Reset due to emergency remount r/o

[Arun KS]

Hi Priyaranjan,


On Wed, Feb 19, 2014 at 6:14 PM, Priyaranjan Das
<priyaranjan456789 at gmail.com> wrote:
>
> Hi All,
>
> I am facing an kernel restart due to emergency remount. Could anybody tell me general techniques to go head with the debugging?
>
> Below are the logs which are seen during a reboot.
>
> [ 425.832395,1] SysRq : Emergency Remount R/O

This looks like be a sys request from user space.
Application can write echo u > /proc/sysrq-trigger to trigger an
emergency remount.

You can hack "drivers/tty/sysrq.c" to print current task(to know who is doing).

Thanks,
Arun
>
> [ 425.876210,1] EXT4-fs (mmcblk0p36): re-mounted. Opts: (null)
> [ 425.925899,1] EXT4-fs (mmcblk0p33): re-mounted. Opts: (null)
> [ 425.928731,1] EXT4-fs (mmcblk0p29): re-mounted. Opts: (null)
> [ 425.955762,1] Emergency Remount complete
>
> [ 426.187136,0] Restarting system with command 'bootloader'.
> [ 426.187327,0] Current task:init(1) Parent task:swapper/0(0)
> [ 426.187430,0] Going down for restart now
>
>
> Regards,
>
> Priyaranjan
>
>
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