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 [ 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
On Wed, Feb 19, 2014 at 6:14 PM, Priyaranjan Das <priyaranjan456789@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 [ 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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Adding the linux-ext4 mailing list too. - Regards, Rohan
Hi Priyaranjan, On Wed, Feb 19, 2014 at 6:14 PM, Priyaranjan Das <priyaranjan456789@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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On Thu, 27 Feb 2014 09:43:35 +0530, Arun KS said:
[ 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).
Note that if it came in courtesy of alt-SYSRQ keyboard request, then current-> won't point anywhere meaningful.
Seems like an android system and the reboot reason says boot loader. What command causes this to happen? On Feb 26, 2014 10:44 PM, <Valdis.Kletnieks@vt.edu> wrote:
On Thu, 27 Feb 2014 09:43:35 +0530, Arun KS said:
[ 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).
Note that if it came in courtesy of alt-SYSRQ keyboard request, then current-> won't point anywhere meaningful.
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Probably , adb reboot bootlooader command from the host to which the device is connected. Thanks and regards, Vignesh Radhakrishnan On Sat, Mar 1, 2014 at 9:56 AM, Subramaniam Appadodharana < c.a.subramaniam@gmail.com> wrote:
Seems like an android system and the reboot reason says boot loader. What command causes this to happen? On Feb 26, 2014 10:44 PM, <Valdis.Kletnieks@vt.edu> wrote:
On Thu, 27 Feb 2014 09:43:35 +0530, Arun KS said:
[ 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).
Note that if it came in courtesy of alt-SYSRQ keyboard request, then current-> won't point anywhere meaningful.
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On Mon, Mar 3, 2014 at 3:22 PM, Vignesh Radhakrishnan <vignesh1192@gmail.com
wrote:
Probably , adb reboot bootlooader command from the host to which the device is connected.
PD : No, that command wasn't executed from the host.
Thanks and regards, Vignesh Radhakrishnan
On Sat, Mar 1, 2014 at 9:56 AM, Subramaniam Appadodharana < c.a.subramaniam@gmail.com> wrote:
Seems like an android system and the reboot reason says boot loader. What command causes this to happen? On Feb 26, 2014 10:44 PM, <Valdis.Kletnieks@vt.edu> wrote:
On Thu, 27 Feb 2014 09:43:35 +0530, Arun KS said:
[ 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).
Note that if it came in courtesy of alt-SYSRQ keyboard request, then current-> won't point anywhere meaningful.
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-- http://vigneshradhakrishnan.blogspot.com/
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participants (7)
-
Arun KS -
priyaranjan -
Priyaranjan Das -
Rohan Puri -
Subramaniam Appadodharana -
Valdis.Kletnieks＠vt.edu -
Vignesh Radhakrishnan