Re: [PATCH v3] mm/memory: drop PROCESS_PAGES_NON_PREEMPT_BATCH

[David Hildenbrand]

On Mon, 09 Nov 2026 19:15:51 +0000, Shivank Garg wrote:
> clear_contig_highpages() clears the whole range at once under
> preemptible models. Otherwise it clears PROCESS_PAGES_NON_PREEMPT_BATCH
> pages at a time, with a cond_resched() in between. The batch is 32MB if
> the architecture defines clear_pages(), and one page otherwise.
> 
> Since commit 7dadeaa6e851 ("sched: Further restrict the preemption
> modes"), architectures that support lazy preemption only offer the
> full, lazy and RT preemption models, also with PREEMPT_DYNAMIC. x86 is
> one of them, and it is the only architecture that defines
> clear_pages(). So the 32MB batch is never used: whenever
> clear_contig_highpages() runs under a cooperative model, the batch is
> one page.
> 
> [...]

Applied, thanks!

tree: mm/core.git
branch: core-7.5.misc

Applied patches will appear soon in mm-next, followed by linux-next.

Please report any outstanding bugs that were missed during review, so we
can either drop the patch series or decide how to fix it up.

It is encouraged to provide Acked-bys, Reviewed-bys, and Tested-bys even
though the patches have already been applied. If possible, patch trailers
will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. Further, this is not a guarantee that the
patches will go upstream. If in doubt, please check the listed branch.

[1/1] mm/memory: drop PROCESS_PAGES_NON_PREEMPT_BATCH
      https://git.kernel.org/mm/core/c/6df321a9

-- 
Cheers,

David