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authorRobert Love <rml@novell.com>2005-07-12 17:06:03 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-12 23:38:38 -0400
commit0eeca28300df110bd6ed54b31193c83b87921443 (patch)
tree7db42d8a18d80eca538f5b7d25e0532b8fa38b85 /kernel/sys_ni.c
parentbd4c625c061c2a38568d0add3478f59172455159 (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.c3
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);
80cond_syscall(compat_sys_keyctl); 80cond_syscall(compat_sys_keyctl);
81cond_syscall(compat_sys_socketcall); 81cond_syscall(compat_sys_socketcall);
82cond_syscall(sys_set_zone_reclaim); 82cond_syscall(sys_set_zone_reclaim);
83cond_syscall(sys_inotify_init);
84cond_syscall(sys_inotify_add_watch);
85cond_syscall(sys_inotify_rm_watch);
83 86
84/* arch-specific weak syscall entries */ 87/* arch-specific weak syscall entries */
85cond_syscall(sys_pciconfig_read); 88cond_syscall(sys_pciconfig_read);