On 05/11/2018 05:50, kernel test robot wrote: > FYI, we noticed the following commit (built with gcc-7): > > commit: 7cc93f268e0ea46570963aa6e09c44abe3732efe ("Btrfs: fix deadlock on > tree root leaf when finding free extent") > https://github.com/0day-ci/linux > UPDATE-20181023-032539/fdmanana-kernel-org/Btrfs-fix-deadlock-on-tree-root-leaf-when-finding-free-extent/20181022-173541 Hi, You are testing an earlier version of the patch that introduced -ENOSPC errors. Commit 7cc93f268e0ea46570963aa6e09c44abe3732efe doesn't exist anymore and got replaced by commit 931e9658e7b52b9e8aacf30e6d7dbfc57b7c67be (the latest version of the patch without the -ENOSPC regression). thanks > > in testcase: xfstests > with following parameters: > > disk: 6HDD > fs: btrfs > test: btrfs-group1 > > test-description: xfstests is a regression test suite for xfs and other files > ystems. > test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git > > > on test machine: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3 -smp 2 -m > 4G > > caused below changes (please refer to attached dmesg/kmsg for entire > log/backtrace): > > > +--------------------------------------------------------------------------------------+-------+------------+ > | > | v4.19 | 7cc93f268e | > +--------------------------------------------------------------------------------------+-------+------------+ > | boot_successes > | 5027 | 6 | > | boot_failures > | 1199 | 29 | > | WARNING:stack_recursion > | 772 | | > | WARNING:at#for_ip_swapgs_restore_regs_and_return_to_usermode/0x > | 687 | | > | cpu_clock_throttled > | 83 | | > | WARNING:at#for_ip_interrupt_entry/0x > | 96 | | > | WARNING:at_ip_xfs_inode_item_format/0x > | 2 | | > | WARNING:at_ip_fsnotify/0x > | 82 | | > | WARNING:at_ip__slab_free/0x > | 17 | | > | WARNING:at_ip__mutex_lock/0x > | 3 | | > | WARNING:at_ip_perf_event_mmap_output/0x > | 2 | | > | WARNING:at_ip_native_sched_clock/0x > | 5 | | > | WARNING:at_ip_ip_finish_output2/0x > | 3 | | > | WARNING:at_drivers/gpu/drm/drm_vblank.c:#drm_wait_one_vblank[drm] > | 20 | | > | RIP:drm_wait_one_vblank[drm] > | 20 | | > | WARNING:at_ip___perf_sw_event/0x > | 4 | | > | PANIC:double_fault > | 1 | | > | WARNING:stack_going_in_the_wrong_direction?ip=double_fault/0x > | 1 | | > | RIP:error_entry > | 1 | | > | stack_segment:#[##] > | 2 | | > | RIP:kmem_cache_alloc > | 2 | | > | Kernel_panic-not_syncing:Fatal_exception > | 4 | 3 | > | general_protection_fault:#[##] > | 1 | | > | RIP:__rb_erase_color > | 1 | | > | WARNING:at_ip_do_sys_poll/0x > | 3 | | > | WARNING:at_ip__netif_receive_skb_core/0x > | 1 | | > | WARNING:at_ip__x64_sys_io_submit/0x > | 2 | | > | WARNING:at_ip_generic_make_request/0x > | 1 | | > | WARNING:at_ip_smp_call_function_single/0x > | 5 | | > | WARNING:at_ip_do_filp_open/0x > | 1 | | > | WARNING:DIRECTORY_MODE_IS_ENABLED.SOME_ERROR_INJECTIONS_MIGHT_NOT_WORK > | 2 | | > | BUG:kernel_hang_in_test_stage > | 23 | 2 | > | BUG:soft_lockup-CPU##stuck_for#s > | 60 | | > | RIP:simple_write_begin > | 1 | | > | Kernel_panic-not_syncing:softlockup:hung_tasks > | 60 | | > | BUG:kernel_timeout_in_test_stage > | 3 | | > | Assertion_failed > | 10 | | > | WARNING:at_fs/xfs/xfs_message.c:#assfail[xfs] > | 10 | | > | RIP:assfail[xfs] > | 10 | | > | WARNING:at_include/linux/quotaops.h:#dquot_disable > | 1 | | > | RIP:dquot_disable > | 1 | | > | BUG:unable_to_handle_kernel > | 1 | 3 | > | Oops:#[##] > | 1 | 3 | > | RIP:raid#_sse21_gen_syndrome[raid#_pq] > | 1 | 3 | > | RIP:e1000_xmit_frame > | 23 | | > | RIP:_raw_spin_unlock_irqrestore > | 19 | | > | RIP:__do_softirq > | 7 | | > | RIP:native_safe_halt > | 51 | | > | RIP:smp_call_function_single > | 11 | | > | RIP:e1000_watchdog > | 3 | | > | BUG:kernel_reboot-without-warning_in_test_stage > | 2 | | > | RIP:smp_call_function_many > | 1 | | > | RIP:e1000_clean > | 7 | | > | RIP:_cond_resched > | 1 | | > | RIP:e1000_alloc_rx_buffers > | 2 | | > | RIP:native_queued_spin_lock_slowpath > | 1 | | > | WARNING:at_net/sched/sch_generic.c:#dev_watchdog > | 50 | | > | RIP:dev_watchdog > | 50 | | > | watchdog:BUG:soft_lockBUG:kernel_hang_in_test_stage > | 1 | | > | RIP:__pollwait > | 1 | | > | INFO:rcu_sched_detected_stalls_on_CPUs/tasks > | 1 | | > | RIP:page_remove_rmap > | 1 | | > | WARNING:at_fs/btrfs/disk-io.c:#btrfs_free_fs_root[btrfs] > | 2 | | > | RIP:btrfs_free_fs_root[btrfs] > | 2 | | > | WARNING:at_fs/btrfs/extent-tree.c:#btrfs_put_block_group[btrfs] > | 6 | | > | RIP:btrfs_put_block_group[btrfs] > | 6 | | > | WARNING:at_fs/btrfs/extent-tree.c:#btrfs_free_block_groups[btrfs] > | 6 | | > | RIP:btrfs_free_block_groups[btrfs] > | 6 | | > | RIP:xfs_trans_committed_bulk[xfs] > | 2 | | > | WARNING:at_fs/iomap.c:#iomap_dio_actor > | 1 | | > | RIP:iomap_dio_actor > | 1 | | > | WARNING:at_arch/x86/kernel/stacktrace.c:#save_stack_trace_user > | 20 | | > | RIP:save_stack_trace_user > | 20 | | > | RIP:finish_task_switch > | 2 | | > | WARNING:at_kernel/trace/ring_buffer.c:#rb_set_head_page > | 7 | | > | RIP:rb_set_head_page > | 7 | | > | BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h > | 40 | | > | invoked_oom-killer:gfp_mask=0x > | 120 | | > | Mem-Info > | 120 | 1 | > | Out_of_memory:Kill_process > | 50 | | > | Out_of_memory_and_no_killable_processes > | 66 | | > | Kernel_panic-not_syncing:System_is_deadlocked_on_memory > | 66 | | > | WARNING:at_net/wireless/ibss.c:#__cfg80211_ibss_joined[cfg80211] > | 5 | | > | RIP:__cfg80211_ibss_joined[cfg80211] > | 5 | | > | RIP:copy_user_generic_unrolled > | 4 | | > | > WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_tx[mac80211_hwsim] > | 2 | | > | RIP:mac80211_hwsim_tx[mac80211_hwsim] > | 2 | | > | RIP:profile_graph_entry > | 1 | | > | > WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_roc[mac80211_hwsim] > | 2 | | > | RIP:mac80211_hwsim_roc[mac80211_hwsim] > | 2 | | > | RIP:copy_user_enhanced_fast_string > | 1 | | > | RIP:kvm_sched_clock_read > | 1 | | > | WARNING:at_kernel/tracepoint.c:#tracepoint_probe_unregister > | 1 | | > | RIP:tracepoint_probe_unregister > | 1 | | > | RIP:__put_user_4 > | 4 | | > | RIP:native_write_msr > | 6 | | > | RIP:tracing_generic_entry_update > | 1 | | > | RIP:trace_clock_local > | 1 | | > | RIP:do_syscall_64 > | 1 | | > | WARNING:at_kernel/trace/trace.c:#trace_buffered_event_disable > | 2 | | > | RIP:trace_buffered_event_disable > | 2 | | > | WARNING:at_kernel/trace/ftrace.c:#ftrace_bug > | 1 | | > | RIP:ftrace_bug > | 1 | | > | RIP:ftrace_push_return_trace > | 1 | | > | BUG:kernel_in_stage > | 16 | | > | End_of_test:RCU_HOTPLUG > | 22 | | > | WARNING:at_net/mac80211/tx.c:#__ieee80211_csa_update_counter[mac80211] > | 2 | | > | RIP:__ieee80211_csa_update_counter[mac80211] > | 2 | | > | RIP:console_unlock > | 2 | | > | RIP:exit_to_usermode_loop > | 1 | | > | BUG:kernel_hang_in_boot_stage > | 1 | | > | WARNING:at_fs/btrfs/transaction.c:#cleanup_transaction[btrfs] > | 0 | 23 | > | RIP:cleanup_transaction[btrfs] > | 0 | 23 | > +--------------------------------------------------------------------------------------+-------+------------+ > > > > [ 1332.863174] WARNING: CPU: 0 PID: 1189 at fs/btrfs/transaction.c:1846 > cleanup_transaction+0x20d/0x2f0 [btrfs] > [ 1332.866072] Modules linked in: btrfs xor zstd_decompress zstd_compress > xxhash raid6_pq dm_flakey dm_mod sr_mod cdrom sg ppdev snd_pcm ata_generic > pata_acpi snd_timer snd soundcore serio_raw pcspkr ata_piix i2c_piix4 libata > floppy parport_pc parport ip_tables [last unloaded: xor] > [ 1332.872009] CPU: 0 PID: 1189 Comm: umount Not tainted > 4.19.0-00001-g7cc93f2 #1 > [ 1332.873963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > 1.10.2-1 04/01/2014 > [ 1332.876213] RIP: 0010:cleanup_transaction+0x20d/0x2f0 [btrfs] > [ 1332.877678] Code: 59 de bf e1 48 8b 03 48 85 c0 75 e8 65 ff 0d 1a 0a e1 5f > e9 59 ff ff ff 89 ce 48 c7 c7 28 20 2a a0 89 4c 24 04 e8 a3 86 e8 e0 <0f> 0b > 8b 4c 24 04 e9 73 fe ff ff 48 8b bd 08 03 00 00 be 03 00 00 > [ 1332.882362] RSP: 0018:ffffc90003717d10 EFLAGS: 00010286 > [ 1332.883732] RAX: 0000000000000000 RBX: ffff88007c227800 RCX: > 0000000000000000 > [ 1332.885496] RDX: ffff88013fc1ef40 RSI: ffff88013fc16898 RDI: > ffff88013fc16898 > [ 1332.887229] RBP: ffff88007a9c0000 R08: 0000000000000000 R09: > 0000000000000a2b > [ 1332.888995] R10: ffff88007c2272a8 R11: ffffffff82f88fcd R12: > ffff8800bb699410 > [ 1332.890733] R13: ffff88007c227800 R14: 00000000ffffffe4 R15: > ffff88007a9cc900 > [ 1332.894990] FS: 00007f9457f672c0(0000) GS:ffff88013fc00000(0000) > knlGS:0000000000000000 > [ 1332.897140] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 1332.902712] CR2: 000055c8f6d83168 CR3: 000000007bc48000 CR4: > 00000000000006f0 > [ 1332.904474] Call Trace: > [ 1332.905317] ? finish_wait+0x80/0x80 > [ 1332.906376] btrfs_commit_transaction+0x8de/0x940 [btrfs] > [ 1332.907791] ? start_transaction+0x9d/0x3d0 [btrfs] > [ 1332.909132] close_ctree+0x2bc/0x300 [btrfs] > [ 1332.910300] generic_shutdown_super+0x6c/0x120 > [ 1332.911526] kill_anon_super+0xe/0x30 > [ 1332.912607] btrfs_kill_super+0x13/0x100 [btrfs] > [ 1332.913849] deactivate_locked_super+0x3f/0x70 > [ 1332.915085] cleanup_mnt+0x3b/0x80 > [ 1332.916082] task_work_run+0xa3/0xe0 > [ 1332.917110] exit_to_usermode_loop+0xd3/0xe0 > [ 1332.918297] do_syscall_64+0x16c/0x180 > [ 1332.919370] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > [ 1332.920697] RIP: 0033:0x7f945784bb37 > [ 1332.921753] Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 > 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d > 01 f0 ff ff 73 01 c3 48 8b 0d 31 03 2b 00 f7 d8 64 89 01 48 > [ 1332.926295] RSP: 002b:00007ffd5931fb98 EFLAGS: 00000246 ORIG_RAX: > 00000000000000a6 > [ 1332.928344] RAX: 0000000000000000 RBX: 000055c8f6d79080 RCX: > 00007f945784bb37 > [ 1332.930087] RDX: 0000000000000001 RSI: 0000000000000000 RDI: > 000055c8f6d7c7d0 > [ 1332.931850] RBP: 000055c8f6d7c7d0 R08: 00007f9457afcb88 R09: > 0000000000000020 > [ 1332.933600] R10: 00000000000006b4 R11: 0000000000000246 R12: > 00007f9457d4de64 > [ 1332.935369] R13: 0000000000000000 R14: 000055c8f6d79260 R15: > 00007ffd5931fe20 > [ 1332.937120] ---[ end trace ae2f8cd767d9d315 ]--- > > > To reproduce: > > git clone https://github.com/intel/lkp-tests.git > cd lkp-tests > bin/lkp qemu -k <bzImage> job-script # job-script is attached in this > email > > > > Thanks, > Rong Chen >