Amir Goldstein 082fd1ea1f fsnotify: optimize the case of no parent watcher ... If parent inode is not watching, check for the event in masks of sb/mount/inode masks early to optimize out most of the code in __fsnotify_parent() and avoid calling fsnotify(). Jens has reported that this optimization improves BW and IOPS in an io_uring benchmark by more than 10% and reduces perf reported CPU usage. before: + 4.51% io_uring [kernel.vmlinux] [k] fsnotify + 3.67% io_uring [kernel.vmlinux] [k] __fsnotify_parent after: + 2.37% io_uring [kernel.vmlinux] [k] __fsnotify_parent Reported-and-tested-by: Jens Axboe <axboe@kernel.dk> Link: https://lore.kernel.org/linux-fsdevel/b45bd8ff-5654-4e67-90a6-aad5e6759e0b@kernel.dk/ Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz> Message-Id: <20240116113247.758848-1-amir73il@gmail.com>		2024-01-24 16:26:03 +01:00
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dnotify	fs: Remove the now superfluous sentinel elements from ctl_table array	2023-12-28 04:57:57 -08:00
fanotify	sysctl-6.8-rc1	2024-01-10 17:44:36 -08:00
inotify	fs: Remove the now superfluous sentinel elements from ctl_table array	2023-12-28 04:57:57 -08:00
fdinfo.c	exportfs: add explicit flag to request non-decodeable file handles	2023-05-22 18:08:37 +02:00
fdinfo.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
fsnotify.c	fsnotify: optimize the case of no parent watcher	2024-01-24 16:26:03 +01:00
fsnotify.h	fsnotify: remove unused declaration	2022-09-09 11:40:03 +02:00
group.c	fsnotify: create helpers for group mark_mutex lock	2022-04-25 14:37:22 +02:00
Kconfig	fs/notify: Remove "select SRCU"	2023-02-02 16:26:06 -08:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mark.c	fanotify: store fsid in mark instead of in connector	2023-12-01 10:55:21 +01:00
notification.c	fsnotify: Pass group argument to free_event	2021-10-27 12:34:18 +02:00