Re: [PATCH 0/3] selftests/bpf: Fixes for out-of-tree builds

[Eduard Zingerman <eddyz87@gmail.com>]

On Wed, 2026-09-23 at 14:06 -0600, Nico Pache (Red Hat) wrote:
> 
> On 9/21/26 3:42 PM, Eduard Zingerman wrote:
> > On Mon, 2026-09-21 at 15:15 -0600, Nico Pache (Red Hat) wrote:
> > > 
> > > On 9/21/26 3:04 PM, Eduard Zingerman wrote:
> > > > On Mon, 2026-09-21 at 14:40 -0600, Nico Pache (Red Hat) wrote:
> > > > 
> > > > ...
> > > > 
> > > > > Given your series was defferred, and there is a "rewrite" coming, what would
> > > > > be the best approach to working together (between us three) to get these
> > > > > fixes in that series too. 
> > > > 
> > > > The, "rewrite", as you call it, had landed today.
> > > 
> > > oh thats great news. I checked on Friday and didnt see it. Thanks for the update :)
> > > 
> > > > So the series in question can be re-spun.
> > > > Regarding your patch on top of it, it appears you can just post is separately.
> > > > However, I am inclined to be confrontational towards changes like this one.
> > > > The purpose of the selftests makefile is to run selftests as appropriate
> > > > for current tip of the kernel tree using a very specific kernel configuration.
> > > > Main users of this makefile are BPF developers and BPF CI.
> > > 
> > > Yeah we are trying to reincorporate BPF as part of our CI. It has bit rotted in
> > > the Fedora env, and our large amount of build variant is where things are
> > > starting to go wrong. We need to build selftests for multiple variants, and be
> > > able to specify which variant we are building for. Hence the out-of-tree build
> > > with specific vmlinux.
> > 
> > Why can't you build the kernel and the selftests in the same out of tree location?
> > The change you are proposing is contained, but it's a death by thousand cuts,
> > the selftests makefile is quite a Frankenstein's monster already.
> 
> Due to incremental builds, and tool building in different env's

Can you copy vmlinux to the output directory?

> > 
> > > Is there any other approach you'd suggest? I personally dont work on BPF, but am
> > > trying to cleanup/fix our selftests builds for Upstream/Fedora CI.
> > 
> > How many Fedora-specific kernel patches do you carry already?
> 
> So far its just the series Im replying to here, and the commit I appended.

Okay, I was under impression that distros bear a ton of custom patches
and that adding another one adjusting random makefiles won't make a
difference.

If that is not the case, then I'm being unreasonable and the change is small.