From cab45e22da48b523665b3566f43527a2fead1d1e Mon Sep 17 00:00:00 2001 From: Jeff Mahoney Date: Wed, 16 Oct 2013 16:27:01 -0400 Subject: [PATCH] btrfs: add tracing for failed reservations When debugging ENOSPC issues, it's nice to be able to see which reservations failed as well as the ones which succeeded. Signed-off-by: Jeff Mahoney Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/extent-tree.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 4062a65..a807acc 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3684,6 +3684,9 @@ commit_trans: goto again; } + trace_btrfs_space_reservation(root->fs_info, + "space_info:enospc", + data_sinfo->flags, bytes, 1); return -ENOSPC; } data_sinfo->bytes_may_use += bytes; @@ -4335,6 +4338,10 @@ out: !block_rsv_use_bytes(global_rsv, orig_bytes)) ret = 0; } + if (ret == -ENOSPC) + trace_btrfs_space_reservation(root->fs_info, + "space_info:enospc", + space_info->flags, orig_bytes, 1); if (flushing) { spin_lock(&space_info->lock); space_info->flush = 0; -- 2.7.4