From 16850a211c8ee03b25e01da034e43440fbd15f2d Mon Sep 17 00:00:00 2001 From: Stefan Roesch Date: Mon, 25 Apr 2022 11:26:36 -0700 Subject: [PATCH] liburing: return correct ring size for large CQE's Return the correct ring_size when large CQE's are used. Signed-off-by: Stefan Roesch Link: https://lore.kernel.org/r/20220425182639.2446370-4-shr@fb.com Signed-off-by: Jens Axboe --- src/setup.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/setup.c b/src/setup.c index dd6a712a..d2adc7f6 100644 --- a/src/setup.c +++ b/src/setup.c @@ -257,8 +257,11 @@ static size_t rings_size(struct io_uring_params *p, unsigned entries, { size_t pages, sq_size, cq_size; - cq_size = KRING_SIZE; - cq_size += cq_entries * sizeof(struct io_uring_cqe); + cq_size = sizeof(struct io_uring_cqe); + if (p->flags & IORING_SETUP_CQE32) + cq_size += sizeof(struct io_uring_cqe); + cq_size *= cq_entries; + cq_size += KRING_SIZE; cq_size = (cq_size + 63) & ~63UL; pages = (size_t) 1 << npages(cq_size, page_size);