Hello, Using kernel 3.14.25; I was doing multiple snapshot deletions and at the same time deletion of multiple trees in remaining snapshots, in parallel (3 'rm -rf' running in background). All of this lead to "soft lock-up" of one CPU, with warnings every 22-23 seconds and no activity on disks. Sadly I didn't manage to save those, my running programs locked up one by one, and I had to hard-reset the machine. Now I have these (below) repeating every 30 seconds or so. What's the problem and how to fix it, will btrfsck help here? [ 6950.651788] ------------[ cut here ]------------ [ 6950.651815] WARNING: CPU: 3 PID: 2179 at fs/btrfs/delayed-inode.c:1407 btrfs_assert_delayed_root_empty+0x2f/0x40 [btrfs]() [ 6950.651816] Modules linked in: tun cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative fuse 8021q garp mrp bridge stp llc tcp_illinois loop it87 hwmon_vid ecryptfs kvm_amd uvcvideo kvm eeepc_wmi videobuf2_vmalloc snd_usb_audio asus_wmi snd_hda_codec_realtek videobuf2_memops crct10dif_pclmul crc32_pclmul crc32c_intel videobuf2_core snd_hda_codec_generic snd_usbmidi_lib ghash_clmulni_intel sparse_keymap snd_hda_intel videodev aesni_intel snd_pcsp cp210x rfkill snd_rawmidi snd_hda_codec aes_x86_64 media video lrw usbserial edac_mce_amd acpi_cpufreq sp5100_tco tpm_infineon snd_seq_device snd_hwdep gf128mul k10temp snd_pcm_oss mxm_wmi snd_mixer_oss glue_helper fam15h_power psmouse i2c_piix4 i2c_core serio_raw joydev evdev edac_core tpm_tis snd_pcm ablk_helper wmi processor tpm snd_timer cryptd snd thermal_sys button soundcore ext4 crc16 mbcache jbd2 crc32c btrfs dm_mod raid1 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq md_mod nbd sa ta_nv hid_generic usbhid hid sg sd_mod crc_t10dif crct10dif_common ahci libahci sata_mv ohci_pci libata ehci_pci ohci_hcd ehci_hcd xhci_hcd r8169 scsi_mod mii usbcore usb_common [ 6950.651853] CPU: 3 PID: 2179 Comm: btrfs-transacti Tainted: G W 3.14.25-rm1+ #79 [ 6950.651855] Hardware name: To be filled by O.E.M. To be filled by O.E.M./M5A97 LE R2.0, BIOS 2501 04/09/2014 [ 6950.651856] 0000000000000009 ffff88040216fd88 ffffffff814e74e5 0000000000000007 [ 6950.651859] 0000000000000000 ffff88040216fdc8 ffffffff81062777 ffff880408c55000 [ 6950.651861] ffff880051a25380 0000000000000000 ffff880408c55000 ffff88008d5bb220 [ 6950.651863] Call Trace: [ 6950.651868] [<ffffffff814e74e5>] dump_stack+0x46/0x58 [ 6950.651871] [<ffffffff81062777>] warn_slowpath_common+0x87/0xb0 [ 6950.651872] [<ffffffff810627b5>] warn_slowpath_null+0x15/0x20 [ 6950.651884] [<ffffffffa02a7d5f>] btrfs_assert_delayed_root_empty+0x2f/0x40 [btrfs] [ 6950.651894] [<ffffffffa02569ef>] btrfs_commit_transaction+0x39f/0x920 [btrfs] [ 6950.651896] [<ffffffff8106d8a0>] ? call_timer_fn+0xf0/0xf0 [ 6950.651907] [<ffffffffa0254985>] transaction_kthread+0x1c5/0x240 [btrfs] [ 6950.651917] [<ffffffffa02547c0>] ? open_ctree+0x1f60/0x1f60 [btrfs] [ 6950.651919] [<ffffffff81084044>] kthread+0xc4/0xe0 [ 6950.651921] [<ffffffff81010000>] ? ftrace_raw_event_xen_cpu_write_ldt_entry+0x10/0x170 [ 6950.651923] [<ffffffff81083f80>] ? flush_kthread_worker+0x70/0x70 [ 6950.651925] [<ffffffff814f568c>] ret_from_fork+0x7c/0xb0 [ 6950.651927] [<ffffffff81083f80>] ? flush_kthread_worker+0x70/0x70 [ 6950.651928] ---[ end trace facf5add31ff6951 ]--- -- With respect, Roman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
