From 3d6fec02c6a996f658bdaa6a1da381f9b72da032 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Tue, 25 Mar 2008 13:48:18 +0100 Subject: [PATCH] inotify: remove debug code upstream commit: 0d71bd5993b630a989d15adc2562a9ffe41cd26d 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 Cc: Robert Love Cc: John McCutchan Cc: Jan Kara Cc: Yan Zheng Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Cc: Christian Lamparter Signed-off-by: Chris Wright --- fs/dcache.c | 3 --- fs/inotify.c | 17 +++++------------ 2 files changed, 5 insertions(+), 15 deletions(-) diff --git a/fs/dcache.c b/fs/dcache.c index d9ca1e5ceb9..c369bf92134 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -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; } diff --git a/fs/inotify.c b/fs/inotify.c index b2b109bf29d..690e72595e6 100644 --- a/fs/inotify.c +++ b/fs/inotify.c @@ -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)) -- 2.34.1