On Sat, Jun 06, 2015 at 11:28:43PM +0200, Gabri Mate wrote: > Dear List, > > I have a 12 disk RAID10 btrfs array running on 3.18.14. The FS is 50% and has > about 100 snapshots. The metadata size is about 450 GB. I was doing a > metadata balance when the system crashed. After that when I try to mount the > FS normally it crashes the host with the following error: > > [ 601.168088] INFO: task btrfs-transacti:4506 blocked for more than 120 > seconds. > [ 601.168154] Not tainted 3.18.14 #1 > [ 601.168181] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 601.168232] btrfs-transacti D ffff880271ee2e40 0 4506 2 > 0x00000000 > [ 601.168240] ffff8802777873b0 0000000000000046 ffff880474728568 > ffff880271ee29e0 > [ 601.168244] 0000000000012d80 ffff880273ea3fd8 0000000000012d80 > ffff880271ee29e0 > [ 601.168249] 0000000000000246 ffff8801bf70df00 ffff8800790731f0 > ffff8800790731f0 > [ 601.168253] Call Trace: > [ 601.168303] [<ffffffffa02c5661>] ? wait_current_trans.isra.32+0xa1/0x100 > [btrfs] > [ 601.168314] [<ffffffff810a7150>] ? finish_wait+0xa0/0xa0 > [ 601.168333] [<ffffffffa02c6e38>] ? start_transaction+0x298/0x590 [btrfs] > [ 601.168339] [<ffffffff810c9f10>] ? call_timer_fn+0x100/0x100 > [ 601.168356] [<ffffffffa02c3e3d>] ? transaction_kthread+0x7d/0x250 [btrfs] > [ 601.168371] [<ffffffffa02c3dc0>] ? open_ctree+0x2220/0x2220 [btrfs] > [ 601.168377] [<ffffffff81089ec1>] ? kthread+0xc1/0xe0 > [ 601.168382] [<ffffffff81089e00>] ? kthread_create_on_node+0x1c0/0x1c0 > [ 601.168389] [<ffffffff8154c618>] ? ret_from_fork+0x58/0x90 > [ 601.168393] [<ffffffff81089e00>] ? kthread_create_on_node+0x1c0/0x1c0 > > Mounting it as read only works fine. I have tried skip_balance without any > success. I have also tried multiple kernel versions from 3.16 to 4.0 but I > got similar results to the above. Do you have any suggestions I could try to > get this FS mounted as read-write? >
Can you 'echo w > /proc/sysrq-trigger' to show where the transaction is stuck? Thanks, -liubo -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
