From: David Howells <dhowells@redhat.com>
To: torvalds@linux-foundation.org
Cc: dhowells@redhat.com, Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Peter Zijlstra <peterz@infradead.org>,
nicolas.dichtel@6wind.com, raven@themaw.net,
Christian Brauner <christian@brauner.io>,
dhowells@redhat.com, keyrings@vger.kernel.org,
linux-usb@vger.kernel.org, linux-block@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [RFC PATCH 09/11] pipe: Remove redundant wakeup from pipe_write() [ver #3]
Date: Fri, 01 Nov 2019 17:35:24 +0000 [thread overview]
Message-ID: <157262972442.13142.11480420475866936493.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <157262963995.13142.5568934007158044624.stgit@warthog.procyon.org.uk>
Remove a redundant wakeup from pipe_write().
Signed-off-by: David Howells <dhowells@redhat.com>
---
fs/pipe.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/fs/pipe.c b/fs/pipe.c
index ce77ac0d8901..d7b8d3f22987 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -517,11 +517,6 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from)
ret = -ERESTARTSYS;
break;
}
- if (do_wakeup) {
- wake_up_interruptible_sync_poll(&pipe->wait, EPOLLIN | EPOLLRDNORM);
- kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN);
- do_wakeup = 0;
- }
pipe->waiting_writers++;
pipe_wait(pipe);
pipe->waiting_writers--;
next prev parent reply other threads:[~2019-11-01 17:35 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-01 17:34 [RFC PATCH 00/11] pipe: Notification queue preparation [ver #3] David Howells
2019-11-01 17:34 ` [RFC PATCH 01/11] pipe: Reduce #inclusion of pipe_fs_i.h " David Howells
2019-11-01 17:34 ` [RFC PATCH 02/11] Remove the nr_exclusive argument from __wake_up_sync_key() " David Howells
2019-11-01 17:34 ` [RFC PATCH 03/11] Add wake_up_interruptible_sync_poll_locked() " David Howells
2019-11-01 17:34 ` [RFC PATCH 04/11] pipe: Use head and tail pointers for the ring, not cursor and length " David Howells
2019-11-07 9:03 ` [pipe] d60337eff1: phoronix-test-suite.noise-level.0.activity_level 144.0% improvement lkp report check
2019-11-07 16:51 ` Linus Torvalds
2019-11-07 17:42 ` David Howells
2019-11-10 3:13 ` [pipe] d60337eff1: BUG:kernel_NULL_pointer_dereference,address kernel test robot
2019-11-15 13:28 ` David Howells
2019-11-15 16:22 ` David Howells
2019-11-18 7:53 ` [LKP] " kernel test robot
2019-11-01 17:34 ` [RFC PATCH 05/11] pipe: Allow pipes to have kernel-reserved slots [ver #3] David Howells
2019-11-01 17:34 ` [RFC PATCH 06/11] pipe: Advance tail pointer inside of wait spinlock in pipe_read() " David Howells
2019-11-01 17:35 ` [RFC PATCH 07/11] pipe: Conditionalise wakeup " David Howells
2019-11-01 17:35 ` [RFC PATCH 08/11] pipe: Rearrange sequence in pipe_write() to preallocate slot " David Howells
2019-11-01 17:35 ` David Howells [this message]
2019-11-01 17:35 ` [RFC PATCH 10/11] pipe: Check for ring full inside of the spinlock in pipe_write() " David Howells
2019-11-01 17:35 ` [RFC PATCH 11/11] pipe: Increase the writer-wakeup threshold to reduce context-switch count " David Howells
2019-11-01 19:24 ` [RFC PATCH 00/11] pipe: Notification queue preparation " Linus Torvalds
2019-11-01 22:05 ` David Howells
2019-11-01 22:12 ` Linus Torvalds
2019-11-05 16:02 ` Details on the UAPI of implementing notifications on pipes David Howells
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