From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cantor2.suse.de ([195.135.220.15]:55206 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761410Ab3JPU1F (ORCPT ); Wed, 16 Oct 2013 16:27:05 -0400 Received: from relay1.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id E2409A57B3 for ; Wed, 16 Oct 2013 22:27:04 +0200 (CEST) Message-ID: <525EF695.9020307@suse.com> Date: Wed, 16 Oct 2013 16:27:01 -0400 From: Jeff Mahoney MIME-Version: 1.0 To: linux-btrfs Subject: [PATCH] btrfs: add tracing for failed reservations Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-btrfs-owner@vger.kernel.org List-ID: 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 --- fs/btrfs/extent-tree.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/fs/btrfs/extent-tree.c 2013-10-13 18:41:28.000000000 -0400 +++ b/fs/btrfs/extent-tree.c 2013-10-16 16:23:27.986639216 -0400 @@ -3681,6 +3681,9 @@ 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; @@ -4332,6 +4335,10 @@ 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; -- Jeff Mahoney SUSE Labs