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Btrfs: trace pinned extents 

Pinned extents are an important metric to keep track of for enospc.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
steinar/wifi_calib_4_9_kernel
Josef Bacik 2016-03-25 13:25:54 -04:00 committed by David Sterba
parent 957780eb27
commit c51e7bb184
1 changed files with 8 additions and 0 deletions
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8
fs/btrfs/extent-tree.c
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@ -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) {