Commit be863b9e authored by Jens Axboe's avatar Jens Axboe
Browse files

block: clear BIO_PERCPU_CACHE flag if polling isn't supported 



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.

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent be4d234d

block/blk-core.c

+4 −1
Original line number Diff line number Diff line
@@ -832,8 +832,11 @@ 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: