Re: [PATCH 1/8] mm: use zone lock guard in reserve_highatomic_pageblock()

[Dmitry Ilvokhin]

On Sat, Mar 07, 2026 at 02:16:41PM +0100, Peter Zijlstra wrote:
> On Fri, Mar 06, 2026 at 07:24:56PM +0100, Vlastimil Babka wrote:
> 
> > Yeah I don't think the guard construct in this case should be doing anything
> > here that wouldn't allow the compiler to compile to the exactly same result
> > as before? Either there's some problem with the infra, or we're just victim
> > of compiler heuristics. In both cases imho worth looking into rather than
> > rejecting the construct.
> 
> I'd love to look into it, but I can't seem to apply these patches to
> anything.
> 
> By virtue of not actually having the patches, I had to resort to b4, and
> I think the incantation is something like:
> 
>   b4 shazam cover.1772811429.git.d@xxxxxxxxxxxx
> 
> but it doesn't want to apply to anything I have at hand. Specifically, I
> tried Linus' tree and tip, which is most of what I have at hand.

Thanks for taking a look, Peter.

This series is based on mm-new and depends on my earlier patchset:

https://lore.kernel.org/all/cover.1772206930.git.d@xxxxxxxxxxxx/

Those patches are currently only in Andrew's mm-new tree, so this series
won't apply cleanly on Linus' tree or tip.

It should apply on top of mm-new from:

https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm