From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josef Bacik Subject: Re: btrfs warnings from 2.6.39-rc5 Date: Tue, 03 May 2011 10:52:49 -0400 Message-ID: <4DC016C1.2070505@redhat.com> References: <4DB863B4.3070900@sandia.gov> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Cc: linux-btrfs@vger.kernel.org, "ceph-devel@vger.kernel.org" To: Jim Schutt Return-path: In-Reply-To: <4DB863B4.3070900@sandia.gov> List-ID: On 04/27/2011 02:43 PM, Jim Schutt wrote: > Hi, > > I'm not sure if they matter, but I got these warnings on > one of the machines I'm using as a Ceph OSD server: > > [ 1806.549469] ------------[ cut here ]------------ > [ 1806.554593] WARNING: at fs/btrfs/extent-tree.c:5790 > use_block_rsv+0xa7/0x101 [btrfs]() > [ 1806.562903] Hardware name: PowerEdge 1950 > [ 1806.567126] Modules linked in: loop btrfs zlib_deflate lzo_compress > ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 > xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables > x_tables bridge stp i2c_dev i2c_core ext3 jbd ib_iser libi] > [ 1806.689084] Pid: 12025, comm: cosd Not tainted > 2.6.39-rc5-00006-g7b0bd4b #2 > [ 1806.697425] Call Trace: > [ 1806.700332] [] ? use_block_rsv+0xa7/0x101 [btrfs] > [ 1806.707032] [] ? warn_slowpath_common+0x85/0x9e > [ 1806.713502] [] ? warn_slowpath_null+0x1a/0x1c > [ 1806.720755] [] ? use_block_rsv+0xa7/0x101 [btrfs] > [ 1806.731488] [] ? btrfs_alloc_free_block+0x30/0x198 > [btrfs] > [ 1806.743858] [] ? > map_private_extent_buffer+0xb2/0xd9 [btrfs] > [ 1806.752600] [] ? __kmap_atomic+0x12/0x47 [btrfs] > [ 1806.760057] [] ? read_extent_buffer+0xc2/0xd4 [btrfs] > [ 1806.770897] [] ? __btrfs_cow_block+0x10e/0x2f5 [btrfs] > [ 1806.779552] [] ? btrfs_header_generation+0x1f/0x25 > [btrfs] > [ 1806.788994] [] ? btrfs_cow_block+0xfc/0x121 [btrfs] > [ 1806.798434] [] ? btrfs_search_slot+0x144/0x3ae [btrfs] > [ 1806.806444] [] ? btrfs_lookup_inode+0x31/0x86 [btrfs] > [ 1806.813611] [] ? btrfs_update_inode+0x52/0xc1 [btrfs] > [ 1806.820904] [] ? btrfs_truncate+0x239/0x297 [btrfs] > [ 1806.829290] [] ? btrfs_setsize+0x8c/0x9b [btrfs] > [ 1806.835962] [] ? btrfs_setattr+0x61/0x9d [btrfs] > [ 1806.842892] [] ? notify_change+0x174/0x1bc > [ 1806.850878] [] ? do_truncate+0x6e/0x8a > [ 1806.857374] [] ? generic_permission+0x1c/0x8e > [ 1806.868498] [] ? do_sys_truncate+0xf8/0x10a > [ 1806.877746] [] ? sys_truncate+0xe/0x10 > [ 1806.902751] [] ? system_call_fastpath+0x16/0x1b > [ 1806.909736] ---[ end trace cd0ae33f1a4433d9 ]--- > [ 1812.142333] ------------[ cut here ]------------ > [ 1812.146996] WARNING: at fs/btrfs/inode.c:2180 > btrfs_orphan_commit_root+0x8c/0xab [btrfs]() > [ 1812.155275] Hardware name: PowerEdge 1950 > [ 1812.159280] Modules linked in: loop btrfs zlib_deflate lzo_compress > ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 > xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables > x_tables bridge stp i2c_dev i2c_core ext3 jbd ib_iser libi] > [ 1812.240872] Pid: 7923, comm: kworker/3:2 Tainted: G W > 2.6.39-rc5-00006-g7b0bd4b #2 > [ 1812.249216] Call Trace: > [ 1812.251712] [] ? btrfs_orphan_commit_root+0x8c/0xab > [btrfs] > [ 1812.258976] [] ? warn_slowpath_common+0x85/0x9e > [ 1812.265199] [] ? warn_slowpath_null+0x1a/0x1c > [ 1812.271420] [] ? btrfs_orphan_commit_root+0x8c/0xab > [btrfs] > [ 1812.278704] [] ? commit_fs_roots+0x95/0xfd [btrfs] > [ 1812.285220] [] ? btrfs_run_delayed_refs+0x112/0x15e > [btrfs] > [ 1812.292459] [] ? need_resched+0x23/0x2d > [ 1812.297961] [] ? should_resched+0xe/0x2f > [ 1812.303604] [] ? > btrfs_commit_transaction+0x349/0x5a3 [btrfs] > [ 1812.310999] [] ? list_del_init+0x21/0x21 > [ 1812.316615] [] ? do_async_commit+0x1f/0x2c [btrfs] > [ 1812.323055] [] ? process_one_work+0x124/0x1e0 > [ 1812.329083] [] ? > btrfs_commit_transaction+0x5a3/0x5a3 [btrfs] > [ 1812.336526] [] ? workqueue_congested+0x1e/0x1e > [ 1812.342636] [] ? worker_thread+0x8f/0x124 > [ 1812.348353] [] ? kthread+0x72/0x7a > [ 1812.353439] [] ? kernel_thread_helper+0x4/0x10 > [ 1812.359555] [] ? retint_restore_args+0xe/0xe > [ 1812.365484] [] ? kthread_bind+0x64/0x64 > [ 1812.370986] [] ? gs_change+0xb/0xb > [ 1812.376047] ---[ end trace cd0ae33f1a4433da ]--- > > Please let me know if I can do anything to help sort these out. > I just posted a patch for this problem, it's titled Btrfs: fix how we do space reservation for truncate Please apply it and test it and see if it makes this problem go away. Thanks, Josef