Hello, My laptop was under normal load when I was thrown to the TTY with a stack trace (pasted at the end of the message). After a reboot, everything was ok, I haven't noticed anything unusual. About my setup: I have a single 128GB SSD, with 3 partitions, 2 of them (my / and /home) being btrfs, with zlib compression enabled. I've never had any other devices attached, and never touched the 'advanced' features of btrfs. The machine is fairly new (between 2 and 3 weeks), and were created using the latest (non-testing) Arch Linux kernel from back then. I run fstrim on a daily cron job, and have autodefrag enabled. From my very limited knowledge, that's all the relevant information I have. If there's anything else I can do I would be glad to help. [ 3850.907821] ------------[ cut here ]------------ [ 3850.907905] kernel BUG at fs/btrfs/inode.c:881! [ 3850.907970] invalid opcode: 0000 [#1] PREEMPT SMP [ 3850.908052] Modules linked in: fuse btusb bluetooth zram(C) uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev media snd_hda_codec_hdmi snd_hda_codec_realtek joydev ext4 crc16 jbd2 mbcache coretemp kvm_intel kvm ghash_clmulni_intel aesni_intel aes_x86_64 aes_generic ablk_helper cryptd arc4 iwldvm mac80211 iTCO_wdt iTCO_vendor_support samsung_laptop evdev microcode iwlwifi pcspkr psmouse serio_raw snd_hda_intel snd_hda_codec snd_hwdep i915 i2c_i801 lpc_ich snd_pcm cfg80211 r8169 snd_page_alloc mii snd_timer rfkill snd soundcore intel_agp intel_gtt mei drm_kms_helper drm i2c_algo_bit i2c_core battery video wmi acpi_cpufreq mperf fan ac thermal button processor btrfs libcrc32c zlib_deflate sd_mod ahci crc32c_intel libahci xhci_hcd libata scsi_mod ehci_hcd usbcore usb_common [ 3850.909356] CPU 1 [ 3850.909393] Pid: 1133, comm: flush-btrfs-2 Tainted: G C 3.6.11-1-ARCH #1 SAMSUNG ELECTRONICS CO., LTD. 900X3B/900X4B/900X3B/900X4B [ 3850.909557] RIP: 0010:[<ffffffffa0144ee5>] [<ffffffffa0144ee5>] cow_file_range+0x495/0x4d0 [btrfs] [ 3850.909712] RSP: 0018:ffff88010a6e56a0 EFLAGS: 00010286 [ 3850.909783] RAX: ffff880105b5c000 RBX: ffff88010a6e5a18 RCX: 00000000008e6fff [ 3850.909876] RDX: ffff88010a506000 RSI: ffff88010a506000 RDI: ffff88011779e088 [ 3850.909970] RBP: ffff88010a6e5760 R08: ffff88010a6e5a04 R09: ffff88010a6e5a18 [ 3850.910063] R10: ffffffffffff1fff R11: 0000000000000001 R12: ffffffffffff2000 [ 3850.910155] R13: 00000000008f5000 R14: 0000000000001000 R15: ffff88005b16a600 [ 3850.910250] FS: 0000000000000000(0000) GS:ffff88011f240000(0000) knlGS:0000000000000000 [ 3850.910355] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 3850.910431] CR2: 00007fe8587a6008 CR3: 000000000180c000 CR4: 00000000000407e0 [ 3850.910523] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 3850.910617] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 3850.910711] Process flush-btrfs-2 (pid: 1133, threadinfo ffff88010a6e4000, task ffff880037a6a850) [ 3850.910823] Stack: [ 3850.910856] 0000000000000000 ffff88009b0ba0a0 0000000000000282 ffff8801081ca000 [ 3850.911042] 00000000008e6fff ffff88005b16a448 ffff88010a6e5710 ffffea00040b8e00 [ 3850.911220] ffff88011779e088 ffff88010a506000 ffff88011757b990 ffff88010a6e5a04 [ 3850.911336] Call Trace: [ 3850.911412] [<ffffffffa0158ef7>] ? free_extent_buffer+0x37/0x90 [btrfs] [ 3850.911538] [<ffffffffa01455ed>] run_delalloc_nocow+0x6cd/0xa50 [btrfs] [ 3850.911651] [<ffffffffa0145cc4>] run_delalloc_range+0x354/0x3a0 [btrfs] [ 3850.911765] [<ffffffffa0157941>] __extent_writepage+0x341/0x7c0 [btrfs] [ 3850.911875] [<ffffffffa0156b30>] ? end_extent_writepage+0x70/0x70 [btrfs] [ 3850.911988] [<ffffffffa01580ca>] extent_write_cache_pages.isra.26.constprop.43+0x30a/0x410 [btrfs] [ 3850.912126] [<ffffffffa0158426>] extent_writepages+0x46/0x60 [btrfs] [ 3850.912260] [<ffffffffa0141400>] ? btrfs_writepage+0x70/0x70 [btrfs] [ 3850.912369] [<ffffffffa0140608>] btrfs_writepages+0x28/0x30 [btrfs] [ 3850.912460] [<ffffffff81128a01>] do_writepages+0x21/0x50 [ 3850.912538] [<ffffffff811a90bb>] __writeback_single_inode.isra.31+0x3b/0x190 [ 3850.912637] [<ffffffff8107a1be>] ? wake_up_bit+0x2e/0x40 [ 3850.912713] [<ffffffff811a989a>] writeback_sb_inodes+0x2ba/0x4a0 [ 3850.912798] [<ffffffff811a9b1f>] __writeback_inodes_wb+0x9f/0xd0 [ 3850.912882] [<ffffffff811a9e63>] wb_writeback+0x313/0x340 [ 3850.912960] [<ffffffff811aa978>] wb_do_writeback+0x258/0x260 [ 3850.913040] [<ffffffff811aaa13>] bdi_writeback_thread+0x93/0x2d0 [ 3850.913124] [<ffffffff811aa980>] ? wb_do_writeback+0x260/0x260 [ 3850.913205] [<ffffffff81079a73>] kthread+0x93/0xa0 [ 3850.913278] [<ffffffff8149b704>] kernel_thread_helper+0x4/0x10 [ 3850.913361] [<ffffffff810799e0>] ? kthread_freezable_should_stop+0x70/0x70 [ 3850.913456] [<ffffffff8149b700>] ? gs_change+0x13/0x13 [ 3850.913524] Code: ff ff ff 48 8b 45 98 49 81 c2 00 10 00 00 49 c1 ea 0c 4c 01 13 c7 00 01 00 00 00 e9 df fe ff ff 49 8b 57 40 e9 4d ff ff ff 0f 0b <0f> 0b 0f 0b 48 8b b5 68 ff ff ff 4c 8b 85 78 ff ff ff 41 b9 3f [ 3850.914058] RIP [<ffffffffa0144ee5>] cow_file_range+0x495/0x4d0 [btrfs] [ 3850.914173] RSP <ffff88010a6e56a0> [ 3850.951718] ---[ end trace 480e17a8f51ef3a3 ]--- -- @renato_bill Renato Zannon
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