Btrfs: add allocator tracepoints
I used these tracepoints when figuring out what the cluster stuff was doing, so
add them to mainline in case we need to profile this stuff again. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 6c7887a..efe2003 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2346,6 +2346,8 @@
&entry->offset_index, 1);
BUG_ON(ret);
+ trace_btrfs_setup_cluster(block_group, cluster,
+ total_found * block_group->sectorsize, 1);
return 0;
}
@@ -2368,6 +2370,7 @@
u64 window_start;
u64 window_free;
u64 max_extent;
+ u64 total_size = 0;
entry = tree_search_offset(ctl, offset, 0, 1);
if (!entry)
@@ -2433,11 +2436,12 @@
rb_erase(&entry->offset_index, &ctl->free_space_offset);
ret = tree_insert_offset(&cluster->root, entry->offset,
&entry->offset_index, 0);
+ total_size += entry->bytes;
BUG_ON(ret);
} while (node && entry != last);
cluster->max_size = max_extent;
-
+ trace_btrfs_setup_cluster(block_group, cluster, total_size, 0);
return 0;
}
@@ -2542,6 +2546,10 @@
goto out;
}
+ trace_btrfs_find_cluster(block_group, offset, bytes, empty_size,
+ min_bytes);
+
+ INIT_LIST_HEAD(&bitmaps);
ret = setup_cluster_no_bitmap(block_group, cluster, &bitmaps, offset,
bytes + empty_size,
cont1_bytes, min_bytes);
@@ -2559,6 +2567,8 @@
list_add_tail(&cluster->block_group_list,
&block_group->cluster_list);
cluster->block_group = block_group;
+ } else {
+ trace_btrfs_failed_cluster_setup(block_group);
}
out:
spin_unlock(&cluster->lock);