linux-kernel - Re: Kexec couldn't reboot capture kernel on pandaboard ES with OMAP4460

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 11 Apr 2013 12:46:07 +0800
From:	Li Haifeng <omycle@...il.com>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	pandaboard@...glegroups.com, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: Kexec couldn't reboot capture kernel on pandaboard ES with OMAP4460

2013/4/10 Stephen Warren <swarren@...dotorg.org>:
> On 04/10/2013 03:35 AM, Li Haifeng wrote:
>> Hi, everyone.
>>
>> Recently, I try to run kdump on pandaboard ES with omap4460. After
>> load capture kernel by "kexec -l" and execute "kexec -e", the serial
>> port output "Starting new kernel" and "Bye", then the system hangs up.
>>
>> I have tried the upstream Linux Kernel v3.4 and v3.8. All are with this issue.
>
> This is a shot in the dark. I assume you have SMP enabled. Can you use
> hotplug to remove all CPUs other than CPU0, so that the kexec happens on
> the boot CPU? That is certainly necessary for kexec to work correctly on
> Tegra.

Thanks for your attention.

I do disable SMP feature. And the .config file for v3.8 could be found here:
http://pastehtml.com/view/cylyrfejt.txt

The log and operation could be found here:
http://pastehtml.com/view/cylyfrb3a.txt

Some key setting list below.

bootargs:
rw vram=32M fixrtc mem=1G@...0000000 root=/dev/mmcblk0p2
console=ttyO2,115200n8 rootwait crashkernel=64M@...2000000

operation:
/ # ./kexec -l  --append="rw vram=32M fixrtc  root=/dev/mmcblk0p2 console=ttyO2,
115200n8 rootwait" uImage
/ # ./kexec -d -e

The output:
[   57.373687] Starting new kernel
[   57.377044] Bye!

Then system hangs.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/