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From: Usama Arif <[email protected]>
To: [email protected], [email protected],
	[email protected], [email protected]
Cc: [email protected], Usama Arif <[email protected]>
Subject: [PATCH v5 1/4] io_uring: remove trace for eventfd
Date: Thu,  3 Feb 2022 23:34:36 +0000	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

The information on whether eventfd is registered is not very useful
and would result in the tracepoint being enclosed in an rcu_readlock
in a later patch that tries to avoid ring quiesce for registering
eventfd.

Suggested-by: Jens Axboe <[email protected]>
Signed-off-by: Usama Arif <[email protected]>
---
 fs/io_uring.c                   |  3 +--
 include/trace/events/io_uring.h | 13 +++++--------
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 2e04f718319d..21531609a9c6 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -11171,8 +11171,7 @@ SYSCALL_DEFINE4(io_uring_register, unsigned int, fd, unsigned int, opcode,
 	mutex_lock(&ctx->uring_lock);
 	ret = __io_uring_register(ctx, opcode, arg, nr_args);
 	mutex_unlock(&ctx->uring_lock);
-	trace_io_uring_register(ctx, opcode, ctx->nr_user_files, ctx->nr_user_bufs,
-							ctx->cq_ev_fd != NULL, ret);
+	trace_io_uring_register(ctx, opcode, ctx->nr_user_files, ctx->nr_user_bufs, ret);
 out_fput:
 	fdput(f);
 	return ret;
diff --git a/include/trace/events/io_uring.h b/include/trace/events/io_uring.h
index 7346f0164cf4..098beda7601a 100644
--- a/include/trace/events/io_uring.h
+++ b/include/trace/events/io_uring.h
@@ -57,10 +57,9 @@ TRACE_EVENT(io_uring_create,
  * @opcode:		describes which operation to perform
  * @nr_user_files:	number of registered files
  * @nr_user_bufs:	number of registered buffers
- * @cq_ev_fd:		whether eventfs registered or not
  * @ret:		return code
  *
- * Allows to trace fixed files/buffers/eventfds, that could be registered to
+ * Allows to trace fixed files/buffers, that could be registered to
  * avoid an overhead of getting references to them for every operation. This
  * event, together with io_uring_file_get, can provide a full picture of how
  * much overhead one can reduce via fixing.
@@ -68,16 +67,15 @@ TRACE_EVENT(io_uring_create,
 TRACE_EVENT(io_uring_register,
 
 	TP_PROTO(void *ctx, unsigned opcode, unsigned nr_files,
-			 unsigned nr_bufs, bool eventfd, long ret),
+			 unsigned nr_bufs, long ret),
 
-	TP_ARGS(ctx, opcode, nr_files, nr_bufs, eventfd, ret),
+	TP_ARGS(ctx, opcode, nr_files, nr_bufs, ret),
 
 	TP_STRUCT__entry (
 		__field(  void *,	ctx			)
 		__field(  unsigned,	opcode		)
 		__field(  unsigned,	nr_files	)
 		__field(  unsigned,	nr_bufs		)
-		__field(  bool,		eventfd		)
 		__field(  long,		ret			)
 	),
 
@@ -86,14 +84,13 @@ TRACE_EVENT(io_uring_register,
 		__entry->opcode		= opcode;
 		__entry->nr_files	= nr_files;
 		__entry->nr_bufs	= nr_bufs;
-		__entry->eventfd	= eventfd;
 		__entry->ret		= ret;
 	),
 
 	TP_printk("ring %p, opcode %d, nr_user_files %d, nr_user_bufs %d, "
-			  "eventfd %d, ret %ld",
+			  "ret %ld",
 			  __entry->ctx, __entry->opcode, __entry->nr_files,
-			  __entry->nr_bufs, __entry->eventfd, __entry->ret)
+			  __entry->nr_bufs, __entry->ret)
 );
 
 /**
-- 
2.25.1


  reply	other threads:[~2022-02-03 23:34 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-03 23:34 [PATCH v5 0/4] io_uring: remove ring quiesce in io_uring_register Usama Arif
2022-02-03 23:34 ` Usama Arif [this message]
2022-02-03 23:34 ` [PATCH v5 2/4] io_uring: avoid ring quiesce while registering/unregistering eventfd Usama Arif
2022-02-03 23:46   ` Pavel Begunkov
2022-02-03 23:54     ` Pavel Begunkov
2022-02-04  0:12     ` Jens Axboe
2022-02-03 23:34 ` [PATCH v5 3/4] io_uring: avoid ring quiesce for IORING_REGISTER_EVENTFD_ASYNC Usama Arif
2022-02-03 23:34 ` [PATCH v5 4/4] io_uring: remove ring quiesce for io_uring_register Usama Arif
2022-02-03 23:47   ` Pavel Begunkov
2022-02-04  0:28     ` Pavel Begunkov
2022-02-04  0:02 ` [PATCH v5 0/4] io_uring: remove ring quiesce in io_uring_register Pavel Begunkov
2022-02-04  0:15   ` Jens Axboe
2022-02-04  0:24     ` Pavel Begunkov

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