Re: [OE-core] [PATCH 3/3] linux-yocto/5.8: update to v5.8.2

["Anuj Mittal" <anuj.mittal@intel.com>]

On Sun, 2020-08-23 at 23:03 -0400, Bruce Ashfield wrote:
> 
> 
> On Sun, Aug 23, 2020 at 7:59 PM Mittal, Anuj <anuj.mittal@intel.com>
> wrote:
> > On Sat, 2020-08-22 at 01:20 -0700, Khem Raj wrote:
> > > Hi Bruce
> > > 
> > > On rv64 I am seeing an error while building lttng
> > > 
> > >  #error "LTTng-modules requires CONFIG_KPROBES on kernels >=
> > 5.7.0"
> > > >    20 | # error "LTTng-modules requires CONFIG_KPROBES on
> > kernels
> > > > >= 5.7.0"
> > > >       |   ^~~~~
> > > 
> > > I wonder if we need to update defconfig
> > 
> > I see the same failure with linux-yocto-rt kernel as well.
> > 
> 
> -rt doesn't enable kprobes, so yes, with the latest lttng, it would
> trigger that issue.
> 
> Traditionally -rt had issues with kprobes, but that is resolved now.
> Rather than adding the overhead, the enablement is still on demand
> for -rt.
> 
> That being said, it looks like lttng has forced my hand, I just
> enabled the config by default in -rt and don't see any issues. 
> 
> I'll send a patch on Monday to fix it up.


Thanks Bruce. Should PREFERRRED_VERSION of linux-yocto-rt should also
be explicitly set like that of linux-yocto? I was wondering if there is
a specific reason why we don't set version for that kernel for qemu and
BSPs?

Thanks,

Anuj