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inotify: remove debug code

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The inotify debugging code is supposed to verify that the
DCACHE_INOTIFY_PARENT_WATCHED scalability optimisation does not result in
notifications getting lost nor extra needless locking generated.

Unfortunately there are also some races in the debugging code.  And it isn't
very good at finding problems anyway.  So remove it for now.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Robert Love <rlove@google.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Jan Kara <jack@ucw.cz>
Cc: Yan Zheng <yanzheng@21cn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Piggin 2008-02-06 01:37:29 -08:00 committed by Linus Torvalds
parent d599e36a9e
commit 0d71bd5993
2 changed files with 5 additions and 15 deletions
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3
fs/dcache.c
View File

@ -1408,9 +1408,6 @@ void d_delete(struct dentry * dentry)
if (atomic_read(&dentry->d_count) == 1) {
dentry_iput(dentry);
fsnotify_nameremove(dentry, isdir);
/* remove this and other inotify debug checks after 2.6.18 */
dentry->d_flags &= ~DCACHE_INOTIFY_PARENT_WATCHED;
return;
}

17
fs/inotify.c
View File

@ -168,20 +168,14 @@ static void set_dentry_child_flags(struct inode *inode, int watched)
struct dentry *child;
list_for_each_entry(child, &alias->d_subdirs, d_u.d_child) {
if (!child->d_inode) {
WARN_ON(child->d_flags & DCACHE_INOTIFY_PARENT_WATCHED);
if (!child->d_inode)
continue;
}
spin_lock(&child->d_lock);
if (watched) {
WARN_ON(child->d_flags &
DCACHE_INOTIFY_PARENT_WATCHED);
if (watched)
child->d_flags |= DCACHE_INOTIFY_PARENT_WATCHED;
} else {
WARN_ON(!(child->d_flags &
DCACHE_INOTIFY_PARENT_WATCHED));
child->d_flags&=~DCACHE_INOTIFY_PARENT_WATCHED;
}
else
child->d_flags &=~DCACHE_INOTIFY_PARENT_WATCHED;
spin_unlock(&child->d_lock);
}
}
@ -253,7 +247,6 @@ void inotify_d_instantiate(struct dentry *entry, struct inode *inode)
if (!inode)
return;
WARN_ON(entry->d_flags & DCACHE_INOTIFY_PARENT_WATCHED);
spin_lock(&entry->d_lock);
parent = entry->d_parent;
if (parent->d_inode && inotify_inode_watched(parent->d_inode))