* Crash dump?
@ 2020-05-15 16:47 Subhashini Rao Beerisetty
2020-05-15 17:46 ` 慕冬亮
0 siblings, 1 reply; 3+ messages in thread
From: Subhashini Rao Beerisetty @ 2020-05-15 16:47 UTC (permalink / raw)
To: kernelnewbies
Hi all,
In Kernel, what needs to be configured to get the crash dump?
Can someone clarify me with the sequence of steps to get the crash dump..
Thanks,
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Crash dump?
2020-05-15 16:47 Crash dump? Subhashini Rao Beerisetty
@ 2020-05-15 17:46 ` 慕冬亮
2020-05-19 16:46 ` Satya Naik
0 siblings, 1 reply; 3+ messages in thread
From: 慕冬亮 @ 2020-05-15 17:46 UTC (permalink / raw)
To: Subhashini Rao Beerisetty; +Cc: kernelnewbies
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> On May 15, 2020, at 12:47 PM, Subhashini Rao Beerisetty <subhashbeerisetty@gmail.com> wrote:
>
> Hi all,
>
> In Kernel, what needs to be configured to get the crash dump?
> Can someone clarify me with the sequence of steps to get the crash dump..
>
Some materials for specific Linux distributions(e.g., Redhat, Debian):
https://mudongliang.github.io/2018/07/02/debian-enable-kernel-dump.html <https://mudongliang.github.io/2018/07/02/debian-enable-kernel-dump.html>
https://www.bentasker.co.uk/documentation/linux/312-installing-and-configuring-kdump-on-debian-jessie <https://www.bentasker.co.uk/documentation/linux/312-installing-and-configuring-kdump-on-debian-jessie>
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/kernel_administration_guide/kernel_crash_dump_guide <https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/kernel_administration_guide/kernel_crash_dump_guide>
https://fedoraproject.org/wiki/How_to_use_kdump_to_debug_kernel_crashes <https://fedoraproject.org/wiki/How_to_use_kdump_to_debug_kernel_crashes>
> Thanks,
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
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_______________________________________________
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https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Crash dump?
2020-05-15 17:46 ` 慕冬亮
@ 2020-05-19 16:46 ` Satya Naik
0 siblings, 0 replies; 3+ messages in thread
From: Satya Naik @ 2020-05-19 16:46 UTC (permalink / raw)
To: 慕冬亮; +Cc: Subhashini Rao Beerisetty, kernelnewbies
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Hi ,
kdump need 2 kernel primary and secondary. Primary will be panicked, then
secondary will do capture coredump.
In boot loader/ kernel command line specify crashkernel=256MB or more,
ensure secondary kernel is small in size so that it can be boot within this
memory, oom should not happen.
Primary config:
CONFIG_SYSFS=y
CONFIG_KEXEC=y
CONFIG_DEBUG_INFO=y
Secondary Config:
CONFIG_PHYSICAL_START=0x100000
CONFIG_RELOCATABLE=y
CONFIG_CRASH_DUMP=y
load secondary kernel using
kexec -p <>
After kernel panic, secondary kernel will be invoked. The secondary kernel
should save core from /proc/vmcore and reboot again.
Refer kdump kernel docs :
https://www.kernel.org/doc/Documentation/kdump/kdump.txt
Thanks,
Satya
On Fri, May 15, 2020 at 11:17 PM 慕冬亮 <mudongliangabcd@gmail.com> wrote:
>
>
> On May 15, 2020, at 12:47 PM, Subhashini Rao Beerisetty <
> subhashbeerisetty@gmail.com> wrote:
>
> Hi all,
>
> In Kernel, what needs to be configured to get the crash dump?
> Can someone clarify me with the sequence of steps to get the crash dump..
>
>
> Some materials for specific Linux distributions(e.g., Redhat, Debian):
>
> https://mudongliang.github.io/2018/07/02/debian-enable-kernel-dump.html
>
>
> https://www.bentasker.co.uk/documentation/linux/312-installing-and-configuring-kdump-on-debian-jessie
>
>
> https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/kernel_administration_guide/kernel_crash_dump_guide
>
> https://fedoraproject.org/wiki/How_to_use_kdump_to_debug_kernel_crashes
>
>
>
> Thanks,
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
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2020-05-15 16:47 Crash dump? Subhashini Rao Beerisetty
2020-05-15 17:46 ` 慕冬亮
2020-05-19 16:46 ` Satya Naik
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