From 92e42ff6bc6be586b71b7cddaaa14cfe0a4efe47 Mon Sep 17 00:00:00 2001 From: Stefan Roesch Date: Mon, 25 Apr 2022 11:26:35 -0700 Subject: [PATCH] liburing: increase mmap size for large CQE's This doubles the mmap size for large CQE's. Signed-off-by: Stefan Roesch Link: https://lore.kernel.org/r/20220425182639.2446370-3-shr@fb.com Signed-off-by: Jens Axboe --- src/setup.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/setup.c b/src/setup.c index aec8b338..dd6a712a 100644 --- a/src/setup.c +++ b/src/setup.c @@ -21,8 +21,12 @@ static int io_uring_mmap(int fd, struct io_uring_params *p, size_t size; int ret; + size = sizeof(struct io_uring_cqe); + if (p->flags & IORING_SETUP_CQE32) + size += sizeof(struct io_uring_cqe); + sq->ring_sz = p->sq_off.array + p->sq_entries * sizeof(unsigned); - cq->ring_sz = p->cq_off.cqes + p->cq_entries * sizeof(struct io_uring_cqe); + cq->ring_sz = p->cq_off.cqes + p->cq_entries * size; if (p->features & IORING_FEAT_SINGLE_MMAP) { if (cq->ring_sz > sq->ring_sz)