From c51e7bb1845079fda515a7acf0514e289aa6a07c Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 25 Mar 2016 13:25:54 -0400 Subject: [PATCH] Btrfs: trace pinned extents Pinned extents are an important metric to keep track of for enospc. Signed-off-by: Josef Bacik Signed-off-by: David Sterba --- fs/btrfs/extent-tree.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 2c17b62..9aa64f1 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -6246,6 +6246,9 @@ static int update_block_group(struct btrfs_trans_handle *trans, spin_unlock(&cache->lock); spin_unlock(&cache->space_info->lock); + trace_btrfs_space_reservation(root->fs_info, "pinned", + cache->space_info->flags, + num_bytes, 1); set_extent_dirty(info->pinned_extents, bytenr, bytenr + num_bytes - 1, GFP_NOFS | __GFP_NOFAIL); @@ -6320,6 +6323,8 @@ static int pin_down_extent(struct btrfs_root *root, spin_unlock(&cache->lock); spin_unlock(&cache->space_info->lock); + trace_btrfs_space_reservation(root->fs_info, "pinned", + cache->space_info->flags, num_bytes, 1); set_extent_dirty(root->fs_info->pinned_extents, bytenr, bytenr + num_bytes - 1, GFP_NOFS | __GFP_NOFAIL); if (reserved) @@ -6678,6 +6683,9 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end, spin_lock(&cache->lock); cache->pinned -= len; space_info->bytes_pinned -= len; + + trace_btrfs_space_reservation(fs_info, "pinned", + space_info->flags, len, 0); space_info->max_extent_size = 0; percpu_counter_add(&space_info->total_bytes_pinned, -len); if (cache->ro) { -- 2.7.4