sync and umount hangs

aryan-gupta · 2019-06-06 15:24:41

I am currently trying to flash the ARM version of Arch linux onto a flashdrive using this tutorial: https://archlinuxarm.org/platforms/armv … /odroid-n2
I am able to format the USB drive, and mount it and extract the image into the mounted directory (using bsdtar). However when I try to unmount the drive or run sync. I get this error in dmesg

[ 1228.804820] INFO: task sync:3947 blocked for more than 122 seconds.
[ 1228.804825]       Not tainted 5.1.7-arch1-1-ARCH #1
[ 1228.804826] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1228.804830] sync            D    0  3947   3637 0x00000080
[ 1228.804836] Call Trace:
[ 1228.804855]  ? __schedule+0x30b/0x8b0
[ 1228.804862]  ? wb_queue_work+0x90/0x100
[ 1228.804868]  ? preempt_count_add+0x79/0xb0
[ 1228.804875]  ? default_file_splice_write+0x20/0x20
[ 1228.804880]  schedule+0x32/0x80
[ 1228.804886]  wb_wait_for_completion+0x59/0x90
[ 1228.804894]  ? wait_woken+0x80/0x80
[ 1228.804899]  sync_inodes_sb+0xd8/0x290
[ 1228.804908]  ? default_file_splice_write+0x20/0x20
[ 1228.804914]  iterate_supers+0x95/0xe0
[ 1228.804921]  ksys_sync+0x40/0xb0
[ 1228.804927]  __ia32_sys_sync+0xa/0x10
[ 1228.804934]  do_syscall_64+0x5b/0x180
[ 1228.804941]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 1228.804947] RIP: 0033:0x7f722fa23b8b
[ 1228.804960] Code: Bad RIP value.
[ 1228.804963] RSP: 002b:00007fffbc55c0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
[ 1228.804968] RAX: ffffffffffffffda RBX: 00007fffbc55c218 RCX: 00007f722fa23b8b
[ 1228.804970] RDX: 00007f722faf2e01 RSI: 0000000000000000 RDI: 00007f722fab7b90
[ 1228.804971] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[ 1228.804973] R10: 000055c36d2e5010 R11: 0000000000000246 R12: 0000000000000000
[ 1228.804975] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 1351.684331] INFO: task sync:3947 blocked for more than 245 seconds.
[ 1351.684338]       Not tainted 5.1.7-arch1-1-ARCH #1
[ 1351.684340] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1351.684343] sync            D    0  3947   3637 0x00000080
[ 1351.684351] Call Trace:
[ 1351.684373]  ? __schedule+0x30b/0x8b0
[ 1351.684380]  ? wb_queue_work+0x90/0x100
[ 1351.684387]  ? preempt_count_add+0x79/0xb0
[ 1351.684395]  ? default_file_splice_write+0x20/0x20
[ 1351.684401]  schedule+0x32/0x80
[ 1351.684407]  wb_wait_for_completion+0x59/0x90
[ 1351.684416]  ? wait_woken+0x80/0x80
[ 1351.684422]  sync_inodes_sb+0xd8/0x290
[ 1351.684432]  ? default_file_splice_write+0x20/0x20
[ 1351.684440]  iterate_supers+0x95/0xe0
[ 1351.684447]  ksys_sync+0x40/0xb0
[ 1351.684455]  __ia32_sys_sync+0xa/0x10
[ 1351.684463]  do_syscall_64+0x5b/0x180
[ 1351.684470]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 1351.684477] RIP: 0033:0x7f722fa23b8b
[ 1351.684491] Code: Bad RIP value.
[ 1351.684494] RSP: 002b:00007fffbc55c0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
[ 1351.684499] RAX: ffffffffffffffda RBX: 00007fffbc55c218 RCX: 00007f722fa23b8b
[ 1351.684502] RDX: 00007f722faf2e01 RSI: 0000000000000000 RDI: 00007f722fab7b90
[ 1351.684504] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[ 1351.684506] R10: 000055c36d2e5010 R11: 0000000000000246 R12: 0000000000000000
[ 1351.684508] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

This error repeats about 4 or 5 times then after 5 to 10 min it finally finishes and I can unmount the drive. Do you know why this happens? If I try to exit the terminal or kill the sync/umount command, it corrupts my flashdrive.
The flashdrive is formatted ext4
uname -a: Linux boson 5.1.7-arch1-1-ARCH #1 SMP PREEMPT Tue Jun 4 15:47:45 UTC 2019 x86_64 GNU/Linux
Any help would be appreciated. Thank you

seth · 2019-06-06 15:38:11

The drive is still writing. Probably not gonna happen if you extract the image, leave it alone for 15 minutes and then try to umount it?

Arch Linux

#1 2019-06-06 15:24:41

sync and umount hangs

#2 2019-06-06 15:38:11

Re: sync and umount hangs

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