Waiman Long 9289012374 inotify: Increase default inotify.max_user_watches limit to 1048576 ... The default value of inotify.max_user_watches sysctl parameter was set to 8192 since the introduction of the inotify feature in 2005 by commit 0eeca28300 ("[PATCH] inotify"). Today this value is just too small for many modern usage. As a result, users have to explicitly set it to a larger value to make it work. After some searching around the web, these are the inotify.max_user_watches values used by some projects: - vscode: 524288 - dropbox support: 100000 - users on stackexchange: 12228 - lsyncd user: 2000000 - code42 support: 1048576 - monodevelop: 16384 - tectonic: 524288 - openshift origin: 65536 Each watch point adds an inotify_inode_mark structure to an inode to be watched. It also pins the watched inode. Modeled after the epoll.max_user_watches behavior to adjust the default value according to the amount of addressable memory available, make inotify.max_user_watches behave in a similar way to make it use no more than 1% of addressable memory within the range [8192, 1048576]. We estimate the amount of memory used by inotify mark to size of inotify_inode_mark plus two times the size of struct inode (we double the inode size to cover the additional filesystem private inode part). That means that a 64-bit system with 128GB or more memory will likely have the maximum value of 1048576 for inotify.max_user_watches. This default should be big enough for most use cases. Link: https://lore.kernel.org/r/20201109035931.4740-1-longman@redhat.com Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz>		2020-11-09 15:03:21 +01:00
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dnotify	fsnotify: create method handle_inode_event() in fsnotify_operations	2020-07-27 23:25:50 +02:00
fanotify	mm, memcg: rework remote charging API to support nesting	2020-10-18 09:27:09 -07:00
inotify	inotify: Increase default inotify.max_user_watches limit to 1048576	2020-11-09 15:03:21 +01:00
fdinfo.c	fsnotify: Remove proc_fs.h include	2020-05-13 17:16:14 +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	fanotify: fix logic of reporting name info with watched parent	2020-11-09 15:03:08 +01:00
fsnotify.h	fsnotify: move declaration of fsnotify_mark_connector_cachep to fsnotify.h	2019-10-17 10:31:12 +02:00
group.c	fsnotify: add mutex destroy	2020-05-13 17:14:20 +02:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
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	fsnotify: Add missing annotation for fsnotify_finish_user_wait() and for fsnotify_prepare_user_wait()	2020-04-15 11:44:43 +02:00
notification.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 18	2019-05-21 11:28:46 +02:00