diff options
author | Robert Love <rml@novell.com> | 2005-07-12 17:06:03 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-12 23:38:38 -0400 |
commit | 0eeca28300df110bd6ed54b31193c83b87921443 (patch) | |
tree | 7db42d8a18d80eca538f5b7d25e0532b8fa38b85 /kernel/sys_ni.c | |
parent | bd4c625c061c2a38568d0add3478f59172455159 (diff) |
[PATCH] inotify
inotify is intended to correct the deficiencies of dnotify, particularly
its inability to scale and its terrible user interface:
* dnotify requires the opening of one fd per each directory
that you intend to watch. This quickly results in too many
open files and pins removable media, preventing unmount.
* dnotify is directory-based. You only learn about changes to
directories. Sure, a change to a file in a directory affects
the directory, but you are then forced to keep a cache of
stat structures.
* dnotify's interface to user-space is awful. Signals?
inotify provides a more usable, simple, powerful solution to file change
notification:
* inotify's interface is a system call that returns a fd, not SIGIO.
You get a single fd, which is select()-able.
* inotify has an event that says "the filesystem that the item
you were watching is on was unmounted."
* inotify can watch directories or files.
Inotify is currently used by Beagle (a desktop search infrastructure),
Gamin (a FAM replacement), and other projects.
See Documentation/filesystems/inotify.txt.
Signed-off-by: Robert Love <rml@novell.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/sys_ni.c')
-rw-r--r-- | kernel/sys_ni.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c index 29196ce9b40..42b40ae5ead 100644 --- a/kernel/sys_ni.c +++ b/kernel/sys_ni.c | |||
@@ -80,6 +80,9 @@ cond_syscall(sys_keyctl); | |||
80 | cond_syscall(compat_sys_keyctl); | 80 | cond_syscall(compat_sys_keyctl); |
81 | cond_syscall(compat_sys_socketcall); | 81 | cond_syscall(compat_sys_socketcall); |
82 | cond_syscall(sys_set_zone_reclaim); | 82 | cond_syscall(sys_set_zone_reclaim); |
83 | cond_syscall(sys_inotify_init); | ||
84 | cond_syscall(sys_inotify_add_watch); | ||
85 | cond_syscall(sys_inotify_rm_watch); | ||
83 | 86 | ||
84 | /* arch-specific weak syscall entries */ | 87 | /* arch-specific weak syscall entries */ |
85 | cond_syscall(sys_pciconfig_read); | 88 | cond_syscall(sys_pciconfig_read); |