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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inotify_fsnotify.c	mm, memcg: rework remote charging API to support nesting	2020-10-18 09:27:09 -07:00
inotify_user.c	inotify: Increase default inotify.max_user_watches limit to 1048576	2020-11-09 15:03:21 +01:00
inotify.h	fsnotify: pass dir argument to handle_event() callback	2020-07-27 18:32:47 +02:00
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00