diff options
Diffstat (limited to 'fs/cachefiles')
| -rw-r--r-- | fs/cachefiles/daemon.c | 13 | ||||
| -rw-r--r-- | fs/cachefiles/interface.c | 11 | ||||
| -rw-r--r-- | fs/cachefiles/internal.h | 4 | ||||
| -rw-r--r-- | fs/cachefiles/namei.c | 28 |
4 files changed, 39 insertions, 17 deletions
diff --git a/fs/cachefiles/daemon.c b/fs/cachefiles/daemon.c index 452e98dd7560..1ee54ffd3a24 100644 --- a/fs/cachefiles/daemon.c +++ b/fs/cachefiles/daemon.c @@ -162,6 +162,8 @@ static ssize_t cachefiles_daemon_read(struct file *file, char __user *_buffer, size_t buflen, loff_t *pos) { struct cachefiles_cache *cache = file->private_data; + unsigned long long b_released; + unsigned f_released; char buffer[256]; int n; @@ -174,6 +176,8 @@ static ssize_t cachefiles_daemon_read(struct file *file, char __user *_buffer, cachefiles_has_space(cache, 0, 0); /* summarise */ + f_released = atomic_xchg(&cache->f_released, 0); + b_released = atomic_long_xchg(&cache->b_released, 0); clear_bit(CACHEFILES_STATE_CHANGED, &cache->flags); n = snprintf(buffer, sizeof(buffer), @@ -183,15 +187,18 @@ static ssize_t cachefiles_daemon_read(struct file *file, char __user *_buffer, " fstop=%llx" " brun=%llx" " bcull=%llx" - " bstop=%llx", + " bstop=%llx" + " freleased=%x" + " breleased=%llx", test_bit(CACHEFILES_CULLING, &cache->flags) ? '1' : '0', (unsigned long long) cache->frun, (unsigned long long) cache->fcull, (unsigned long long) cache->fstop, (unsigned long long) cache->brun, (unsigned long long) cache->bcull, - (unsigned long long) cache->bstop - ); + (unsigned long long) cache->bstop, + f_released, + b_released); if (n > buflen) return -EMSGSIZE; diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c index 675a3332d72f..861d611b8c05 100644 --- a/fs/cachefiles/interface.c +++ b/fs/cachefiles/interface.c @@ -291,15 +291,8 @@ static void cachefiles_drop_object(struct fscache_object *_object) } /* note that the object is now inactive */ - if (test_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags)) { - write_lock(&cache->active_lock); - if (!test_and_clear_bit(CACHEFILES_OBJECT_ACTIVE, - &object->flags)) - BUG(); - rb_erase(&object->active_node, &cache->active_nodes); - wake_up_bit(&object->flags, CACHEFILES_OBJECT_ACTIVE); - write_unlock(&cache->active_lock); - } + if (test_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags)) + cachefiles_mark_object_inactive(cache, object); dput(object->dentry); object->dentry = NULL; diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h index 9c4b737a54df..2fcde1a34b7c 100644 --- a/fs/cachefiles/internal.h +++ b/fs/cachefiles/internal.h @@ -66,6 +66,8 @@ struct cachefiles_cache { struct rb_root active_nodes; /* active nodes (can't be culled) */ rwlock_t active_lock; /* lock for active_nodes */ atomic_t gravecounter; /* graveyard uniquifier */ + atomic_t f_released; /* number of objects released lately */ + atomic_long_t b_released; /* number of blocks released lately */ unsigned frun_percent; /* when to stop culling (% files) */ unsigned fcull_percent; /* when to start culling (% files) */ unsigned fstop_percent; /* when to stop allocating (% files) */ @@ -157,6 +159,8 @@ extern char *cachefiles_cook_key(const u8 *raw, int keylen, uint8_t type); /* * namei.c */ +extern void cachefiles_mark_object_inactive(struct cachefiles_cache *cache, + struct cachefiles_object *object); extern int cachefiles_delete_object(struct cachefiles_cache *cache, struct cachefiles_object *object); extern int cachefiles_walk_to_object(struct cachefiles_object *parent, diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index 1c2334c163dd..4ae75006e73b 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -258,6 +258,28 @@ requeue: } /* + * Mark an object as being inactive. + */ +void cachefiles_mark_object_inactive(struct cachefiles_cache *cache, + struct cachefiles_object *object) +{ + write_lock(&cache->active_lock); + rb_erase(&object->active_node, &cache->active_nodes); + clear_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags); + write_unlock(&cache->active_lock); + + wake_up_bit(&object->flags, CACHEFILES_OBJECT_ACTIVE); + + /* This object can now be culled, so we need to let the daemon know + * that there is something it can remove if it needs to. + */ + atomic_long_add(d_backing_inode(object->dentry)->i_blocks, + &cache->b_released); + if (atomic_inc_return(&cache->f_released)) + cachefiles_state_changed(cache); +} + +/* * delete an object representation from the cache * - file backed objects are unlinked * - directory backed objects are stuffed into the graveyard for userspace to @@ -684,11 +706,7 @@ mark_active_timed_out: check_error: _debug("check error %d", ret); - write_lock(&cache->active_lock); - rb_erase(&object->active_node, &cache->active_nodes); - clear_bit(CACHEFILES_OBJECT_ACTIVE, &object->flags); - wake_up_bit(&object->flags, CACHEFILES_OBJECT_ACTIVE); - write_unlock(&cache->active_lock); + cachefiles_mark_object_inactive(cache, object); release_dentry: dput(object->dentry); object->dentry = NULL; |