Re: [Crash-utility] [PATCH] crash: Do not use bt -t flag in panic_search()
----- Original Message -----
On Mon, 03 Aug 2015 12:30:22 -0400
Dave Anderson <anderson(a)prospeed.net> wrote:
>
>
> Ah, it must be because of the common user-kernel virtual address space on
> s390x?
Yes we have overlapping virtual address ranges for kernel and user space and user
space registers are stored at the start of the kernel stack.
But I am not sure, if that is the reason here (have to verify this).
Doesn't the -t option check all the stack memory and looks for valid symbol
addresses? So IMO everything found there could be by chance the address
of panic. Why is this no problem on x86?
I'm not sure what you mean. How could it be there by chance? Are you talking
about a highly unlikely situation where a user-space exception frame at the top
of the kernel stack happens to have a register containing a kernel virtual address
that's within the panic() function?
Dave
Michael
--
Crash-utility mailing list
Crash-utility(a)redhat.com
https://www.redhat.com/mailman/listinfo/crash-utility