Linux ftp2 2.6.37-gentoo-mykernel #1 SMP Tue Jan 11 15:34:57 CET 2011 x86_64 Intel(R) Pentium(R) 4 CPU 3.20GHz GenuineIntel GNU/Linux Jan 21 15:10:09 ftp2 kernel: [ 1798.826026] ------------[ cut here ]------------ Jan 21 15:10:09 ftp2 kernel: [ 1798.826030] kernel BUG at fs/btrfs/inode.c:806! Jan 21 15:10:09 ftp2 kernel: [ 1798.826034] invalid opcode: 0000 [#1] SMP Jan 21 15:10:09 ftp2 kernel: [ 1798.826038] last sysfs file: /sys/devices/platform/it87.656/name Jan 21 15:10:09 ftp2 kernel: [ 1798.826041] CPU 0 Jan 21 15:10:09 ftp2 kernel: [ 1798.826044] Modules linked in: btrfs zlib_deflate crc32c libcrc32c tun it87 hwmon_vid nfsd lockd auth_rpcgss sunrpc exportfs fuse dummy dm_mod ehci_hc d uhci_hcd i2c_i801 r8169 usbcore intel_agp iTCO_wdt sg mii i2c_core intel_gtt pcspkr iTCO_vendor_support processor button Jan 21 15:10:09 ftp2 kernel: [ 1798.826225] Jan 21 15:10:09 ftp2 kernel: [ 1798.826232] Pid: 5155, comm: flush-btrfs-1 Not tainted 2.6.37-gentoo-mykernel #1 945GCM-S2L/945GCM-S2L Jan 21 15:10:09 ftp2 kernel: [ 1798.826237] RIP: 0010:[<ffffffffa02a25c1>] [<ffffffffa02a25c1>] cow_file_range+0x1b3/0x30d [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.826289] RSP: 0018:ffff88005b4938b0 EFLAGS: 00010286 Jan 21 15:10:09 ftp2 kernel: [ 1798.826297] RAX: 00000000ffffffe4 RBX: ffff88007ba53800 RCX: 00000000ffffffe4 Jan 21 15:10:09 ftp2 kernel: [ 1798.826302] RDX: 0000000000000001 RSI: 0000000000000706 RDI: ffff88007ac18ab8 Jan 21 15:10:09 ftp2 kernel: [ 1798.826308] RBP: 0000000019f5e000 R08: 0000000000000002 R09: 0000000000000005 Jan 21 15:10:09 ftp2 kernel: [ 1798.826313] R10: 0000000000000000 R11: ffffffff8158b993 R12: ffff880052b0fad8 Jan 21 15:10:09 ftp2 kernel: [ 1798.826319] R13: 0000000000001000 R14: 0000000000001000 R15: ffff88004daa1100 Jan 21 15:10:09 ftp2 kernel: [ 1798.826324] FS: 0000000000000000(0000) GS:ffff88007f400000(0000) knlGS:0000000000000000 Jan 21 15:10:09 ftp2 kernel: [ 1798.826329] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b Jan 21 15:10:09 ftp2 kernel: [ 1798.826333] CR2: 0000000000620000 CR3: 000000007b234000 CR4: 00000000000006f0 Jan 21 15:10:09 ftp2 kernel: [ 1798.826364] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Jan 21 15:10:09 ftp2 kernel: [ 1798.826377] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Jan 21 15:10:09 ftp2 kernel: [ 1798.826383] Process flush-btrfs-1 (pid: 5155, threadinfo ffff88005b492000, task ffff88007cb55320) Jan 21 15:10:09 ftp2 kernel: [ 1798.826392] Stack: Jan 21 15:10:09 ftp2 kernel: [ 1798.826398] ffffffffffffffff ffff88005b493910 0000000000000001 0000000019f6dfff Jan 21 15:10:09 ftp2 kernel: [ 1798.826415] ffff880052b0f988 000001f22c139000 0000000000010000 ffff880052b0f958 Jan 21 15:10:09 ftp2 kernel: [ 1798.826425] ffff880052b0f960 0000000019f5dfff ffff880052b0f950 ffffea0000e77dc8 Jan 21 15:10:09 ftp2 kernel: [ 1798.826434] Call Trace: Jan 21 15:10:09 ftp2 kernel: [ 1798.826489] [<ffffffffa02a2de4>] ? run_delalloc_range+0xa7/0x320 [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.826526] [<ffffffffa02bb547>] ? find_lock_delalloc_range+0x19c/0x1be [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.826546] [<ffffffffa02bb74f>] ? __extent_writepage+0x1e6/0x620 [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.826565] [<ffffffffa02b8bd4>] ? end_bio_extent_writepage+0x0/0x14a [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.826605] [<ffffffffa02bbde7>] ? T.892+0x145/0x240 [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.826624] [<ffffffffa02bbfd2>] ? extent_writepages+0x40/0x56 [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.826669] [<ffffffffa02a4072>] ? btrfs_get_extent+0x0/0x77d [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.826690] [<ffffffff810c6f52>] ? writeback_single_inode+0x99/0x1ad Jan 21 15:10:09 ftp2 kernel: [ 1798.826697] [<ffffffff810c72e7>] ? writeback_sb_inodes+0x95/0x104 Jan 21 15:10:09 ftp2 kernel: [ 1798.826716] [<ffffffff810c7b39>] ? writeback_inodes_wb+0xee/0x100 Jan 21 15:10:09 ftp2 kernel: [ 1798.826721] [<ffffffff810c7cd7>] ? wb_writeback+0x18c/0x20b Jan 21 15:10:09 ftp2 kernel: [ 1798.826739] [<ffffffff810c7da1>] ? wb_do_writeback+0x4b/0x14f Jan 21 15:10:09 ftp2 kernel: [ 1798.826748] [<ffffffff8103dc43>] ? process_timeout+0x0/0xa Jan 21 15:10:09 ftp2 kernel: [ 1798.826756] [<ffffffff810c7f24>] ? bdi_writeback_thread+0x7f/0x13f Jan 21 15:10:09 ftp2 kernel: [ 1798.826766] [<ffffffff8107a88f>] ? perf_event_exit_task+0xb9/0x1bf Jan 21 15:10:09 ftp2 kernel: [ 1798.826796] [<ffffffff810c7ea5>] ? bdi_writeback_thread+0x0/0x13f Jan 21 15:10:09 ftp2 kernel: [ 1798.826801] [<ffffffff810c7ea5>] ? bdi_writeback_thread+0x0/0x13f Jan 21 15:10:09 ftp2 kernel: [ 1798.826823] [<ffffffff810487c3>] ? kthread+0x7a/0x82 Jan 21 15:10:09 ftp2 kernel: [ 1798.826839] [<ffffffff810035d4>] ? kernel_thread_helper+0x4/0x10 Jan 21 15:10:09 ftp2 kernel: [ 1798.826854] [<ffffffff81048749>] ? kthread+0x0/0x82 Jan 21 15:10:09 ftp2 kernel: [ 1798.826864] [<ffffffff810035d0>] ? kernel_thread_helper+0x0/0x10 Jan 21 15:10:09 ftp2 kernel: [ 1798.826872] Code: c0 48 89 de 4c 89 ff 48 c7 44 24 10 01 00 00 00 48 89 54 24 08 48 8b 54 24 30 48 c7 04 24 ff ff ff ff e8 36 d7 fe ff 85 c0 74 04 <0f> 0b eb fe bf 50 00 00 00 e8 5e 98 00 00 48 89 68 18 48 89 68 Jan 21 15:10:09 ftp2 kernel: [ 1798.827155] RIP [<ffffffffa02a25c1>] cow_file_range+0x1b3/0x30d [btrfs] Jan 21 15:10:09 ftp2 kernel: [ 1798.827177] RSP <ffff88005b4938b0> Jan 21 15:10:09 ftp2 kernel: [ 1798.846607] ---[ end trace ebf1ea17a91154fa ]---
Please provide some more details that should help the kernel team make sense of your bug: * output of 'emerge --info' * attach .config for your kernel * describe what your system was doing when oops occurred - compiling? * is it reproducible, or did it happen just once? * do you have messages about "0 blocks of free space" above the cut line in the oops message? If so, it could be a bug related to running low on free space http://www.spinics.net/lists/linux-btrfs/msg07268.html http://www.spinics.net/lists/linux-btrfs/msg07326.html so also check whether the btrfs partition was rather full
