I got this error when deleting around a hundred snapshots with kernel 3.13.0 and btrfs-progs 3.12:
[ 831.628833] [sched_delayed] sched: RT throttling activated [ 858.586718] BUG: soft lockup - CPU#1 stuck for 22s! [btrfs-transacti:643] [ 858.586721] Modules linked in: ipt_MASQUERADE xt_CHECKSUM tun ip6t_rpfilter ip6t_REJECT xt_conntrack bnep bluetooth cfg80211 ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw iTCO_wdt eeepc_wmi iTCO_vendor_support asus_wmi sparse_keymap rfkill snd_hda_codec_hdmi vfat fat x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul snd_hda_codec_realtek crc32c_intel ghash_clmulni_intel uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core microcode videodev snd_usb_audio snd_hda_intel media snd_usbmidi_lib serio_raw [ 858.586742] snd_hda_codec snd_rawmidi i2c_i801 snd_hwdep snd_seq mceusb snd_seq_device rc_core r8169 snd_pcm mii lpc_ich mfd_core snd_page_alloc snd_timer snd mei_me mei soundcore shpchp wmi binfmt_misc usb_storage btrfs libcrc32c xor raid6_pq radeon i2c_algo_bit drm_kms_helper ttm drm i2c_core video [ 858.586754] CPU: 1 PID: 643 Comm: btrfs-transacti Not tainted 3.13.0-1.fc20.x86_64 #1 [ 858.586755] Hardware name: System manufacturer System Product Name/P8Z68-V LE, BIOS 4101 05/09/2013 [ 858.586756] task: ffff8803ff9133c0 ti: ffff880002898000 task.ti: ffff880002898000 [ 858.586757] RIP: 0010:[<ffffffffa029eea1>] [<ffffffffa029eea1>] comp_entry+0x11/0x1b0 [btrfs] [ 858.586767] RSP: 0018:ffff880002899c00 EFLAGS: 00000246 [ 858.586768] RAX: 0000035f45c00000 RBX: ffff880002899b98 RCX: 00000000000000b8 [ 858.586769] RDX: 0000000000000000 RSI: ffff8802e5a4fae0 RDI: ffff88037a7a8360 [ 858.586769] RBP: ffff880002899c18 R08: 0000000000000000 R09: 0000000000000000 [ 858.586770] R10: ffffffffa029fa3f R11: ffffea000bc7fac0 R12: ffff880403d5b100 [ 858.586771] R13: 00000001002a0001 R14: ffffffff00000000 R15: 002a000002899b80 [ 858.586772] FS: 0000000000000000(0000) GS:ffff88041ec40000(0000) knlGS:0000000000000000 [ 858.586772] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 858.586773] CR2: 0000000002beb018 CR3: 000000000dc0c000 CR4: 00000000000407e0 [ 858.586774] Stack: [ 858.586774] ffff88037a7a8360 0000300900000000 ffff8802e5a4d300 ffff880002899c70 [ 858.586776] ffffffffa029f8b5 ffff8802f31dd660 ffff880404ab4be0 ffff88037a7a8360 [ 858.586777] 0000000100000000 ffff88031c7e3cc0 ffff8802f31dd660 0000000000000000 [ 858.586779] Call Trace: [ 858.586787] [<ffffffffa029f8b5>] btrfs_merge_delayed_refs+0xe5/0x3d0 [btrfs] [ 858.586793] [<ffffffffa0246e74>] run_clustered_refs+0x84/0x1080 [btrfs] [ 858.586798] [<ffffffffa02472af>] ? run_clustered_refs+0x4bf/0x1080 [btrfs] [ 858.586803] [<ffffffffa02472af>] ? run_clustered_refs+0x4bf/0x1080 [btrfs] [ 858.586809] [<ffffffffa024bb70>] btrfs_run_delayed_refs+0xe0/0x530 [btrfs] [ 858.586815] [<ffffffffa025bb0e>] btrfs_commit_transaction+0x4e/0x940 [btrfs] [ 858.586821] [<ffffffffa0257c25>] transaction_kthread+0x1c5/0x250 [btrfs] [ 858.586827] [<ffffffffa0257a60>] ? btrfs_cleanup_transaction+0x520/0x520 [btrfs] [ 858.586830] [<ffffffff8108f3b2>] kthread+0xd2/0xf0 [ 858.586831] [<ffffffff8108f2e0>] ? insert_kthread_work+0x40/0x40 [ 858.586833] [<ffffffff8169503c>] ret_from_fork+0x7c/0xb0 [ 858.586835] [<ffffffff8108f2e0>] ? insert_kthread_work+0x40/0x40 [ 858.586835] Code: b4 eb 2c a0 48 89 55 e8 e8 2d e8 dc e0 48 8b 55 e8 e9 1e ff ff ff 0f 1f 40 00 66 66 66 66 90 55 48 89 e5 41 55 41 54 49 89 fc 53 <48> 8b 47 18 48 89 f3 48 39 46 18 0f 82 be 00 00 00 0f 87 90 00 [ 858.622675] BUG: soft lockup - CPU#4 stuck for 22s! [btrfs-cleaner:642] [ 858.622677] Modules linked in: ipt_MASQUERADE xt_CHECKSUM tun ip6t_rpfilter ip6t_REJECT xt_conntrack bnep bluetooth cfg80211 ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw iTCO_wdt eeepc_wmi iTCO_vendor_support asus_wmi sparse_keymap rfkill snd_hda_codec_hdmi vfat fat x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul snd_hda_codec_realtek crc32c_intel ghash_clmulni_intel uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core microcode videodev snd_usb_audio snd_hda_intel media snd_usbmidi_lib serio_raw [ 858.622698] snd_hda_codec snd_rawmidi i2c_i801 snd_hwdep snd_seq mceusb snd_seq_device rc_core r8169 snd_pcm mii lpc_ich mfd_core snd_page_alloc snd_timer snd mei_me mei soundcore shpchp wmi binfmt_misc usb_storage btrfs libcrc32c xor raid6_pq radeon i2c_algo_bit drm_kms_helper ttm drm i2c_core video [ 858.622711] CPU: 4 PID: 642 Comm: btrfs-cleaner Not tainted 3.13.0-1.fc20.x86_64 #1 [ 858.622712] Hardware name: System manufacturer System Product Name/P8Z68-V LE, BIOS 4101 05/09/2013 [ 858.622713] task: ffff8803ff915640 ti: ffff880002896000 task.ti: ffff880002896000 [ 858.622714] RIP: 0010:[<ffffffff8168cb48>] [<ffffffff8168cb48>] _raw_spin_lock+0x28/0x40 [ 858.622718] RSP: 0018:ffff880002897c40 EFLAGS: 00000297 [ 858.622718] RAX: 0000000000008d1a RBX: ffff880002897c48 RCX: 0000000000008d1b [ 858.622719] RDX: 0000000000008d1b RSI: 0000000000000050 RDI: ffff8800d781e598 [ 858.622720] RBP: ffff880002897c40 R08: 000000000001b680 R09: ffffffffa029fe74 [ 858.622721] R10: ffff880404a22510 R11: ffff880404ab00a0 R12: ffffffff8114a6ca [ 858.622721] R13: ffff880002897bc0 R14: ffffffff00000000 R15: ffffea000b552680 [ 858.622722] FS: 0000000000000000(0000) GS:ffff88041ed00000(0000) knlGS:0000000000000000 [ 858.622723] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 858.622724] CR2: 00007fff278fcff8 CR3: 000000000dc0c000 CR4: 00000000000407e0 [ 858.622724] Stack: [ 858.622725] ffff880002897cb8 ffffffffa029fe99 ffff880391c11000 0000000000000272 [ 858.622727] ffff880002897d18 ffffffffa023facd ffff8802d5081cc0 000003525ee3e000 [ 858.622728] ffff880406ee6000 000003525a110000 ffff8802d507fb80 ffff880391c11000 [ 858.622729] Call Trace: [ 858.622742] [<ffffffffa029fe99>] btrfs_add_delayed_tree_ref+0x89/0x160 [btrfs] [ 858.622747] [<ffffffffa023facd>] ? __btrfs_mod_ref+0xcd/0x270 [btrfs] [ 858.622753] [<ffffffffa02482fc>] btrfs_free_tree_block+0x8c/0x280 [btrfs] [ 858.622758] [<ffffffffa02485b5>] walk_up_proc+0xc5/0x410 [btrfs] [ 858.622764] [<ffffffffa0248a31>] walk_up_tree+0x131/0x1f0 [btrfs] [ 858.622769] [<ffffffffa024a2c8>] btrfs_drop_snapshot+0x3e8/0x780 [btrfs] [ 858.622776] [<ffffffffa025d244>] btrfs_clean_one_deleted_snapshot+0xb4/0x110 [btrfs] [ 858.622781] [<ffffffffa0254448>] cleaner_kthread+0x128/0x180 [btrfs] [ 858.622787] [<ffffffffa0254320>] ? check_leaf.isra.40+0x310/0x310 [btrfs] [ 858.622789] [<ffffffff8108f3b2>] kthread+0xd2/0xf0 [ 858.622791] [<ffffffff8108f2e0>] ? insert_kthread_work+0x40/0x40 [ 858.622792] [<ffffffff8169503c>] ret_from_fork+0x7c/0xb0 [ 858.622794] [<ffffffff8108f2e0>] ? insert_kthread_work+0x40/0x40 [ 858.622795] Code: 0f 1f 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 <f3> 90 0f b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 [ 862.653874] BUG: soft lockup - CPU#7 stuck for 22s! [btrfs-delalloc-:4932] [ 862.653876] Modules linked in: ipt_MASQUERADE xt_CHECKSUM tun ip6t_rpfilter ip6t_REJECT xt_conntrack bnep bluetooth cfg80211 ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw iTCO_wdt eeepc_wmi iTCO_vendor_support asus_wmi sparse_keymap rfkill snd_hda_codec_hdmi vfat fat x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul snd_hda_codec_realtek crc32c_intel ghash_clmulni_intel uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core microcode videodev snd_usb_audio snd_hda_intel media snd_usbmidi_lib serio_raw [ 862.653897] snd_hda_codec snd_rawmidi i2c_i801 snd_hwdep snd_seq mceusb snd_seq_device rc_core r8169 snd_pcm mii lpc_ich mfd_core snd_page_alloc snd_timer snd mei_me mei soundcore shpchp wmi binfmt_misc usb_storage btrfs libcrc32c xor raid6_pq radeon i2c_algo_bit drm_kms_helper ttm drm i2c_core video [ 862.653910] CPU: 7 PID: 4932 Comm: btrfs-delalloc- Not tainted 3.13.0-1.fc20.x86_64 #1 [ 862.653911] Hardware name: System manufacturer System Product Name/P8Z68-V LE, BIOS 4101 05/09/2013 [ 862.653912] task: ffff8803db711140 ti: ffff880093860000 task.ti: ffff880093860000 [ 862.653912] RIP: 0010:[<ffffffff8168cb4a>] [<ffffffff8168cb4a>] _raw_spin_lock+0x2a/0x40 [ 862.653916] RSP: 0018:ffff880093861990 EFLAGS: 00000293 [ 862.653917] RAX: 0000000000008d1a RBX: ffffffffa0274d81 RCX: 0000000000008d1c [ 862.653918] RDX: 0000000000008d1c RSI: 0000000000000050 RDI: ffff8800d781e598 [ 862.653919] RBP: ffff880093861990 R08: 000000000001b680 R09: ffffffffa029fe74 [ 862.653919] R10: 00000000e3398e01 R11: ffffea000d9cc900 R12: ffff880093861938 [ 862.653920] R13: 00000001002e002e R14: ffff880093861900 R15: ffff8800d781e4e8 [ 862.653921] FS: 0000000000000000(0000) GS:ffff88041edc0000(0000) knlGS:0000000000000000 [ 862.653922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 862.653923] CR2: 00007f64f9abd000 CR3: 000000000dc0c000 CR4: 00000000000407e0 [ 862.653923] Stack: [ 862.653924] ffff880093861a08 ffffffffa029fe99 ffff880093861fd8 0000000000000000 [ 862.653926] 000004479ffb3fff 0000000000001001 ffff88009890d770 0000000000000000 [ 862.653927] ffff880406ee6000 000004479ffb3000 ffff88009456cc80 ffff88000b515000 [ 862.653928] Call Trace: [ 862.653939] [<ffffffffa029fe99>] btrfs_add_delayed_tree_ref+0x89/0x160 [btrfs] [ 862.653946] [<ffffffffa0249e12>] btrfs_alloc_free_block+0x372/0x440 [btrfs] [ 862.653951] [<ffffffffa0239605>] split_leaf+0x1a5/0x6c0 [btrfs] [ 862.653956] [<ffffffffa023a420>] btrfs_search_slot+0x900/0x970 [btrfs] [ 862.653961] [<ffffffffa023bdb0>] btrfs_insert_empty_items+0x70/0xc0 [btrfs] [ 862.653965] [<ffffffffa023501a>] ? btrfs_alloc_path+0x1a/0x20 [btrfs] [ 862.653972] [<ffffffffa026234d>] insert_inline_extent+0xbd/0x330 [btrfs] [ 862.653978] [<ffffffffa0262736>] cow_file_range_inline+0x176/0x260 [btrfs] [ 862.653984] [<ffffffffa026416b>] compress_file_range.constprop.54+0x30b/0x5e0 [btrfs] [ 862.653990] [<ffffffffa0264475>] async_cow_start+0x35/0x60 [btrfs] [ 862.653996] [<ffffffffa0288d8c>] worker_loop+0x12c/0x510 [btrfs] [ 862.654003] [<ffffffffa0288c60>] ? btrfs_queue_worker+0x2f0/0x2f0 [btrfs] [ 862.654005] [<ffffffff8108f3b2>] kthread+0xd2/0xf0 [ 862.654007] [<ffffffff8108f2e0>] ? insert_kthread_work+0x40/0x40 [ 862.654008] [<ffffffff8169503c>] ret_from_fork+0x7c/0xb0 [ 862.654010] [<ffffffff8108f2e0>] ? insert_kthread_work+0x40/0x40 [ 862.654010] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
