block/blk-core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 04477697ee4b..c130206e9961 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c@@ -833,8 +833,11 @@ static noinline_for_stack bool submit_bio_checks(struct bio *bio) } } - if (!test_bit(QUEUE_FLAG_POLL, &q->queue_flags)) + if (!test_bit(QUEUE_FLAG_POLL, &q->queue_flags)) { + /* can't support alloc cache if we turn off polling */ + bio_clear_flag(bio, BIO_PERCPU_CACHE); bio->bi_opf &= ~REQ_HIPRI; + } switch (bio_op(bio)) { case REQ_OP_DISCARD:
--
2.32.0