[Crash-utility] How does crash find booted kernel?

[Nan Xiao]

Hi Dave,

I reinstall the "RHEL 7.0" using the "minimal install", and the kernel
is not "debug"
version. So I also can't remember how this "debug" kernel comes. And
in /root folder,
I can't find any log file.

Anyway, this is not related to crash. Thanks for your and Buland'
effort and time!
Best Regards
Nan Xiao


On Mon, Nov 2, 2015 at 10:12 PM, Dave Anderson <anderson at redhat.com> wrote:
>
>
> ----- Original Message -----
>> Hi Buland,
>>
>> Thanks very much for your answer! After installing the right debuginfo package,
>> now crash works!
>>
>> BTW, if possible, could you spare a little time to explain other confusion: it seems
>> that I don't select whether "debug" version or not during install RHEL 7, why does it
>> install the "debug" version for me? Thanks!
>> Best Regards
>> Nan Xiao
>
> I haven't done a RHEL7 installation from scratch in quite some
> time, but with respect to the software selection stage, it gives
> you a handful of possibilities (Minimal Install, Basic Web Server,
> Virtualization Host, etc.), and with any of those selections you
> would get the standard kernel-<version> package.  I don't even
> think it's possible to get the kernel-debug-<version> package
> unless you did some kind of custom installation, or if it was
> installed after-the-fact.
>
> Your system should have log files in /root that show what packages
> were originally installed on the system.  Check them for evidence
> of which kernel was installed.
>
> Dave
>
>
>
>
>
>>
>>
>> On Mon, Nov 2, 2015 at 4:09 PM, Buland Kumar Singh
>> <6b65726e656c at gmail.com> wrote:
>> > On 2 November 2015 at 12:56, Nan Xiao <xiaonan830818 at gmail.com> wrote:
>> >>
>> >> Hi Buland,
>> >>
>> >> Firstly, thanks for your comments!
>> >>
>> >> Executing the following commands:
>> >>
>> >> [root at localhost ktap]# uname -r
>> >> 3.10.0-123.el7.x86_64.debug
>> >>
>> >> [root at localhost ktap]# rpm -q kernel-debuginfo
>> >> kernel-debuginfo-3.10.0-123.el7.x86_64
>> >>
>> >> [root at localhost ktap]# rpm -q kernel
>> >> kernel-3.10.0-123.el7.x86_64
>> >>
>> >> It seems all the versions are match. So I think it is not this issue,
>> >> thanks!
>> >> Best Regards
>> >> Nan Xiao
>> >>
>> >>
>> >
>> > Nan,
>> >
>> > The kernel running on your system is kernel-debug-3.10.0-123.el7.x86_64
>> >
>> > [root at localhost ktap]# uname -r
>> > 3.10.0-123.el7.x86_64.debug
>> >                         ^
>> >                         '....
>> >
>> > It is provided by kernel-debug-3.10.0-123.el7.x86_64.rpm
>> >
>> > The kernel-debuginfo package installed on your system is for normal kernel.
>> >
>> > [root at localhost ktap]# rpm -q kernel-debuginfo
>> > kernel-debuginfo-3.10.0-123.el7.x86_64
>> >
>> > To fix it, you need to install
>> > kernel-debug-debuginfo-3.10.0-123.el7.x86_64.rpm
>> >
>> > --
>> > BKS
>> >
>> > --
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