Venkappa Mala <Venkappa.Mala at lntinfotech.com> writes: I have added the kexec list and corrected the lkml addresses. In principle it should not be too hard to use kexec on panic support on arm. I don't do any arm development so I don't have a clue what the status of the support is on arm. > Hi, > > With respect to "Linux kernel crash dumps for ARM", i have some doubts which are described as below. > > If the machine has crashed so badly that you cannot enter commands or > the disk is not available then you have three options :- > > (1) Hand copy the text from the screen > > (2) capture crash logs using Minicom. > > (3) save the crash data to a floppy disk or video rom or a swap partition or reserved memory. > > In the above three options, 1 & 2 are known and works as well. > > Regarding 3 option, > ---------------------------- > i would like to support for ARM11. > > As far as i know, the supported linux kernel crash dumps are > "lkcd, netdump,diskdump, mini kernel dump and kdump/kexec". > These are supported for x86 and PowerPC architectures with some constrains. > > i have some queries with respect to ARM supports, these are > > 1.) kexec is supported in latest kernels > example: 2.6.29 kernel > File: arch/arm/kernel/machine_kexec.c > > - is this working well or is there any constraints? > > 2) As per kexec supports, kexec-tool is required and this allows you to load directly > to a new kernel from the currently running one > > As from my side, i am not able to find arm implementation support in kexec-tools/crash sources. > > - is kexce-tool supported for ARM or not? > > 3) In lkcd, netdump,diskdump, mini kernel dump and kdump/kexec tools, > > - which is the best choice for ARM or are there any best crash dump tool for ARM? > > Please clarify my queries. > > Best Regards, > Venkappa Eric
