Re: [PATCH v7 02/31] mm: page_alloc: propagate PageReported flag across buddy splits

[Gregory Price]

On Thu, May 14, 2026 at 11:34:14AM -0400, Michael S. Tsirkin wrote:
> On Thu, May 14, 2026 at 11:32:26AM -0400, Gregory Price wrote:
> > > > 
> > > > Maybe mildly out of scope but worth asking:  Are there other flags that
> > > > should be retained/propogated on a split?  If so, rather than pass
> > > > was_reported, should we just take a temporary copy of the page flags and
> > > > pass them all in?
> > > > 
> > > > ~Gregory
> > > 
> > > 
> > > Not that I can see, no.
> > > 
> > 
> > You do this exact thing again later :]
> > 
> > https://lore.kernel.org/linux-mm/9a22e0f9bbe1278913754db6df76e291a006181a.1778616612.git.mst@xxxxxxxxxx/
> > 
> > ~Gregory
> 
> I mean yes, reported and zeroed) Just zeroed does not exist at this
> stage in the series.
>

More of a forward looking question: if we already know we're adding
was_reported and was_zeroed, maybe we should just pass the page flags
through entirely and let expand() check them instead of passing it
through individually.

We end up doing something similar with post_alloc_hook later as well, so
I'm wondering if there's a general improvement that can be made here.

~Gregory