[PATCH 08/23] btrfs: call btrfs_try_granting_tickets when reserving space

Josef Bacik
2020-07-08T14:00:37Z

If we have compression on we could free up more space than we reserved,
and thus be able to make a space reservation. Add the call for this
scenario.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Tested-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/block-group.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index daf88891a40a..c7097cb4fc7d 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -3058,6 +3058,13 @@ int btrfs_add_reserved_bytes(struct btrfs_block_group *cache,
space_info, -ram_bytes);
if (delalloc)
cache->delalloc_bytes += num_bytes;
+
+ /*
+ * Compression can use less space than we reserved, so wake
+ * tickets if that happens.
+ */
+ if (num_bytes < ram_bytes)
+ btrfs_try_granting_tickets(cache->fs_info, space_info);
}
spin_unlock(&cache->lock);
spin_unlock(&space_info->lock);
--
2.24.1