[PATCH] autofs4: add a show mount options for proc filesystem

[linux-2.6-omap-h63xx.git] / fs / dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index 11dc83092d4aa48c78650f6dee4b48b834d25d7e..19458d3995024123c226e4de7a950ff71319462b 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -34,9 +34,8 @@
 #include <linux/swap.h>
 #include <linux/bootmem.h>
 
-/* #define DCACHE_DEBUG 1 */
 
-int sysctl_vfs_cache_pressure = 100;
+int sysctl_vfs_cache_pressure __read_mostly = 100;
 EXPORT_SYMBOL_GPL(sysctl_vfs_cache_pressure);
 
  __cacheline_aligned_in_smp DEFINE_SPINLOCK(dcache_lock);
@@ -44,7 +43,7 @@ static seqlock_t rename_lock __cacheline_aligned_in_smp = SEQLOCK_UNLOCKED;
 
 EXPORT_SYMBOL(dcache_lock);
 
-static kmem_cache_t *dentry_cache; 
+static kmem_cache_t *dentry_cache __read_mostly;
 
 #define DNAME_INLINE_LEN (sizeof(struct dentry)-offsetof(struct dentry,d_iname))
 
@@ -59,9 +58,9 @@ static kmem_cache_t *dentry_cache;
 #define D_HASHBITS     d_hash_shift
 #define D_HASHMASK     d_hash_mask
 
-static unsigned int d_hash_mask;
-static unsigned int d_hash_shift;
-static struct hlist_head *dentry_hashtable;
+static unsigned int d_hash_mask __read_mostly;
+static unsigned int d_hash_shift __read_mostly;
+static struct hlist_head *dentry_hashtable __read_mostly;
 static LIST_HEAD(dentry_unused);
 
 /* Statistics gathering. */
@@ -325,10 +324,13 @@ static struct dentry * __d_find_alias(struct inode *inode, int want_discon)
 
 struct dentry * d_find_alias(struct inode *inode)
 {
-       struct dentry *de;
-       spin_lock(&dcache_lock);
-       de = __d_find_alias(inode, 0);
-       spin_unlock(&dcache_lock);
+       struct dentry *de = NULL;
+
+       if (!list_empty(&inode->i_dentry)) {
+               spin_lock(&dcache_lock);
+               de = __d_find_alias(inode, 0);
+               spin_unlock(&dcache_lock);
+       }
        return de;
 }
 
@@ -486,6 +488,7 @@ repeat:
                        continue;
                }
                prune_one_dentry(dentry);
+               cond_resched_lock(&dcache_lock);
                goto repeat;
        }
        spin_unlock(&dcache_lock);
@@ -599,10 +602,6 @@ resume:
                 */
                if (!list_empty(&dentry->d_subdirs)) {
                        this_parent = dentry;
-#ifdef DCACHE_DEBUG
-printk(KERN_DEBUG "select_parent: descending to %s/%s, found=%d\n",
-dentry->d_parent->d_name.name, dentry->d_name.name, found);
-#endif
                        goto repeat;
                }
        }
@@ -612,10 +611,6 @@ dentry->d_parent->d_name.name, dentry->d_name.name, found);
        if (this_parent != parent) {
                next = this_parent->d_u.d_child.next;
                this_parent = this_parent->d_parent;
-#ifdef DCACHE_DEBUG
-printk(KERN_DEBUG "select_parent: ascending to %s/%s, found=%d\n",
-this_parent->d_parent->d_name.name, this_parent->d_name.name, found);
-#endif
                goto resume;
        }
 out:
@@ -794,11 +789,12 @@ struct dentry *d_alloc_name(struct dentry *parent, const char *name)
  
 void d_instantiate(struct dentry *entry, struct inode * inode)
 {
-       if (!list_empty(&entry->d_alias)) BUG();
+       BUG_ON(!list_empty(&entry->d_alias));
        spin_lock(&dcache_lock);
        if (inode)
                list_add(&entry->d_alias, &inode->i_dentry);
        entry->d_inode = inode;
+       fsnotify_d_instantiate(entry, inode);
        spin_unlock(&dcache_lock);
        security_d_instantiate(entry, inode);
 }
@@ -850,6 +846,7 @@ struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode)
        list_add(&entry->d_alias, &inode->i_dentry);
 do_negative:
        entry->d_inode = inode;
+       fsnotify_d_instantiate(entry, inode);
        spin_unlock(&dcache_lock);
        security_d_instantiate(entry, inode);
        return NULL;
@@ -980,6 +977,7 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
                new = __d_find_alias(inode, 1);
                if (new) {
                        BUG_ON(!(new->d_flags & DCACHE_DISCONNECTED));
+                       fsnotify_d_instantiate(new, inode);
                        spin_unlock(&dcache_lock);
                        security_d_instantiate(new, inode);
                        d_rehash(dentry);
@@ -989,6 +987,7 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
                        /* d_instantiate takes dcache_lock, so we do it by hand */
                        list_add(&dentry->d_alias, &inode->i_dentry);
                        dentry->d_inode = inode;
+                       fsnotify_d_instantiate(dentry, inode);
                        spin_unlock(&dcache_lock);
                        security_d_instantiate(dentry, inode);
                        d_rehash(dentry);
@@ -1173,6 +1172,9 @@ void d_delete(struct dentry * dentry)
        spin_lock(&dentry->d_lock);
        isdir = S_ISDIR(dentry->d_inode->i_mode);
        if (atomic_read(&dentry->d_count) == 1) {
+               /* remove this and other inotify debug checks after 2.6.18 */
+               dentry->d_flags &= ~DCACHE_INOTIFY_PARENT_WATCHED;
+
                dentry_iput(dentry);
                fsnotify_nameremove(dentry, isdir);
                return;
@@ -1339,6 +1341,7 @@ already_unhashed:
 
        list_add(&dentry->d_u.d_child, &dentry->d_parent->d_subdirs);
        spin_unlock(&target->d_lock);
+       fsnotify_d_move(dentry);
        spin_unlock(&dentry->d_lock);
        write_sequnlock(&rename_lock);
        spin_unlock(&dcache_lock);
@@ -1682,7 +1685,8 @@ static void __init dcache_init(unsigned long mempages)
        dentry_cache = kmem_cache_create("dentry_cache",
                                         sizeof(struct dentry),
                                         0,
-                                        SLAB_RECLAIM_ACCOUNT|SLAB_PANIC,
+                                        (SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|
+                                        SLAB_MEM_SPREAD),
                                         NULL, NULL);
        
        set_shrinker(DEFAULT_SEEKS, shrink_dcache_memory);
@@ -1706,10 +1710,10 @@ static void __init dcache_init(unsigned long mempages)
 }
 
 /* SLAB cache for __getname() consumers */
-kmem_cache_t *names_cachep;
+kmem_cache_t *names_cachep __read_mostly;
 
 /* SLAB cache for file structures */
-kmem_cache_t *filp_cachep;
+kmem_cache_t *filp_cachep __read_mostly;
 
 EXPORT_SYMBOL(d_genocide);