Signed-off-by: Nick Piggin <[email protected]>
---
fs/dcache.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
Index: linux-2.6/fs/dcache.c
===================================================================
--- linux-2.6.orig/fs/dcache.c 2010-11-17 00:52:38.000000000 +1100
+++ linux-2.6/fs/dcache.c 2010-11-17 01:05:37.000000000 +1100
@@ -586,7 +586,7 @@ static void shrink_dentry_list(struct li
dentry = list_entry(list->prev, struct dentry, d_lru);
if (!spin_trylock(&dentry->d_lock)) {
-relock:
+relock1:
spin_unlock(&dcache_lru_lock);
cpu_relax();
spin_lock(&dcache_lru_lock);
@@ -603,20 +603,24 @@ static void shrink_dentry_list(struct li
spin_unlock(&dentry->d_lock);
continue;
}
+ if (!spin_trylock(&dcache_inode_lock)) {
+relock2:
+ spin_unlock(&dentry->d_lock);
+ goto relock1;
+ }
if (IS_ROOT(dentry))
parent = NULL;
else
parent = dentry->d_parent;
if (parent && !spin_trylock(&parent->d_lock)) {
- spin_unlock(&dentry->d_lock);
- goto relock;
+ spin_unlock(&dcache_inode_lock);
+ goto relock2;
}
__dentry_lru_del(dentry);
spin_unlock(&dcache_lru_lock);
prune_one_dentry(dentry, parent);
/* dcache_inode_lock and dentry->d_lock dropped */
- spin_lock(&dcache_inode_lock);
spin_lock(&dcache_lru_lock);
}
}
@@ -637,7 +641,6 @@ static void __shrink_dcache_sb(struct su
LIST_HEAD(tmp);
int cnt = *count;
- spin_lock(&dcache_inode_lock);
relock:
spin_lock(&dcache_lru_lock);
while (!list_empty(&sb->s_dentry_lru)) {
@@ -675,7 +678,6 @@ static void __shrink_dcache_sb(struct su
if (!list_empty(&referenced))
list_splice(&referenced, &sb->s_dentry_lru);
spin_unlock(&dcache_lru_lock);
- spin_unlock(&dcache_inode_lock);
}
/**
@@ -764,14 +766,12 @@ void shrink_dcache_sb(struct super_block
{
LIST_HEAD(tmp);
- spin_lock(&dcache_inode_lock);
spin_lock(&dcache_lru_lock);
while (!list_empty(&sb->s_dentry_lru)) {
list_splice_init(&sb->s_dentry_lru, &tmp);
shrink_dentry_list(&tmp);
}
spin_unlock(&dcache_lru_lock);
- spin_unlock(&dcache_inode_lock);
}
EXPORT_SYMBOL(shrink_dcache_sb);