From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Schmidt Subject: BUG at fs/btrfs/inode.c:841! Date: Mon, 05 Dec 2011 14:49:16 +0100 Message-ID: <4EDCCBDC.1000402@jan-o-sch.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: Josef Bacik , Chris Mason To: linux-btrfs Return-path: List-ID: While running xfstest 013 with Chris' for-linus on an ssd I hit this the following bug. Before, the system was freshly bootet and all I did was insmod and starting "./check" in the xfstests directory. I cannot reproduce it so far: Dec 5 14:22:18 oglaroon kernel: [ 1284.890509] device fsid f3549a38-35ea-4fc4-a027-d473bc226620 devid 1 transid 15537 /dev/sdv2 Dec 5 14:22:18 oglaroon kernel: [ 1284.894758] Btrfs detected SSD devices, enabling SSD mode Dec 5 14:22:23 oglaroon kernel: [ 1286.466817] ------------[ cut here ]------------ Dec 5 14:22:23 oglaroon kernel: [ 1286.522351] kernel BUG at fs/btrfs/inode.c:841! Dec 5 14:22:23 oglaroon kernel: [ 1286.576855] invalid opcode: 0000 [#1] SMP Dec 5 14:22:23 oglaroon kernel: [ 1286.626464] CPU 1 Dec 5 14:22:23 oglaroon kernel: [ 1286.648512] Modules linked in: btrfs mpt2sas scsi_transport_sas raid_class Dec 5 14:22:23 oglaroon kernel: [ 1286.733894] Dec 5 14:22:23 oglaroon kernel: [ 1286.751785] Pid: 27856, comm: fsstress Not tainted 3.1.0+ #9 Supermicro X8SIL/X8SIL Dec 5 14:22:23 oglaroon kernel: [ 1286.844197] RIP: 0010:[] [] cow_file_range+0x383/0x3a0 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1286.953334] RSP: 0018:ffff880234fe59c8 EFLAGS: 00010286 Dec 5 14:22:23 oglaroon kernel: [ 1287.017092] RAX: 00000000ffffffe4 RBX: ffff8802271270e0 RCX: 0000000000000020 Dec 5 14:22:23 oglaroon kernel: [ 1287.102783] RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff880232a10000 Dec 5 14:22:23 oglaroon kernel: [ 1287.188582] RBP: ffff880234fe5a78 R08: 0000000000000000 R09: 0000000000000002 Dec 5 14:22:23 oglaroon kernel: [ 1287.274383] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000000b8000 Dec 5 14:22:23 oglaroon kernel: [ 1287.360182] R13: 0000000000001000 R14: 00000000000b7fff R15: ffff8802271273e0 Dec 5 14:22:23 oglaroon kernel: [ 1287.445880] FS: 00007f1ca1e62700(0000) GS:ffff88023fc40000(0000) knlGS:0000000000000000 Dec 5 14:22:23 oglaroon kernel: [ 1287.543119] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b Dec 5 14:22:23 oglaroon kernel: [ 1287.612175] CR2: 00007f1ca13515f0 CR3: 0000000233888000 CR4: 00000000000006e0 Dec 5 14:22:23 oglaroon kernel: [ 1287.698079] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Dec 5 14:22:23 oglaroon kernel: [ 1287.783878] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Dec 5 14:22:23 oglaroon kernel: [ 1287.869677] Process fsstress (pid: 27856, threadinfo ffff880234fe4000, task ffff88022f3f3ea0) Dec 5 14:22:23 oglaroon kernel: [ 1287.972118] Stack: Dec 5 14:22:23 oglaroon kernel: [ 1287.996247] ffffffffffffffff ffff880234fe5a28 0000000000000001 0000001000000008 Dec 5 14:22:23 oglaroon kernel: [ 1288.085687] 0000000000000000 ffff880227127118 ffffea0008a039c0 ffff8802345d9708 Dec 5 14:22:23 oglaroon kernel: [ 1288.175023] ffff88022f19a800 0000000000001000 0000000000001000 ffff8802271270d8 Dec 5 14:22:23 oglaroon kernel: [ 1288.264474] Call Trace: Dec 5 14:22:23 oglaroon kernel: [ 1288.293802] [] run_delalloc_range+0x347/0x380 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1288.374434] [] __extent_writepage+0x598/0x720 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1288.454995] [] ? radix_tree_gang_lookup_tag_slot+0x96/0xe0 Dec 5 14:22:23 oglaroon kernel: [ 1288.540793] [] ? find_get_pages_tag+0x11b/0x1b0 Dec 5 14:22:23 oglaroon kernel: [ 1288.615056] [] T.1043+0x2fa/0x3a0 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1288.683073] [] extent_writepages+0x3f/0x60 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1288.760552] [] ? acls_after_inode_item+0xd0/0xd0 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1288.844193] [] ? _atomic_dec_and_lock+0x4d/0x70 Dec 5 14:22:23 oglaroon kernel: [ 1288.918526] [] btrfs_writepages+0x22/0x30 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1288.995116] [] do_writepages+0x1f/0x40 Dec 5 14:22:23 oglaroon kernel: [ 1289.060076] [] __filemap_fdatawrite_range+0x80/0x90 Dec 5 14:22:23 oglaroon kernel: [ 1289.138481] [] filemap_flush+0x17/0x20 Dec 5 14:22:23 oglaroon kernel: [ 1289.203384] [] btrfs_start_delalloc_inodes+0xd2/0x230 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1289.292296] [] ? __sync_filesystem+0x80/0x80 Dec 5 14:22:23 oglaroon kernel: [ 1289.363540] [] btrfs_sync_fs+0x30/0xc0 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1289.436882] [] __sync_filesystem+0x59/0x80 Dec 5 14:22:23 oglaroon kernel: [ 1289.506017] [] sync_one_sb+0x17/0x20 Dec 5 14:22:23 oglaroon kernel: [ 1289.568816] [] iterate_supers+0x7e/0xe0 Dec 5 14:22:23 oglaroon kernel: [ 1289.634781] [] sys_sync+0x40/0x60 Dec 5 14:22:23 oglaroon kernel: [ 1289.694363] [] system_call_fastpath+0x16/0x1b Dec 5 14:22:23 oglaroon kernel: [ 1289.766536] Code: 41 5d 41 5e 41 5f c9 c3 48 8b 7d 88 4c 89 fe 4c 89 95 70 ff ff ff e8 ed 4b 00 00 4c 8b 95 70 ff ff ff e9 4f fd ff ff 0f 0b eb fe <0f> 0b eb fe 0f 0b eb fe 0f 0b eb fe 0f 0b eb fe 0f 0b eb fe 66 Dec 5 14:22:23 oglaroon kernel: [ 1290.001054] RIP [] cow_file_range+0x383/0x3a0 [btrfs] Dec 5 14:22:23 oglaroon kernel: [ 1290.081758] RSP Dec 5 14:22:23 oglaroon kernel: [ 1290.123960] ---[ end trace 96c36b632cca59d5 ]--- Just for reference, the code goes like this: 772 static noinline int cow_file_range(struct inode *inode, ... 834 while (disk_num_bytes > 0) { 835 unsigned long op; 836 837 cur_alloc_size = disk_num_bytes; 838 ret = btrfs_reserve_extent(trans, root, cur_alloc_size, 839 root->sectorsize, 0, alloc_hint, 840 (u64)-1, &ins, 1); 841 BUG_ON(ret); -Jan