Re: [PATCH] mm/page_alloc: Work around a pahole limitation with zero-sized struct pagesets

[Mel Gorman]

On Fri, May 28, 2021 at 08:09:39AM +0000, David Laight wrote:
> From: Andrii Nakryiko
> > Sent: 27 May 2021 15:42
> ...
> > I agree that empty structs are useful, but here we are talking about
> > per-CPU variables only, which is the first use case so far, as far as
> > I can see. If we had pahole 1.22 released and widely packaged it could
> > have been a viable option to force it on everyone. 
> ...
> 
> Would it be feasible to put the sources for pahole into the
> kernel repository and build it at the same time as objtool?
> 

We don't store other build dependencies like compilers, binutils etc in
the kernel repository even though minimum versions are mandated.
Obviously tools/ exists but for the most part, they are tools that do
not exist in other repositories and are kernel-specific. I don't know if
pahole would be accepted and it introduces the possibility that upstream
pahole and the kernel fork of it would diverge.

-- 
Mel Gorman
SUSE Labs