Got some more information. I installed Debian on another disk ("rescue")
running 2.6.32, pulled the latest btrfs module code from git, applied an
earlier mentioned patch[1], then compiled and loaded the new module.
It's able to mount the volume initially...Jan 3 14:46:57 rescue kernel: [ 25.984141] Btrfs loaded Jan 3 14:46:57 rescue kernel: [ 25.984711] device fsid 334a5cd99de23fc4-ed77fc1dc6f59780 devid 1 transid 29665 /dev/sdb3 Jan 3 14:46:57 rescue kernel: [ 25.985137] btrfs: use compression But after a little activity (chrooting in and running "apt-get update"), the apt-get freezes and I get many hundreds of thousands of these: Jan 3 14:47:30 rescue kernel: [ 59.275031] parent transid verify failed on 111181824 wanted 29645 found 27038 Eventually, I get this: Jan 3 14:50:31 rescue kernel: [ 240.364274] INFO: task btrfs-transacti:1400 blocked for more than 120 seconds. Jan 3 14:50:31 rescue kernel: [ 240.364337] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jan 3 14:50:31 rescue kernel: [ 240.364399] btrfs-transac D 0000000000000000 0 1400 2 0x00000000 Jan 3 14:50:31 rescue kernel: [ 240.364515] ffff88021f06b880 0000000000000046 0000000000000000 ffffffffa02d4e98 Jan 3 14:50:31 rescue kernel: [ 240.364692] ffffea0007646b10 0000000000000000 000000000000f8a0 ffff88021cb75fd8 Jan 3 14:50:31 rescue kernel: [ 240.364867] 00000000000155c0 00000000000155c0 ffff88021dc37810 ffff88021dc37b08 Jan 3 14:50:31 rescue kernel: [ 240.365042] Call Trace: Jan 3 14:50:31 rescue kernel: [ 240.365097] [<ffffffffa02d4e98>] ? update_block_group+0x1b1/0x1d3 [btrfs] Jan 3 14:50:31 rescue kernel: [ 240.365150] [<ffffffff8106bebd>] ? ktime_get_ts+0x68/0xb2 Jan 3 14:50:31 rescue kernel: [ 240.365201] [<ffffffff810989b2>] ? delayacct_end+0x74/0x7f Jan 3 14:50:31 rescue kernel: [ 240.365251] [<ffffffff810b2c91>] ? sync_page+0x0/0x46 Jan 3 14:50:31 rescue kernel: [ 240.365300] [<ffffffff812e412e>] ? io_schedule+0x73/0xb7 Jan 3 14:50:31 rescue kernel: [ 240.365349] [<ffffffff810b2cd2>] ? sync_page+0x41/0x46 Jan 3 14:50:31 rescue kernel: [ 240.365397] [<ffffffff812e462e>] ? __wait_on_bit+0x41/0x70 Jan 3 14:50:31 rescue kernel: [ 240.365447] [<ffffffff810b2e56>] ? wait_on_page_bit+0x6b/0x71 Jan 3 14:50:31 rescue kernel: [ 240.365496] [<ffffffff81064a9c>] ? wake_bit_function+0x0/0x23 Jan 3 14:50:31 rescue kernel: [ 240.365547] [<ffffffff810ba94e>] ? pagevec_lookup_tag+0x1a/0x21 Jan 3 14:50:31 rescue kernel: [ 240.365596] [<ffffffff810b35f2>] ? wait_on_page_writeback_range+0x69/0x11b Jan 3 14:50:31 rescue kernel: [ 240.365655] [<ffffffffa02f83d9>] ? btrfs_wait_ordered_range+0x6b/0x112 [btrfs] Jan 3 14:50:31 rescue kernel: [ 240.365725] [<ffffffffa02f865e>] ? btrfs_run_ordered_operations+0x12d/0x1b6 [btrfs] Jan 3 14:50:31 rescue kernel: [ 240.365794] [<ffffffffa02e353f>] ? btrfs_commit_transaction+0x29f/0x618 [btrfs] Jan 3 14:50:31 rescue kernel: [ 240.365857] [<ffffffff81064a6e>] ? autoremove_wake_function+0x0/0x2e Jan 3 14:50:31 rescue kernel: [ 240.365913] [<ffffffffa02df2cf>] ? transaction_kthread+0x173/0x204 [btrfs] Jan 3 14:50:31 rescue kernel: [ 240.365970] [<ffffffffa02df15c>] ? transaction_kthread+0x0/0x204 [btrfs] Jan 3 14:50:31 rescue kernel: [ 240.366021] [<ffffffff810647a1>] ? kthread+0x79/0x81 Jan 3 14:50:31 rescue kernel: [ 240.366070] [<ffffffff81011b6a>] ? child_rip+0xa/0x20 Jan 3 14:50:31 rescue kernel: [ 240.366118] [<ffffffff81064728>] ? kthread+0x0/0x81 Jan 3 14:50:31 rescue kernel: [ 240.366166] [<ffffffff81011b60>] ? child_rip+0x0/0x20 Jan 3 14:50:31 rescue kernel: [ 240.366214] INFO: task apt-get:1411 blocked for more than 120 seconds. Jan 3 14:50:31 rescue kernel: [ 240.366264] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jan 3 14:50:31 rescue kernel: [ 240.366326] apt-get D 0000000000000002 0 1411 1407 0x00000004 Jan 3 14:50:31 rescue kernel: [ 240.366433] ffff88021dc32a60 0000000000000082 0000005001c9f000 0000000001c9f000 Jan 3 14:50:31 rescue kernel: [ 240.366608] 0000000000000000 0000000000000000 000000000000f8a0 ffff88021b869fd8 Jan 3 14:50:31 rescue kernel: [ 240.366782] 00000000000155c0 00000000000155c0 ffff88021c3d69f0 ffff88021c3d6ce8 Jan 3 14:50:31 rescue kernel: [ 240.366957] Call Trace: Jan 3 14:50:31 rescue kernel: [ 240.367002] [<ffffffff810b7df3>] ? __pagevec_free+0x69/0x80 Jan 3 14:50:31 rescue kernel: [ 240.367051] [<ffffffff81017131>] ? read_tsc+0xa/0x20 Jan 3 14:50:31 rescue kernel: [ 240.367100] [<ffffffff810b2c91>] ? sync_page+0x0/0x46 Jan 3 14:50:31 rescue kernel: [ 240.367148] [<ffffffff812e412e>] ? io_schedule+0x73/0xb7 Jan 3 14:50:31 rescue kernel: [ 240.367197] [<ffffffff810b2cd2>] ? sync_page+0x41/0x46 Jan 3 14:50:31 rescue kernel: [ 240.367245] [<ffffffff812e462e>] ? __wait_on_bit+0x41/0x70 Jan 3 14:50:31 rescue kernel: [ 240.367294] [<ffffffff810b2e56>] ? wait_on_page_bit+0x6b/0x71 Jan 3 14:50:31 rescue kernel: [ 240.367343] [<ffffffff81064a9c>] ? wake_bit_function+0x0/0x23 Jan 3 14:50:31 rescue kernel: [ 240.367393] [<ffffffff810bb33e>] ? lock_page+0x9/0x1f Jan 3 14:50:31 rescue kernel: [ 240.367441] [<ffffffff810bba88>] ? truncate_inode_pages_range+0x257/0x2b0 Jan 3 14:50:31 rescue kernel: [ 240.367500] [<ffffffffa02e9881>] ? btrfs_delete_inode+0x27/0x132 [btrfs] Jan 3 14:50:31 rescue kernel: [ 240.367557] [<ffffffffa02e985a>] ? btrfs_delete_inode+0x0/0x132 [btrfs] Jan 3 14:50:31 rescue kernel: [ 240.367609] [<ffffffff810fd840>] ? generic_delete_inode+0xdc/0x168 Jan 3 14:50:31 rescue kernel: [ 240.367659] [<ffffffff810fa1ff>] ? d_kill+0x34/0x55 Jan 3 14:50:31 rescue kernel: [ 240.367707] [<ffffffff810fbd76>] ? dput+0x13d/0x149 Jan 3 14:50:31 rescue kernel: [ 240.367755] [<ffffffff810f651c>] ? sys_renameat+0x184/0x1e9 Jan 3 14:50:31 rescue kernel: [ 240.367804] [<ffffffff81064a6e>] ? autoremove_wake_function+0x0/0x2e Jan 3 14:50:31 rescue kernel: [ 240.367854] [<ffffffff8106bebd>] ? ktime_get_ts+0x68/0xb2 Jan 3 14:50:31 rescue kernel: [ 240.367904] [<ffffffff810ec812>] ? vfs_read+0xca/0xff Jan 3 14:50:31 rescue kernel: [ 240.367953] [<ffffffff81010b02>] ? system_call_fastpath+0x16/0x1b Any ideas? I'm happy to apply any patches you suggest and try again... Steve [1]http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg03686.html -- 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
