if (need_resched() ||
rwsem_is_contended(&fs_info->commit_root_sem)) {
- if (wakeup)
- caching_ctl->progress = last;
btrfs_release_path(path);
up_read(&fs_info->commit_root_sem);
mutex_unlock(&caching_ctl->mutex);
key.objectid = last;
key.offset = 0;
key.type = BTRFS_EXTENT_ITEM_KEY;
-
- if (wakeup)
- caching_ctl->progress = last;
btrfs_release_path(path);
goto next;
}
total_found += add_new_free_space(block_group, last,
block_group->start + block_group->length);
- caching_ctl->progress = (u64)-1;
out:
btrfs_free_path(path);
}
#endif
- caching_ctl->progress = (u64)-1;
-
up_read(&fs_info->commit_root_sem);
btrfs_free_excluded_extents(block_group);
mutex_unlock(&caching_ctl->mutex);
mutex_init(&caching_ctl->mutex);
init_waitqueue_head(&caching_ctl->wait);
caching_ctl->block_group = cache;
- caching_ctl->progress = cache->start;
refcount_set(&caching_ctl->count, 2);
btrfs_init_work(&caching_ctl->work, caching_thread, NULL, NULL);
/* Should not have any excluded extents. Just in case, though. */
btrfs_free_excluded_extents(cache);
} else if (cache->length == cache->used) {
- cache->last_byte_to_unpin = (u64)-1;
cache->cached = BTRFS_CACHE_FINISHED;
btrfs_free_excluded_extents(cache);
} else if (cache->used == 0) {
- cache->last_byte_to_unpin = (u64)-1;
cache->cached = BTRFS_CACHE_FINISHED;
add_new_free_space(cache, cache->start,
cache->start + cache->length);
/* Fill dummy cache as FULL */
bg->length = em->len;
bg->flags = map->type;
- bg->last_byte_to_unpin = (u64)-1;
bg->cached = BTRFS_CACHE_FINISHED;
bg->used = em->len;
bg->flags = map->type;
set_free_space_tree_thresholds(cache);
cache->used = bytes_used;
cache->flags = type;
- cache->last_byte_to_unpin = (u64)-1;
cache->cached = BTRFS_CACHE_FINISHED;
cache->global_root_id = calculate_global_root_id(fs_info, cache->start);
wait_queue_head_t wait;
struct btrfs_work work;
struct btrfs_block_group *block_group;
- u64 progress;
refcount_t count;
};
/* Cache tracking stuff */
int cached;
struct btrfs_caching_control *caching_ctl;
- u64 last_byte_to_unpin;
struct btrfs_space_info *space_info;
len = cache->start + cache->length - start;
len = min(len, end + 1 - start);
- down_read(&fs_info->commit_root_sem);
- if (start < cache->last_byte_to_unpin && return_free_space) {
- u64 add_len = min(len, cache->last_byte_to_unpin - start);
-
- btrfs_add_free_space(cache, start, add_len);
- }
- up_read(&fs_info->commit_root_sem);
+ if (return_free_space)
+ btrfs_add_free_space(cache, start, len);
start += len;
total_unpinned += len;
ASSERT(key.type == BTRFS_FREE_SPACE_BITMAP_KEY);
ASSERT(key.objectid < end && key.objectid + key.offset <= end);
- caching_ctl->progress = key.objectid;
-
offset = key.objectid;
while (offset < key.objectid + key.offset) {
bit = free_space_test_bit(block_group, path, offset);
goto out;
}
- caching_ctl->progress = (u64)-1;
-
ret = 0;
out:
return ret;
ASSERT(key.type == BTRFS_FREE_SPACE_EXTENT_KEY);
ASSERT(key.objectid < end && key.objectid + key.offset <= end);
- caching_ctl->progress = key.objectid;
-
total_found += add_new_free_space(block_group, key.objectid,
key.objectid + key.offset);
if (total_found > CACHING_CTL_WAKE_UP) {
goto out;
}
- caching_ctl->progress = (u64)-1;
-
ret = 0;
out:
return ret;
struct btrfs_transaction *cur_trans = trans->transaction;
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_root *root, *tmp;
- struct btrfs_caching_control *caching_ctl, *next;
/*
* At this point no one can be using this transaction to modify any tree
}
spin_unlock(&cur_trans->dropped_roots_lock);
- /*
- * We have to update the last_byte_to_unpin under the commit_root_sem,
- * at the same time we swap out the commit roots.
- *
- * This is because we must have a real view of the last spot the caching
- * kthreads were while caching. Consider the following views of the
- * extent tree for a block group
- *
- * commit root
- * +----+----+----+----+----+----+----+
- * |\\\\| |\\\\|\\\\| |\\\\|\\\\|
- * +----+----+----+----+----+----+----+
- * 0 1 2 3 4 5 6 7
- *
- * new commit root
- * +----+----+----+----+----+----+----+
- * | | | |\\\\| | |\\\\|
- * +----+----+----+----+----+----+----+
- * 0 1 2 3 4 5 6 7
- *
- * If the cache_ctl->progress was at 3, then we are only allowed to
- * unpin [0,1) and [2,3], because the caching thread has already
- * processed those extents. We are not allowed to unpin [5,6), because
- * the caching thread will re-start it's search from 3, and thus find
- * the hole from [4,6) to add to the free space cache.
- */
- write_lock(&fs_info->block_group_cache_lock);
- list_for_each_entry_safe(caching_ctl, next,
- &fs_info->caching_block_groups, list) {
- struct btrfs_block_group *cache = caching_ctl->block_group;
-
- if (btrfs_block_group_done(cache)) {
- cache->last_byte_to_unpin = (u64)-1;
- list_del_init(&caching_ctl->list);
- btrfs_put_caching_control(caching_ctl);
- } else {
- cache->last_byte_to_unpin = caching_ctl->progress;
- }
- }
- write_unlock(&fs_info->block_group_cache_lock);
up_write(&fs_info->commit_root_sem);
}
free = cache->zone_capacity - cache->alloc_offset;
/* We only need ->free_space in ALLOC_SEQ block groups */
- cache->last_byte_to_unpin = (u64)-1;
cache->cached = BTRFS_CACHE_FINISHED;
cache->free_space_ctl->free_space = free;
cache->zone_unusable = unusable;
projects / kernel.git / commitdiff