suspend to disk hangs when running from ubifs

saeed bishara saeed.bishara at gmail.com
Mon Apr 12 04:31:47 EDT 2010 

Thanks Artem, your suggestion fixed my issue.
saeed

On Wed, Mar 31, 2010 at 4:51 PM, Artem Bityutskiy <dedekind1 at gmail.com> wrote:
> On Wed, 2010-03-31 at 16:38 +0300, Artem Bityutskiy wrote:
>> On Tue, 2010-02-23 at 12:17 +0200, saeed bishara wrote:
>> > Hi,
>> > I've installed my rootfs on nand flash with ubifs, when trying to
>> > syspend to disk (swap on sata HDD), the system hangs after saving the
>> > image, after two minutes I got the message below, if I manually reset
>> > the system, it succeeds to resume.
>> > please note that the page offset is 0x80000000.
>>
>> I guess it is related to the fact that the "ubi_bgt0d" thread is frozen,
>> and then the reboot notifier is called and this notifier tries to stop
>> the frozen thread.
>>
>> Try to comment out thread stopping in the reboot notifier. It is not
>> needed anyway.
>>
>> But I think I will remove this UBI reboot notifier, because it does not
>> solve any problem, and it seems it actually introduces new problems. See
>> this post:
>>
>> http://lkml.org/lkml/2010/2/12/114
>>
>> Thus, if you confirm that commenting out the stuff in the notifier
>> helps, I'll remove it.
>>
>> CCing Kevin, the original author of the notifier patch.
>
> Now I am actually CCing him.
>
>>
>> >
>> > INFO: task echo:612 blocked for more than 120 seconds.
>> > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>> > echo          D 8045baa8     0   612    609 0x00020000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8045bcc4>]
>> > (schedule_timeout+0x1c/0x21c)
>> > [<8045bcc4>] (schedule_timeout+0x1c/0x21c) from [<8045b6b0>]
>> > (wait_for_common+0xcc/0x15c)
>> > [<8045b6b0>] (wait_for_common+0xcc/0x15c) from [<800897e4>]
>> > (kthread_stop+0x7c/0xec)
>> > [<800897e4>] (kthread_stop+0x7c/0xec) from [<802d5d88>]
>> > (ubi_reboot_notifier+0x20/0x34)
>> > [<802d5d88>] (ubi_reboot_notifier+0x20/0x34) from [<8008de04>]
>> > (notifier_call_chain+0x2c/0x74)
>> > [<8008de04>] (notifier_call_chain+0x2c/0x74) from [<8008e10c>]
>> > (__blocking_notifier_call_chain+0x4c/0x68)
>> > [<8008e10c>] (__blocking_notifier_call_chain+0x4c/0x68) from
>> > [<8008e140>] (blocking_notifier_call_chain+0x18/0x24)
>> > [<8008e140>] (blocking_notifier_call_chain+0x18/0x24) from
>> > [<80083084>] (kernel_shutdown_prepare+0x20/0x38)
>> > [<80083084>] (kernel_shutdown_prepare+0x20/0x38) from [<800830ac>]
>> > (kernel_power_off+0x10/0x44)
>> > [<800830ac>] (kernel_power_off+0x10/0x44) from [<800a0bac>]
>> > (hibernate+0x128/0x1a4)
>> > [<800a0bac>] (hibernate+0x128/0x1a4) from [<8009f54c>] (state_store+0x50/0xc4)
>> > [<8009f54c>] (state_store+0x50/0xc4) from [<8021d244>]
>> > (kobj_attr_store+0x1c/0x28)
>> > [<8021d244>] (kobj_attr_store+0x1c/0x28) from [<801265a0>]
>> > (sysfs_write_file+0x104/0x13c)
>> > [<801265a0>] (sysfs_write_file+0x104/0x13c) from [<800e4e0c>]
>> > (vfs_write+0xb0/0x160)
>> > [<800e4e0c>] (vfs_write+0xb0/0x160) from [<800e5314>] (sys_write+0x3c/0x6c)
>> > [<800e5314>] (sys_write+0x3c/0x6c) from [<80035e40>] (ret_fast_syscall+0x0/0x2c)
>> >
>> > here are the states of all the tasks:
>> > SysRq : Show Blocked State
>> >   task                PC stack   pid father
>> > init          D 8045baa8     0     1      0 0x00020000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<80038750>]
>> > (do_notify_resume+0x48/0x614)
>> > [<80038750>] (do_notify_resume+0x48/0x614) from [<80035e8c>]
>> > (work_pending+0x1c/0x20)
>> > bdi-default   D 8045baa8     0   214      2 0x00000000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<800cfa64>]
>> > (bdi_forker_task+0x198/0x294)
>> > [<800cfa64>] (bdi_forker_task+0x198/0x294) from [<80089a78>] (kthread+0x78/0x80)
>> > [<80089a78>] (kthread+0x78/0x80) from [<80036e0c>] (kernel_thread_exit+0x0/0x8)
>> > ksuspend_usbd D 8045baa8     0   229      2 0x00000000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<800869bc>]
>> > (worker_thread+0xcc/0x200)
>> > [<800869bc>] (worker_thread+0xcc/0x200) from [<80089a78>] (kthread+0x78/0x80)
>> > [<80089a78>] (kthread+0x78/0x80) from [<80036e0c>] (kernel_thread_exit+0x0/0x8)
>> > khubd         D 8045baa8     0   234      2 0x00000000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<80319a10>] (hub_thread+0xcc4/0xd5c)
>> > [<80319a10>] (hub_thread+0xcc4/0xd5c) from [<80089a78>] (kthread+0x78/0x80)
>> > [<80089a78>] (kthread+0x78/0x80) from [<80036e0c>] (kernel_thread_exit+0x0/0x8)
>> > kswapd0       D 8045baa8     0   274      2 0x00000000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<800c7a74>] (kswapd+0x120/0x4c4)
>> > [<800c7a74>] (kswapd+0x120/0x4c4) from [<80089a78>] (kthread+0x78/0x80)
>> > [<80089a78>] (kthread+0x78/0x80) from [<80036e0c>] (kernel_thread_exit+0x0/0x8)
>> > ubi_bgt0d     D 8045baa8     0   484      2 0x00000000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<802dc64c>] (ubi_thread+0x68/0x138)
>> > [<802dc64c>] (ubi_thread+0x68/0x138) from [<80089a78>] (kthread+0x78/0x80)
>> > [<80089a78>] (kthread+0x78/0x80) from [<80036e0c>] (kernel_thread_exit+0x0/0x8)
>> > usbhid_resume D 8045baa8     0   569      2 0x00000000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<800869bc>]
>> > (worker_thread+0xcc/0x200)
>> > [<800869bc>] (worker_thread+0xcc/0x200) from [<80089a78>] (kthread+0x78/0x80)
>> > [<80089a78>] (kthread+0x78/0x80) from [<80036e0c>] (kernel_thread_exit+0x0/0x8)
>> > ubifs_bgt0_0  D 8045baa8     0   601      2 0x00000000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<801d3118>]
>> > (ubifs_bg_thread+0x58/0x108)
>> > [<801d3118>] (ubifs_bg_thread+0x58/0x108) from [<80089a78>] (kthread+0x78/0x80)
>> > [<80089a78>] (kthread+0x78/0x80) from [<80036e0c>] (kernel_thread_exit+0x0/0x8)
>> > sh            D 8045baa8     0   609      1 0x00020000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<80038750>]
>> > (do_notify_resume+0x48/0x614)
>> > [<80038750>] (do_notify_resume+0x48/0x614) from [<80035e8c>]
>> > (work_pending+0x1c/0x20)
>> > flush-ubifs_0 D 8045baa8     0   610      2 0x00000000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8008ffc0>] (refrigerator+0x9c/0xc8)
>> > [<8008ffc0>] (refrigerator+0x9c/0xc8) from [<800ff454>]
>> > (bdi_writeback_task+0x94/0xbc)
>> > [<800ff454>] (bdi_writeback_task+0x94/0xbc) from [<800cf6c0>]
>> > (bdi_start_fn+0x64/0xb8)
>> > [<800cf6c0>] (bdi_start_fn+0x64/0xb8) from [<80089a78>] (kthread+0x78/0x80)
>> > [<80089a78>] (kthread+0x78/0x80) from [<80036e0c>] (kernel_thread_exit+0x0/0x8)
>> > echo          D 8045baa8     0   612    609 0x00020000
>> > [<8045baa8>] (schedule+0x2e0/0x328) from [<8045bcc4>]
>> > (schedule_timeout+0x1c/0x21c)
>> > [<8045bcc4>] (schedule_timeout+0x1c/0x21c) from [<8045b6b0>]
>> > (wait_for_common+0xcc/0x15c)
>> > [<8045b6b0>] (wait_for_common+0xcc/0x15c) from [<800897e4>]
>> > (kthread_stop+0x7c/0xec)
>> > [<800897e4>] (kthread_stop+0x7c/0xec) from [<802d5d88>]
>> > (ubi_reboot_notifier+0x20/0x34)
>> > [<802d5d88>] (ubi_reboot_notifier+0x20/0x34) from [<8008de04>]
>> > (notifier_call_chain+0x2c/0x74)
>> > [<8008de04>] (notifier_call_chain+0x2c/0x74) from [<8008e10c>]
>> > (__blocking_notifier_call_chain+0x4c/0x68)
>> > [<8008e10c>] (__blocking_notifier_call_chain+0x4c/0x68) from
>> > [<8008e140>] (blocking_notifier_call_chain+0x18/0x24)
>> > [<8008e140>] (blocking_notifier_call_chain+0x18/0x24) from
>> > [<80083084>] (kernel_shutdown_prepare+0x20/0x38)
>> > [<80083084>] (kernel_shutdown_prepare+0x20/0x38) from [<800830ac>]
>> > (kernel_power_off+0x10/0x44)
>> > [<800830ac>] (kernel_power_off+0x10/0x44) from [<800a0bac>]
>> > (hibernate+0x128/0x1a4)
>> > [<800a0bac>] (hibernate+0x128/0x1a4) from [<8009f54c>] (state_store+0x50/0xc4)
>> > [<8009f54c>] (state_store+0x50/0xc4) from [<8021d244>]
>> > (kobj_attr_store+0x1c/0x28)
>> > [<8021d244>] (kobj_attr_store+0x1c/0x28) from [<801265a0>]
>> > (sysfs_write_file+0x104/0x13c)
>> > [<801265a0>] (sysfs_write_file+0x104/0x13c) from [<800e4e0c>]
>> > (vfs_write+0xb0/0x160)
>> > [<800e4e0c>] (vfs_write+0xb0/0x160) from [<800e5314>] (sys_write+0x3c/0x6c)
>> > [<800e5314>] (sys_write+0x3c/0x6c) from [<80035e40>] (ret_fast_syscall+0x0/0x2c)
>> >
>> > ______________________________________________________
>> > Linux MTD discussion mailing list
>> > http://lists.infradead.org/mailman/listinfo/linux-mtd/
>>
>
> --
> Best Regards,
> Artem Bityutskiy (Артём Битюцкий)
>
>

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