fsnotify: use hash table for faster events merge

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In order to improve event merge performance, hash events in a 128 size
hash table by the event merge key.

The fanotify_event size grows by two pointers, but we just reduced its
size by removing the objectid member, so overall its size is increased
by one pointer.

Permission events and overflow event are not merged so they are also
not hashed.

Link: https://lore.kernel.org/r/20210304104826.3993892-5-amir73il@gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

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Amir Goldstein 2021-03-04 12:48:25 +02:00 • committed by Jan Kara

parent 7e3e5c6943

commit 94e00d28a6

6 changed files with 123 additions and 20 deletions

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10

include/linux/fsnotify_backend.h

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