Running fsx-linux on x86_64. reiserfs blocksize = 1 KB, data=journal. .config and full kernel log attached. kernel BUG at fs/reiserfs/journal.c:530! invalid opcode: 0000 [1] SMP CPU 3 Modules linked in: reiserfs parport_pc lp parport tg3 lpfc cciss ehci_hcd ohci_hcd uhci_hcd [last unloaded: reiserfs] Pid: 19141, comm: pdflush Not tainted 2.6.27-rc5 #1 RIP: 0010:[] [] reiserfs_in_journal+0xed/0x155 [reiserfs] RSP: 0018:ffff88006ac6b6f0 EFLAGS: 00010246 RAX: 00000000000023fe RBX: ffff88006ac6b744 RCX: 00000000000023fe RDX: ffffc20011c881d8 RSI: ffffc20011bf21f0 RDI: ffff88027d830800 RBP: ffff88006ac6b700 R08: 0000000000000005 R09: ffff88017b50a400 R10: ffffc20011bf2000 R11: 0000000000000008 R12: ffff88006ac6b814 R13: ffff88019f05bbd0 R14: ffff88017b50a400 R15: 0000000000000001 FS: 00007f742f1fd6f0(0000) GS:ffff88027f618c80(0000) knlGS:00000000f7fde6c0 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 00007f74228fa000 CR3: 000000016f983000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process pdflush (pid: 19141, threadinfo ffff88006ac6a000, task ffff88027dc24560) Stack: ffff88017b50a400 00000000000003fe ffff88006ac6b770 ffffffffa00963c5 000000016ac6b740 0000200000000001 ffff8801f849e080 ffffc20000c74004 000003fdf849e080 ffff880170c44080 000000006ac6b750 ffff88006ac6b940 Call Trace: [] scan_bitmap_block+0xd5/0x227 [reiserfs] [] reiserfs_allocate_blocknrs+0x87e/0xa94 [reiserfs] [] ? search_for_position_by_key+0x165/0x2c7 [reiserfs] [] reiserfs_get_block+0x3b8/0xf67 [reiserfs] [] ? mutex_unlock+0x9/0xb [] reiserfs_writepage+0x724/0xad6 [reiserfs] [] ? find_get_pages_tag+0x41/0xe0 [] __writepage+0x12/0x2b [] write_cache_pages+0x1c4/0x328 [] ? __writepage+0x0/0x2b [] generic_writepages+0x1f/0x25 [] do_writepages+0x2f/0x37 [] __writeback_single_inode+0x145/0x284 [] ? reiserfs_flush_old_commits+0x1e/0xca [reiserfs] [] ? journal_end_sync+0x75/0x7d [reiserfs] [] generic_sync_sb_inodes+0x1c3/0x29e [] sync_sb_inodes+0x9/0xb [] writeback_inodes+0x75/0xbe [] wb_kupdate+0x9f/0x112 [] ? pdflush+0x0/0x1e5 [] ? pdflush+0x0/0x1e5 [] pdflush+0x139/0x1e5 [] ? wb_kupdate+0x0/0x112 [] kthread+0x49/0x76 [] child_rip+0xa/0x11 [] ? kthread+0x0/0x76 [] ? child_rip+0x0/0x11 Code: d0 25 ff 1f 00 00 49 8b 94 c2 f8 01 00 00 eb 12 8b 42 10 48 39 c8 75 06 4c 39 4a 08 74 0d 48 8b 52 40 48 85 d2 75 e9 31 c0 eb 63 <0f> 0b eb fe 49 8b 41 18 48 c1 e0 03 48 0f af c8 48 63 c2 48 01 RIP [] reiserfs_in_journal+0xed/0x155 [reiserfs] RSP Kernel panic - not syncing: Fatal exception