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From: Stefan Roesch <shr@fb.com>
To: <io-uring@vger.kernel.org>, <kernel-team@fb.com>
Cc: <shr@fb.com>
Subject: [PATCH v2 2/6] liburing: increase mmap size for large CQE's
Date: Wed, 20 Apr 2022 12:15:20 -0700	[thread overview]
Message-ID: <20220420191524.2906409-3-shr@fb.com> (raw)
In-Reply-To: <20220420191524.2906409-1-shr@fb.com>

This doubles the mmap size for large CQE's.

Signed-off-by: Stefan Roesch <shr@fb.com>
---
 src/setup.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/setup.c b/src/setup.c
index aec8b33..dd6a712 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)
-- 
2.30.2


  parent reply	other threads:[~2022-04-20 19:15 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-20 19:15 [PATCH v2 0/6] liburing: add support for large CQE sizes Stefan Roesch
2022-04-20 19:15 ` [PATCH v2 1/6] liburing: Update io_uring.h with large CQE kernel changes Stefan Roesch
2022-04-20 19:15 ` Stefan Roesch [this message]
2022-04-20 19:15 ` [PATCH v2 3/6] liburing: return correct ring size for large CQE's Stefan Roesch
2022-04-20 19:15 ` [PATCH v2 4/6] liburing: index large CQE's correctly Stefan Roesch
2022-04-20 19:15 ` [PATCH v2 5/6] liburing: add large CQE tests to nop test Stefan Roesch
2022-04-20 19:15 ` [PATCH v2 6/6] liburing: Test all configurations with NOP test Stefan Roesch
2022-04-20 22:45 ` [PATCH v2 0/6] liburing: add support for large CQE sizes Jens Axboe

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