On 04/11/17(Sat) 17:20, Paul Irofti wrote:
> Hi,
>
> Someone, somewhere (perhaps on bugs@?) said they would like to see
> something useful when typing show panic on a page fault'd kernel. That
> struck very close to home so I went ahead and did it.
>
> The following diff shows the uvm_fault and the first trace entry in an
> attempt to mimic a real show panic. The uvm_fault entry is extra.
>
> Currently I only wrote support for amd64 but I can add support for
> other architectures if you guys like it.
>
> Thoughts?
I think you should just change the printf("uvm_fault...) into a panic.
This introduces a behavior change when DDB is not compiled in. In such
kernels trap informations from 'we_re_toast' won't be printed. I doubt
we care about such kernels, but if we do, when uvm_fault(9) returns an
error its arguments and the traceback are generally enough to debug the
problem.
