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inode: convert inode_sb_list_lock to per-sb

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The process of reducing contention on per-superblock inode lists
starts with moving the locking to match the per-superblock inode
list. This takes the global lock out of the picture and reduces the
contention problems to within a single filesystem. This doesn't get
rid of contention as the locks still have global CPU scope, but it
does isolate operations on different superblocks form each other.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Dave Chinner 2015-03-04 12:37:22 -05:00 • committed by Josef Bacik
parent cbedaac634
commit 74278da9f7
10 changed files with 57 additions and 54 deletions
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4
include/linux/fsnotify_backend.h
View file

@ -357,7 +357,7 @@ extern void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group, un
extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group);
extern void fsnotify_get_mark(struct fsnotify_mark *mark);
extern void fsnotify_put_mark(struct fsnotify_mark *mark);
extern void fsnotify_unmount_inodes(struct list_head *list);
extern void fsnotify_unmount_inodes(struct super_block *sb);
/* put here because inotify does some weird stuff when destroying watches */
extern void fsnotify_init_event(struct fsnotify_event *event,
@ -393,7 +393,7 @@ static inline u32 fsnotify_get_cookie(void)
return 0;
}
static inline void fsnotify_unmount_inodes(struct list_head *list)
static inline void fsnotify_unmount_inodes(struct super_block *sb)
{}
#endif /* CONFIG_FSNOTIFY */