https://bugzilla.kernel.org/show_bug.cgi?id=71791 --- Comment #3 from edpeur@xxxxxxxxx --- Yes, the journal mode was 'data=ordered'. This problem is reproduced on this external USB drive on my laptop using a quite light workload. It is not always reproducible and I had to change the way I work so I might not be able to reproduce this bug in the near time. There was another hang when shutdown tried to umount this drive: [374641.816086] INFO: task shutdown:20015 blocked for more than 120 seconds. [374641.816096] Tainted: G W 3.12-1-rt-amd64 #1 [374641.816099] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [374641.816103] shutdown D ffff8800b4ce6af0 0 20015 1 0x00000000 [374641.816116] ffff8800b4ce6780 0000000000000086 ffff880103177fd8 ffff880103177fd8 [374641.816119] ffff880103177fd8 ffff880103177fd8 ffff8800b4ce6780 ffff8800b4ce6780 [374641.816122] 0000000000000002 ffffffff81123410 ffff880103177d90 000000000000c394 [374641.816129] Call Trace: [374641.816142] [<ffffffff81123410>] ? wait_on_page_read+0x60/0x60 [374641.816147] [<ffffffff814aecb1>] ? schedule+0x21/0x90 [374641.816151] [<ffffffff814aeda3>] ? io_schedule+0x83/0xd0 [374641.816154] [<ffffffff81123415>] ? sleep_on_page+0x5/0x10 [374641.816158] [<ffffffff814ad594>] ? __wait_on_bit+0x54/0x80 [374641.816162] [<ffffffff8112322f>] ? wait_on_page_bit+0x7f/0x90 [374641.816166] [<ffffffff81082050>] ? wake_atomic_t_function+0x30/0x30 [374641.816171] [<ffffffff811307b8>] ? pagevec_lookup_tag+0x18/0x20 [374641.816175] [<ffffffff81123318>] ? filemap_fdatawait_range+0xd8/0x150 [374641.816179] [<ffffffff8108e6b9>] ? get_parent_ip+0x9/0x20 [374641.816182] [<ffffffff8108e6b9>] ? get_parent_ip+0x9/0x20 [374641.816186] [<ffffffff814b42d7>] ? add_preempt_count+0x97/0xe0 [374641.816191] [<ffffffff8105ed50>] ? pin_current_cpu+0x90/0x1b0 [374641.817981] [<ffffffff8108e6b9>] ? get_parent_ip+0x9/0x20 [374641.817983] [<ffffffff8105ee7d>] ? unpin_current_cpu+0xd/0x60 [374641.817986] [<ffffffff811ac869>] ? sync_inodes_sb+0x169/0x1f0 [374641.817989] [<ffffffff811b1c80>] ? generic_write_sync+0x60/0x60 [374641.817991] [<ffffffff811877ba>] ? iterate_supers+0xba/0x120 [374641.817993] [<ffffffff811b1ecd>] ? sys_sync+0x2d/0x90 [374641.817996] [<ffffffff814b7ab9>] ? system_call_fastpath+0x16/0x1b I have upgraded to: http://ftp.debian.org/debian/pool/main/l/linux/linux-image-3.13-1-amd64_3.13.5-1_amd64.deb I have enabled 'data=writeback' now. So, I will report if I see this problem again. -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
