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| author | Amir Goldstein <amir73il@gmail.com> | 2021-03-04 12:48:23 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2021-03-16 16:14:28 +0100 |
| commit | 8988f11abb820bacfcc53d498370bfb30f792ec4 (patch) | |
| tree | 00f938ddb78faf853b1ffe3c8ca21e58f670e781 /fs/notify/inotify | |
| parent | 6f73171e192366ff7c98af9fb50615ef9615f8a7 (diff) | |
| download | linux-8988f11abb820bacfcc53d498370bfb30f792ec4.tar.gz linux-8988f11abb820bacfcc53d498370bfb30f792ec4.tar.bz2 linux-8988f11abb820bacfcc53d498370bfb30f792ec4.zip | |
fanotify: reduce event objectid to 29-bit hash
objectid is only used by fanotify backend and it is just an optimization
for event merge before comparing all fields in event.
Move the objectid member from common struct fsnotify_event into struct
fanotify_event and reduce it to 29-bit hash to cram it together with the
3-bit event type.
Events of different types are never merged, so the combination of event
type and hash form a 32-bit key for fast compare of events.
This reduces the size of events by one pointer and paves the way for
adding hashed queue support for fanotify.
Link: https://lore.kernel.org/r/20210304104826.3993892-3-amir73il@gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify/inotify')
| -rw-r--r-- | fs/notify/inotify/inotify_fsnotify.c | 2 | ||||
| -rw-r--r-- | fs/notify/inotify/inotify_user.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c index 1901d799909b..0533bacbd584 100644 --- a/fs/notify/inotify/inotify_fsnotify.c +++ b/fs/notify/inotify/inotify_fsnotify.c @@ -107,7 +107,7 @@ int inotify_handle_inode_event(struct fsnotify_mark *inode_mark, u32 mask, mask &= ~IN_ISDIR; fsn_event = &event->fse; - fsnotify_init_event(fsn_event, 0); + fsnotify_init_event(fsn_event); event->mask = mask; event->wd = i_mark->wd; event->sync_cookie = cookie; diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c index a6c95bd64618..98f61b31745a 100644 --- a/fs/notify/inotify/inotify_user.c +++ b/fs/notify/inotify/inotify_user.c @@ -641,7 +641,7 @@ static struct fsnotify_group *inotify_new_group(unsigned int max_events) return ERR_PTR(-ENOMEM); } group->overflow_event = &oevent->fse; - fsnotify_init_event(group->overflow_event, 0); + fsnotify_init_event(group->overflow_event); oevent->mask = FS_Q_OVERFLOW; oevent->wd = -1; oevent->sync_cookie = 0; |