Re: [PATCH] MAINTAINERS: fix regex pattern in CORE MM category

[Lorenzo Stoakes <ljs@kernel.org>]

On Thu, Apr 23, 2026 at 10:39:59AM +0100, Pedro Falcato wrote:
> On Wed, Apr 22, 2026 at 05:32:26PM -0700, SeongJae Park wrote:
> > On Wed, 22 Apr 2026 13:37:26 +0100 Pedro Falcato <pfalcato@suse.de> wrote:
> >
> > > The pattern "include/linux/page[-_]*" matches every file that starts with
> > > "page", because it's a regex and not a glob (so it has the meaning of
> > > include/linux/page + match [-_] 0+ times).
> > >
> > > Fix it up into a more regex-correct expression. Doing so reduces CC's
> > > drastically in patches that touch pagemap.h (which is maintained as part of
> > > PAGE CACHE).
> > >
> > > As a side-effect, move linux/pageblock-flags.h explicitly under PAGE
> > > ALLOCATOR.
> > >
> > > Link: https://lore.kernel.org/linux-mm/20260422005608.342028-1-fmayle@google.com/
> >
> > Just thinking loud.  I was initially wondering the purpose of this link.  Seems
> > this was added to show the example of pagemap.h touching patch that can
> > dmonstrate how many CC can be reduced.  I once thought about suggesting to add
> > the number or the context on the description, but realize it is too trivial.
> > So just thinking loud.
>
> Right, I probably chucked that link in there without explaining it well
> enough. I was having my leasurely read through linux-mm when I noticed that
> particular patch had _way_ too many CC's. I had a quick look and, yeah, found
> the issue.
>
> For what it's worth there are many such CC's out there. A group of 6-8 MM people
> get CC'd on pretty much everything that happens in the kernel. Not super wieldy.
>
> One thing at a time, I guess.

Yup this is a useful addition, the link is fine one thing at a time indeed :)

>
> >
> > $ # Without this patch
> > $ ./scripts/get_maintainer.pl ./0001-mm-limit-filemap-fault-readahead-to-vma-boundaries.patch | wc -l
> > 13
> > $ # With this patch
> > $ ./scripts/get_maintainer.pl ./0001-mm-limit-filemap-fault-readahead-to-vma-boundaries.patch | wc -l
> > 6
> >
> > > Signed-off-by: Pedro Falcato <pfalcato@suse.de>
> >
> > Reviewed-by: SeongJae Park <sj@kernel.org>
>
> Thanks!
>
> --
> Pedro

Cheers, Lorenzo