From mboxrd@z Thu Jan 1 00:00:00 1970 From: Liu Bo Subject: Re: [PATCH 0/5] btrfs: snapshot deletion via readahead Date: Fri, 27 Apr 2012 11:16:36 +0800 Message-ID: <4F9A0F94.3030409@cn.fujitsu.com> References: <4F87A034.3030607@cn.fujitsu.com> <4F87CD6D.5040100@gmx.net> <4F87D157.4040607@cn.fujitsu.com> <4F87D368.5070807@gmx.net> <4F87D924.6080501@cn.fujitsu.com> <4F8D1D49.1060404@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: linux-btrfs@vger.kernel.org To: Arne Jansen Return-path: In-Reply-To: <4F8D1D49.1060404@gmx.net> List-ID: On 04/17/2012 03:35 PM, Arne Jansen wrote: > On 13.04.2012 09:43, Liu Bo wrote: >> > On 04/13/2012 03:19 PM, Arne Jansen wrote: >> > >>> >> >>> >> might be out of memory. How much does this vm (?) have? >>> >> Can you try to reduce the constants in disk-io.c:2003-2005? >>> >> >>> >> Thanks, >>> >> Arne >>> >> >> > >> > >> > Seems not related to an OOM: >> > # free -m >> > total used free shared buffers cached >> > Mem: 1973 478 1494 0 49 315 >> > -/+ buffers/cache: 113 1859 >> > Swap: 0 0 0 >> > >> > > > so it seems I've lost a patch along the way that was supposed to fix > that: "btrfs: fix race in reada". I pushed my tree again with this > patch on top. > Hi Arne, Sorry for the long delay. I've tested the droptree patch (1/5->5/5) on the latest upstream 3.4-rc4 along with the missed patch "btrfs: fix race in reada". And I've got several different bugs and hangs, one of them is the following: Btrfs loaded device fsid e7b013a1-0d11-4162-83de-8404360f520a devid 1 transid 4 /dev/sdb6 btrfs: disk space caching is enabled Btrfs detected SSD devices, enabling SSD mode device fsid e7b013a1-0d11-4162-83de-8404360f520a devid 1 transid 8 /dev/sdb6 btrfs: disk space caching is enabled Btrfs detected SSD devices, enabling SSD mode device fsid e7b013a1-0d11-4162-83de-8404360f520a devid 1 transid 2011 /dev/sdb6 btrfs: disk space caching is enabled Btrfs detected SSD devices, enabling SSD mode btrfs: block rsv returned -28 ------------[ cut here ]------------ WARNING: at fs/btrfs/extent-tree.c:6220 btrfs_alloc_free_block+0x353/0x370 [btrfs]() Hardware name: QiTianM7150 Modules linked in: btrfs(O) zlib_deflate libcrc32c ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables ipt_REJECT bridge stp llc nfsd lockd nfs_acl auth_rpcgss exportfs autofs4 sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb3i libcxgbi cxgb3 mdio ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ext3 jbd dm_mirror dm_region_hash dm_log dm_mod kvm_intel kvm ppdev sg parport_pc parport coretemp hwmon i2c_i801 pcspkr iTCO_wdt iTCO_vendor_support sky2 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd soundcore snd_page_alloc ext4 mbcache jbd2 sd_mod crc_t10dif pata_acpi ata_generic ata_piix i915 drm_kms_ helper drm i2c_algo_bit i2c_core video [last unloaded: btrfs] Pid: 4605, comm: btrfs-transacti Tainted: G O 3.4.0-rc4+ #11 Call Trace: [] warn_slowpath_common+0x7f/0xc0 [] warn_slowpath_null+0x1a/0x20 [] btrfs_alloc_free_block+0x353/0x370 [btrfs] [] ? read_extent_buffer+0xd1/0x130 [btrfs] [] ? btree_read_extent_buffer_pages.clone.2+0xca/0x140 [btrfs] [] __btrfs_cow_block+0x142/0x570 [btrfs] [] ? read_block_for_search+0x14d/0x3e0 [btrfs] [] btrfs_cow_block+0x102/0x210 [btrfs] [] btrfs_search_slot+0x42c/0x960 [btrfs] [] btrfs_delete_delayed_items+0x99/0x340 [btrfs] [] ? kmem_cache_alloc+0x152/0x190 [] btrfs_run_delayed_items+0x112/0x160 [btrfs] [] btrfs_commit_transaction+0x36f/0xa80 [btrfs] [] ? start_transaction+0x92/0x320 [btrfs] [] ? wake_up_bit+0x40/0x40 [] transaction_kthread+0x26b/0x2e0 [btrfs] [] ? btrfs_destroy_marked_extents.clone.0+0x1f0/0x1f0 [btrfs] [] ? btrfs_destroy_marked_extents.clone.0+0x1f0/0x1f0 [btrfs] [] kthread+0x9e/0xb0 [] kernel_thread_helper+0x4/0x10 [] ? kthread_freezable_should_stop+0x70/0x70 [] ? gs_change+0x13/0x13 ---[ end trace 504e7bc5e13ed457 ]--- btrfs: block rsv returned -28 ------------[ cut here ]------------ WARNING: at fs/btrfs/extent-tree.c:6220 btrfs_alloc_free_block+0x353/0x370 [btrfs]() Hardware name: QiTianM7150 Modules linked in: btrfs(O) zlib_deflate libcrc32c ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables ipt_REJECT bridge stp llc nfsd lockd nfs_acl auth_rpcgss exportfs autofs4 sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb3i libcxgbi cxgb3 mdio ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ext3 jbd dm_mirror dm_region_hash dm_log dm_mod kvm_intel kvm ppdev sg parport_pc parport coretemp hwmon i2c_i801 pcspkr iTCO_wdt iTCO_vendor_support sky2 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd soundcore snd_page_alloc ext4 mbcache jbd2 sd_mod crc_t10dif pata_acpi ata_generic ata_piix i915 drm_kms_ helper drm i2c_algo_bit i2c_core video [last unloaded: btrfs] Pid: 4605, comm: btrfs-transacti Tainted: G W O 3.4.0-rc4+ #11 Call Trace: [] warn_slowpath_common+0x7f/0xc0 [] warn_slowpath_null+0x1a/0x20 [] btrfs_alloc_free_block+0x353/0x370 [btrfs] [] ? read_extent_buffer+0xd1/0x130 [btrfs] [] ? btree_read_extent_buffer_pages.clone.2+0xca/0x140 [btrfs] [] __btrfs_cow_block+0x142/0x570 [btrfs] [] ? read_block_for_search+0x14d/0x3e0 [btrfs] [] btrfs_cow_block+0x102/0x210 [btrfs] [] btrfs_search_slot+0x42c/0x960 [btrfs] [] btrfs_delete_delayed_items+0x99/0x340 [btrfs] [] ? kmem_cache_alloc+0x152/0x190 [] btrfs_run_delayed_items+0x112/0x160 [btrfs] [] btrfs_commit_transaction+0x36f/0xa80 [btrfs] [] ? start_transaction+0x92/0x320 [btrfs] [] ? wake_up_bit+0x40/0x40 [] transaction_kthread+0x26b/0x2e0 [btrfs] [] ? btrfs_destroy_marked_extents.clone.0+0x1f0/0x1f0 [btrfs] [] ? btrfs_destroy_marked_extents.clone.0+0x1f0/0x1f0 [btrfs] [] kthread+0x9e/0xb0 [] kernel_thread_helper+0x4/0x10 [] ? kthread_freezable_should_stop+0x70/0x70 [] ? gs_change+0x13/0x13 ---[ end trace 504e7bc5e13ed458 ]--- ------------[ cut here ]------------ kernel BUG at fs/btrfs/transaction.c:1550! invalid opcode: 0000 [#1] SMP CPU 1 Modules linked in: btrfs(O) zlib_deflate libcrc32c ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables ipt_REJECT bridge stp llc nfsd lockd nfs_acl auth_rpcgss exportfs autofs4 sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb3i libcxgbi cxgb3 mdio ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ext3 jbd dm_mirror dm_region_hash dm_log dm_mod kvm_intel kvm ppdev sg parport_pc parport coretemp hwmon i2c_i801 pcspkr iTCO_wdt iTCO_vendor_support sky2 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd soundcore snd_page_alloc ext4 mbcache jbd2 sd_mod crc_t10dif pata_acpi ata_generic ata_piix i915 drm_kms_ helper drm i2c_algo_bit i2c_core video [last unloaded: btrfs] Pid: 4604, comm: btrfs-cleaner Tainted: G W O 3.4.0-rc4+ #11 LENOVO QiTianM7150/To be filled by O.E.M. RIP: 0010:[] [] btrfs_clean_old_snapshots+0x1d0/0x1e0 [btrfs] RSP: 0018:ffff880057113df0 EFLAGS: 00010286 RAX: 00000000ffff8800 RBX: ffff880057113e10 RCX: ffff880052166780 RDX: ffff880057113e10 RSI: ffff880057113e10 RDI: ffff880052166780 RBP: ffff880057113e60 R08: ffff880057113e10 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff880000000000 R13: 0000160000000000 R14: ffff880079ecb800 R15: ffff880057113e20 FS: 0000000000000000(0000) GS:ffff88007da80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000003842cd3ac0 CR3: 00000000542eb000 CR4: 00000000000407e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process btrfs-cleaner (pid: 4604, threadinfo ffff880057112000, task ffff880075d60b30) Stack: ffff880052166780 ffff880076918000 ffff880057113fd8 ffff880052166400 ffff880052166780 ffff880052166780 ffff880052166f80 ffff880079f16f80 ffff880057113e80 ffff880079ecb800 ffff880057113e80 ffff880057113e98 Call Trace: [] cleaner_kthread+0x160/0x1c0 [btrfs] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [] kthread+0x9e/0xb0 [] kernel_thread_helper+0x4/0x10 [] ? kthread_freezable_should_stop+0x70/0x70 [] ? gs_change+0x13/0x13 Code: 22 b2 e0 31 c9 31 f6 ba 01 00 00 00 4c 89 e7 e8 47 24 ff ff 48 39 5d b0 75 d9 48 83 c4 48 31 c0 5b 41 5c 41 5d 41 5e 41 5f c9 c3 <0f> 0b eb fe 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 53 RIP [] btrfs_clean_old_snapshots+0x1d0/0x1e0 [btrfs] RSP ---[ end trace 504e7bc5e13ed459 ]--- kernel BUG at fs/btrfs/transaction.c:1550! refers to int btrfs_clean_old_snapshots(struct btrfs_root *root) { [...] while (!list_empty(&list)) { [...] BUG_ON(ret < 0); ---> the bug } thanks, liubo