From: Dylan Yudaken <dylany@fb.com>
To: <io-uring@vger.kernel.org>
Cc: <axboe@kernel.dk>, <asml.silence@gmail.com>,
<linux-kernel@vger.kernel.org>, <kernel-team@fb.com>,
Dylan Yudaken <dylany@fb.com>
Subject: [PATCH 2/6] io_uring: trace cqe overflows
Date: Thu, 21 Apr 2022 02:13:41 -0700 [thread overview]
Message-ID: <20220421091345.2115755-3-dylany@fb.com> (raw)
In-Reply-To: <20220421091345.2115755-1-dylany@fb.com>
Trace cqe overflows in io_uring. Print ocqe before the check, so if it is
NULL it indicates that it has been dropped.
Signed-off-by: Dylan Yudaken <dylany@fb.com>
---
fs/io_uring.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 7e1d5243bbbc..d654faffa486 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2107,6 +2107,7 @@ static bool io_cqring_event_overflow(struct io_ring_ctx *ctx, u64 user_data,
struct io_overflow_cqe *ocqe;
ocqe = kmalloc(sizeof(*ocqe), GFP_ATOMIC | __GFP_ACCOUNT);
+ trace_io_uring_cqe_overflow(ctx, user_data, res, cflags, ocqe);
if (!ocqe) {
/*
* If we're in ring overflow flush mode, or in task cancel mode,
--
2.30.2
next prev parent reply other threads:[~2022-04-21 9:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-21 9:13 [PATCH 0/6] return an error when cqe is dropped Dylan Yudaken
2022-04-21 9:13 ` [PATCH 1/6] io_uring: add trace support for CQE overflow Dylan Yudaken
2022-04-21 9:13 ` Dylan Yudaken [this message]
2022-04-21 9:13 ` [PATCH 3/6] io_uring: rework io_uring_enter to simplify return value Dylan Yudaken
2022-04-21 9:13 ` [PATCH 4/6] io_uring: use constants for cq_overflow bitfield Dylan Yudaken
2022-04-21 9:13 ` [PATCH 5/6] io_uring: return an error when cqe is dropped Dylan Yudaken
2022-04-21 9:13 ` [PATCH 6/6] io_uring: allow NOP opcode in IOPOLL mode Dylan Yudaken
2022-04-21 23:33 ` Jens Axboe
2022-04-22 9:58 ` Dylan Yudaken
2022-04-21 19:45 ` [PATCH 0/6] return an error when cqe is dropped Jens Axboe
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