*/
struct inodes_stat_t inodes_stat;
-static struct percpu_counter nr_inodes __cacheline_aligned_in_smp;
-static struct percpu_counter nr_inodes_unused __cacheline_aligned_in_smp;
+static DEFINE_PER_CPU(unsigned int, nr_inodes);
static struct kmem_cache *inode_cachep __read_mostly;
-static inline int get_nr_inodes(void)
+static int get_nr_inodes(void)
{
- return percpu_counter_sum_positive(&nr_inodes);
+ int i;
+ int sum = 0;
+ for_each_possible_cpu(i)
+ sum += per_cpu(nr_inodes, i);
+ return sum < 0 ? 0 : sum;
}
static inline int get_nr_inodes_unused(void)
{
- return percpu_counter_sum_positive(&nr_inodes_unused);
+ return inodes_stat.nr_unused;
}
int get_nr_dirty_inodes(void)
{
+ /* not actually dirty inodes, but a wild approximation */
int nr_dirty = get_nr_inodes() - get_nr_inodes_unused();
return nr_dirty > 0 ? nr_dirty : 0;
-
}
/*
void __user *buffer, size_t *lenp, loff_t *ppos)
{
inodes_stat.nr_inodes = get_nr_inodes();
- inodes_stat.nr_unused = get_nr_inodes_unused();
return proc_dointvec(table, write, buffer, lenp, ppos);
}
#endif
inode->i_fsnotify_mask = 0;
#endif
- percpu_counter_inc(&nr_inodes);
+ this_cpu_inc(nr_inodes);
return 0;
out:
return inode;
}
+void free_inode_nonrcu(struct inode *inode)
+{
+ kmem_cache_free(inode_cachep, inode);
+}
+EXPORT_SYMBOL(free_inode_nonrcu);
+
void __destroy_inode(struct inode *inode)
{
BUG_ON(inode_has_buffers(inode));
if (inode->i_default_acl && inode->i_default_acl != ACL_NOT_CACHED)
posix_acl_release(inode->i_default_acl);
#endif
- percpu_counter_dec(&nr_inodes);
+ this_cpu_dec(nr_inodes);
}
EXPORT_SYMBOL(__destroy_inode);
+static void i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ INIT_LIST_HEAD(&inode->i_dentry);
+ kmem_cache_free(inode_cachep, inode);
+}
+
static void destroy_inode(struct inode *inode)
{
BUG_ON(!list_empty(&inode->i_lru));
if (inode->i_sb->s_op->destroy_inode)
inode->i_sb->s_op->destroy_inode(inode);
else
- kmem_cache_free(inode_cachep, (inode));
+ call_rcu(&inode->i_rcu, i_callback);
+}
+
+void address_space_init_once(struct address_space *mapping)
+{
+ memset(mapping, 0, sizeof(*mapping));
+ INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC);
+ spin_lock_init(&mapping->tree_lock);
+ spin_lock_init(&mapping->i_mmap_lock);
+ INIT_LIST_HEAD(&mapping->private_list);
+ spin_lock_init(&mapping->private_lock);
+ INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap);
+ INIT_LIST_HEAD(&mapping->i_mmap_nonlinear);
+ mutex_init(&mapping->unmap_mutex);
}
+EXPORT_SYMBOL(address_space_init_once);
/*
* These are initializations that only need to be done
INIT_LIST_HEAD(&inode->i_devices);
INIT_LIST_HEAD(&inode->i_wb_list);
INIT_LIST_HEAD(&inode->i_lru);
- INIT_RADIX_TREE(&inode->i_data.page_tree, GFP_ATOMIC);
- spin_lock_init(&inode->i_data.tree_lock);
- spin_lock_init(&inode->i_data.i_mmap_lock);
- INIT_LIST_HEAD(&inode->i_data.private_list);
- spin_lock_init(&inode->i_data.private_lock);
- INIT_RAW_PRIO_TREE_ROOT(&inode->i_data.i_mmap);
- INIT_LIST_HEAD(&inode->i_data.i_mmap_nonlinear);
+ address_space_init_once(&inode->i_data);
i_size_ordered_init(inode);
#ifdef CONFIG_FSNOTIFY
INIT_HLIST_HEAD(&inode->i_fsnotify_marks);
{
if (list_empty(&inode->i_lru)) {
list_add(&inode->i_lru, &inode_lru);
- percpu_counter_inc(&nr_inodes_unused);
+ inodes_stat.nr_unused++;
}
}
{
if (!list_empty(&inode->i_lru)) {
list_del_init(&inode->i_lru);
- percpu_counter_dec(&nr_inodes_unused);
+ inodes_stat.nr_unused--;
}
}
BUG_ON(!(inode->i_state & I_FREEING));
BUG_ON(inode->i_state & I_CLEAR);
inode_sync_wait(inode);
+ /* don't need i_lock here, no concurrent mods to i_state */
inode->i_state = I_FREEING | I_CLEAR;
}
EXPORT_SYMBOL(end_writeback);
list_move(&inode->i_lru, &dispose);
list_del_init(&inode->i_wb_list);
if (!(inode->i_state & (I_DIRTY | I_SYNC)))
- percpu_counter_dec(&nr_inodes_unused);
+ inodes_stat.nr_unused--;
}
spin_unlock(&inode_lock);
/**
* invalidate_inodes - attempt to free all inodes on a superblock
* @sb: superblock to operate on
+ * @kill_dirty: flag to guide handling of dirty inodes
*
* Attempts to free all inodes for a given superblock. If there were any
* busy inodes return a non-zero value, else zero.
+ * If @kill_dirty is set, discard dirty inodes too, otherwise treat
+ * them as busy.
*/
-int invalidate_inodes(struct super_block *sb)
+int invalidate_inodes(struct super_block *sb, bool kill_dirty)
{
int busy = 0;
struct inode *inode, *next;
list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) {
if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE))
continue;
+ if (inode->i_state & I_DIRTY && !kill_dirty) {
+ busy = 1;
+ continue;
+ }
if (atomic_read(&inode->i_count)) {
busy = 1;
continue;
list_move(&inode->i_lru, &dispose);
list_del_init(&inode->i_wb_list);
if (!(inode->i_state & (I_DIRTY | I_SYNC)))
- percpu_counter_dec(&nr_inodes_unused);
+ inodes_stat.nr_unused--;
}
spin_unlock(&inode_lock);
if (atomic_read(&inode->i_count) ||
(inode->i_state & ~I_REFERENCED)) {
list_del_init(&inode->i_lru);
- percpu_counter_dec(&nr_inodes_unused);
+ inodes_stat.nr_unused--;
continue;
}
*/
list_move(&inode->i_lru, &freeable);
list_del_init(&inode->i_wb_list);
- percpu_counter_dec(&nr_inodes_unused);
+ inodes_stat.nr_unused--;
}
if (current_is_kswapd())
__count_vm_events(KSWAPD_INODESTEAL, reap);
SLAB_MEM_SPREAD),
init_once);
register_shrinker(&icache_shrinker);
- percpu_counter_init(&nr_inodes, 0);
- percpu_counter_init(&nr_inodes_unused, 0);
/* Hash may have been set up in inode_init_early */
if (!hashdist)
projects / mv-sheeva.git / blobdiff