On Thu, Aug 8, 2013 at 3:12 AM, Colin Cross <ccross@xxxxxxxxxxx> wrote:
> On Wed, Aug 7, 2013 at 6:01 PM, Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote:
>> On Thu, Aug 8, 2013 at 1:34 AM, Colin Cross <ccross@xxxxxxxxxxx> wrote:
>>> On Wed, Aug 7, 2013 at 4:15 PM, Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote:
>>>> On Thu, Aug 8, 2013 at 12:58 AM, Colin Cross <ccross@xxxxxxxxxxx> wrote:
>>>>> Can you try add a call to show_state_filter(TASK_UNINTERRUPTIBLE) in
>>>>> the error path of try_to_freeze_tasks(), where it prints the "refusing
>>>>> to freeze" message? It will print the stack trace of every thread
>>>>> since they are all in the freezer, so the output will be very long.
>>>>>
>>>>
>>>> If you provide a patch, I will give it a try.
>>>
>>> Try the attached patch.
>>
>> This time I do not see ext4 related messages.
>>
>> - Sedat -
>
> Can you describe your filesystem setup? It looks like you have an
> ntfs fuse filesystem and a loopback ext4 mount? Is the file backing
> the loopback ext4 filesystem located on the ntfs filesystem?
>
[ CC fuse folks ]
This is a Ubuntu/precise AMD64 installed in a WUBI environment (rootfs
is an image on my Win7-partition and thus uses fuse/ntfs/loop).
$ cat /etc/fstab
# /etc/fstab: static file system information.
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
# <file system> <mount point> <type> <options>
<dump> <pass>
proc /proc proc
nodev,noexec,nosuid 0 0
/host/ubuntu/disks/root.disk / ext4
loop,errors=remount-ro 0 1
/host/ubuntu/disks/swap.disk none swap loop,sw
0 0
$ df -T
Dateisystem Typ 1K-Blöcke Benutzt Verfügbar Verw% Eingehängt auf
rootfs rootfs 17753424 11598008 5230540 69% / <---
18GiB file-image
udev devtmpfs 1969240 4 1969236 1% /dev
tmpfs tmpfs 789036 884 788152 1% /run
/dev/sda2 fuseblk 465546236 107358584 358187652 24% /host <--- Win7-OS
/dev/loop0 ext4 17753424 11598008 5230540 69% /
none tmpfs 5120 0 5120 0% /run/lock
none tmpfs 1972588 200 1972388 1% /run/shm
$ sudo LC_ALL=C fdisk -l /dev/sda
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xcb9885ab
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT
/dev/sda2 206848 931299327 465546240 7 HPFS/NTFS/exFAT
/dev/sda3 931299328 976773119 22736896 27 Hidden NTFS WinRE
[ /etc/grub.d/40_custom ]
...
menuentry "Ubuntu/precise AMD64, WUBI-system with Ubuntu-kernel"
--class ubuntu --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 001AADA61AAD9964
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /vmlinuz root=UUID=001AADA61AAD9964
loop=/ubuntu/disks/root.disk ro
initrd /initrd.img
}
...
So, no "native" Linux installation here.
- Sedat -
[1] https://wiki.ubuntu.com/WubiGuide
> This looks like the interesting part, the process backing the fuse
> filesystem is frozen (through the normal freeze path, not any of my
> new freeze points), and the loop0 processes are blocked on it. It
> doesn't seem related to my patches.
>
> [ 125.336205] mount.ntfs D ffffffff81811820 0 303 1 0x00000004
> [ 125.336209] ffff8800d3e95d18 0000000000000002 0000000037a6b000
> ffff8800d57a66b8
> [ 125.336212] ffff8801185286c0 ffff8800d3e95fd8 ffff8800d3e95fd8
> ffff8800d3e95fd8
> [ 125.336214] ffffffff81c144a0 ffff8801185286c0 ffff8800d3e95d08
> ffff8801185286c0
> [ 125.336217] Call Trace:
> [ 125.336225] [<ffffffff816e81b9>] schedule+0x29/0x70
> [ 125.336230] [<ffffffff810ba663>] __refrigerator+0x43/0xe0
> [ 125.336234] [<ffffffff81078e19>] get_signal_to_deliver+0x5b9/0x600
> [ 125.336238] [<ffffffff812c4b98>] ? fuse_dev_read+0x68/0x80
> [ 125.336242] [<ffffffff810133b8>] do_signal+0x58/0x8f0
> [ 125.336246] [<ffffffff8110906c>] ? acct_account_cputime+0x1c/0x20
> [ 125.336249] [<ffffffff8137a90d>] ? do_raw_spin_unlock+0x5d/0xb0
> [ 125.336252] [<ffffffff816e968e>] ? _raw_spin_unlock+0xe/0x10
> [ 125.336255] [<ffffffff8109d00d>] ? vtime_account_user+0x6d/0x80
> [ 125.336258] [<ffffffff81013cd8>] do_notify_resume+0x88/0xc0
> [ 125.336261] [<ffffffff816f26da>] int_signal+0x12/0x17
> [ 125.336263] loop0 D ffffffff81811820 0 310 2 0x00000000
> [ 125.336265] ffff8800d573d968 0000000000000002 0000000000000000
> ffff8800d57aeb80
> [ 125.336268] ffff880118bda740 ffff8800d573dfd8 ffff8800d573dfd8
> ffff8800d573dfd8
> [ 125.336270] ffff880119f98340 ffff880118bda740 ffff8800d573d968
> ffff88011fad5118
> [ 125.336273] Call Trace:
> [ 125.336278] [<ffffffff811443a0>] ? __lock_page+0x70/0x70
> [ 125.336280] [<ffffffff816e81b9>] schedule+0x29/0x70
> [ 125.336283] [<ffffffff816e828f>] io_schedule+0x8f/0xd0
> [ 125.336286] [<ffffffff811443ae>] sleep_on_page+0xe/0x20
> [ 125.336288] [<ffffffff816e49ed>] __wait_on_bit_lock+0x5d/0xc0
> [ 125.336291] [<ffffffff81144397>] __lock_page+0x67/0x70
> [ 125.336294] [<ffffffff8108a0e0>] ? wake_atomic_t_function+0x40/0x40
> [ 125.336298] [<ffffffff811da79f>] __generic_file_splice_read+0x59f/0x5d0
> [ 125.336302] [<ffffffff813656d8>] ? cpumask_next_and+0x38/0x50
> [ 125.336305] [<ffffffff810a3b33>] ? update_sd_lb_stats+0x123/0x610
> [ 125.336309] [<ffffffff81048143>] ? x2apic_send_IPI_mask+0x13/0x20
> [ 125.336312] [<ffffffff8104029b>] ? native_smp_send_reschedule+0x4b/0x60
> [ 125.336315] [<ffffffff810964b6>] ? resched_task+0x76/0x80
> [ 125.336318] [<ffffffff811d8c80>] ? page_cache_pipe_buf_release+0x30/0x30
> [ 125.336321] [<ffffffff811da80e>] generic_file_splice_read+0x3e/0x80
> [ 125.336324] [<ffffffff811d8f6b>] do_splice_to+0x7b/0xa0
> [ 125.336326] [<ffffffff811d91f7>] splice_direct_to_actor+0xa7/0x1c0
> [ 125.336330] [<ffffffff81495780>] ? loop_thread+0x2a0/0x2a0
> [ 125.336333] [<ffffffff81495292>] do_bio_filebacked+0xf2/0x340
> [ 125.336336] [<ffffffff8137a79c>] ? do_raw_spin_lock+0x4c/0x120
> [ 125.336339] [<ffffffff814955c5>] loop_thread+0xe5/0x2a0
> [ 125.336341] [<ffffffff8108a060>] ? __init_waitqueue_head+0x40/0x40
> [ 125.336344] [<ffffffff814954e0>] ? do_bio_filebacked+0x340/0x340
> [ 125.336346] [<ffffffff81089848>] kthread+0xd8/0xe0
> [ 125.336348] [<ffffffff81089770>] ? flush_kthread_worker+0xe0/0xe0
> [ 125.336351] [<ffffffff816f236c>] ret_from_fork+0x7c/0xb0
> [ 125.336353] [<ffffffff81089770>] ? flush_kthread_worker+0xe0/0xe0
> [ 125.336354] jbd2/loop0-8 D 0000000000000000 0 312 2 0x00000000
> [ 125.336357] ffff8800d56c7b08 0000000000000002 ffff8800d56c7ab8
> ffffffff8137a90d
> [ 125.336359] ffff880037ba4240 ffff8800d56c7fd8 ffff8800d56c7fd8
> ffff8800d56c7fd8
> [ 125.336362] ffff88010d33e5c0 ffff880037ba4240 ffff8800d56c7b08
> ffff88011fad5118
> [ 125.336364] Call Trace:
> [ 125.336367] [<ffffffff8137a90d>] ? do_raw_spin_unlock+0x5d/0xb0
> [ 125.336369] [<ffffffff811ddcb0>] ? __wait_on_buffer+0x30/0x30
> [ 125.336371] [<ffffffff816e81b9>] schedule+0x29/0x70
> [ 125.336374] [<ffffffff816e828f>] io_schedule+0x8f/0xd0
> [ 125.336376] [<ffffffff811ddcbe>] sleep_on_buffer+0xe/0x20
> [ 125.336378] [<ffffffff816e4c22>] __wait_on_bit+0x62/0x90
> [ 125.336380] [<ffffffff811ddcb0>] ? __wait_on_buffer+0x30/0x30
> [ 125.336382] [<ffffffff816e4ccc>] out_of_line_wait_on_bit+0x7c/0x90
> [ 125.336384] [<ffffffff8108a0e0>] ? wake_atomic_t_function+0x40/0x40
> [ 125.336386] [<ffffffff811ddcae>] __wait_on_buffer+0x2e/0x30
> [ 125.336390] [<ffffffff812a02c1>]
> jbd2_journal_commit_transaction+0x1051/0x1c60
> [ 125.336393] [<ffffffff810a460b>] ? load_balance+0x14b/0x870
> [ 125.336397] [<ffffffff816e97e4>] ? _raw_spin_lock_irqsave+0x24/0x30
> [ 125.336399] [<ffffffff8107328f>] ? try_to_del_timer_sync+0x4f/0x70
> [ 125.336402] [<ffffffff812a5a7b>] kjournald2+0x11b/0x350
> [ 125.336405] [<ffffffff816e72e5>] ? __schedule+0x3e5/0x850
> [ 125.336407] [<ffffffff8108a060>] ? __init_waitqueue_head+0x40/0x40
> [ 125.336410] [<ffffffff812a5960>] ? jbd2_journal_clear_features+0x90/0x90
> [ 125.336412] [<ffffffff81089848>] kthread+0xd8/0xe0
> [ 125.336414] [<ffffffff81089770>] ? flush_kthread_worker+0xe0/0xe0
> [ 125.336416] [<ffffffff816f236c>] ret_from_fork+0x7c/0xb0
> [ 125.336418] [<ffffffff81089770>] ? flush_kthread_worker+0xe0/0xe0
