From 394918ebb889f99d89db6843bcc93279b2b745f9 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Mon, 8 Mar 2021 11:40:23 -0700 Subject: io_uring: enable use of bio alloc cache Mark polled IO as being safe for dipping into the bio allocation cache, in case the targeted bio_set has it enabled. This brings an IOPOLL gen2 Optane QD=128 workload from ~3.2M IOPS to ~3.5M IOPS. Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe --- fs/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/io_uring.c') diff --git a/fs/io_uring.c b/fs/io_uring.c index 4f5a00707644..504aede8ca47 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2737,7 +2737,7 @@ static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe) !kiocb->ki_filp->f_op->iopoll) return -EOPNOTSUPP; - kiocb->ki_flags |= IOCB_HIPRI; + kiocb->ki_flags |= IOCB_HIPRI | IOCB_ALLOC_CACHE; kiocb->ki_complete = io_complete_rw_iopoll; req->iopoll_completed = 0; } else { -- cgit v1.2.3