Re: [PATCH] livepatch: Remove reliable stacktrace check in klp_try_switch_task()

[Josh Poimboeuf]

On Sun, Jul 15, 2018 at 01:05:56PM +0530, Kamalesh Babulal wrote:
> On Saturday 14 July 2018 12:07 AM, Josh Poimboeuf wrote:
> > > We bail out during patch registration for architectures, those don't
> > > support reliable stack trace.
> > 
> > Does anybody know if that change was intentional?  I thought the plan
> > was to allow non-consistency-model arches to still use livepatch, and
> > that they'd just have to 'force' patches to completion instead.  That
> > seems a little more forgiving.
> > 
> 
> The initial proposal was to allow 'force' feature on architectures
> without HAVE_RELIABLE_STACKTRACE support and use pr_notice() to warn
> user about the non-availability of consistency model. It was argued
> against, as it will encourage people to use it as an alternative instead
> of adding HAVE_RELIABLE_STACKTRACE support to the kernel.

Ok, looking through the archives, I found it:

  https://lkml.kernel.org/r/20171221151428.rt4dlizxb5nqhb3h@xxxxxxxxxxxxxxx

I'm not sure I agree with that conclusion, but nobody has complained
about it, so it's probably fine...

-- 
Josh