I had some 10gb files that I was using for random write testing (with cow enabled). I remount the fs with nodatacow, then ran btrfsctl to defragement the file. A BUG message appeared in the messages file. After a reboot btrfsck gave no errors.
Please let me know what extra information you need. Thanks Phil Mar 9 10:12:25 sentryA kernel: [66771.230266] BUG: Bad page state in process btrfsctl pfn:201575 Mar 9 10:12:25 sentryA kernel: [66771.230270] page:ffffea000704b198 flags:0040000000000000 count:-1608652401 mapcount:0 mapping:ffff88002e84b000 index:ffffc90002633d40 Mar 9 10:12:25 sentryA kernel: [66771.230274] Pid: 6734, comm: btrfsctl Not tainted 2.6.33-5-default #1 Mar 9 10:12:25 sentryA kernel: [66771.230276] Call Trace: Mar 9 10:12:25 sentryA kernel: [66771.230283] [<ffffffff810a2ddd>] bad_page+0x106/0x118 Mar 9 10:12:25 sentryA kernel: [66771.230287] [<ffffffff810a4fb2>] get_page_from_freelist+0x49e/0x707 Mar 9 10:12:25 sentryA kernel: [66771.230291] [<ffffffff810a542e>] __alloc_pages_nodemask+0x123/0x64d Mar 9 10:12:25 sentryA kernel: [66771.230307] [<ffffffffa0310c36>] ? extent_readpages+0x16e/0x197 [btrfs] Mar 9 10:12:25 sentryA kernel: [66771.230313] [<ffffffff81085d9a>] ? delayacct_end+0x78/0x83 Mar 9 10:12:25 sentryA kernel: [66771.230316] [<ffffffff810c9210>] alloc_pages_current+0x96/0x9f Mar 9 10:12:25 sentryA kernel: [66771.230320] [<ffffffff8109f60e>] __page_cache_alloc+0x59/0x5d Mar 9 10:12:25 sentryA kernel: [66771.230323] [<ffffffff810a6e3a>] __do_page_cache_readahead+0x96/0x1a2 Mar 9 10:12:25 sentryA kernel: [66771.230327] [<ffffffff810a6f62>] ra_submit+0x1c/0x20 Mar 9 10:12:25 sentryA kernel: [66771.230329] [<ffffffff810a71f2>] ondemand_readahead+0x1b2/0x1c5 Mar 9 10:12:25 sentryA kernel: [66771.230333] [<ffffffff810a72be>] page_cache_sync_readahead+0x17/0x19 Mar 9 10:12:25 sentryA kernel: [66771.230345] [<ffffffffa02f71e1>] btrfs_force_ra+0x1c/0x25 [btrfs] Mar 9 10:12:25 sentryA kernel: [66771.230357] [<ffffffffa031a3a3>] btrfs_ioctl+0x558/0x959 [btrfs] Mar 9 10:12:25 sentryA kernel: [66771.230361] [<ffffffff810e26e4>] vfs_ioctl+0x2a/0x9e Mar 9 10:12:25 sentryA kernel: [66771.230363] [<ffffffff810e2c15>] do_vfs_ioctl+0x442/0x47f Mar 9 10:12:25 sentryA kernel: [66771.230367] [<ffffffff8119e5e7>] ? __up_read+0x9e/0xa7 Mar 9 10:12:25 sentryA kernel: [66771.230370] [<ffffffff810568fb>] ? up_read+0x9/0xb Mar 9 10:12:25 sentryA kernel: [66771.230373] [<ffffffff810e2ca7>] sys_ioctl+0x55/0x77 Mar 9 10:12:29 sentryA kernel: [66771.230377] [<ffffffff810029ab>] system_call_fastpath+0x16/0x1b -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
