linux-kernel - Re: [PATCH RFC 06/35] mm/page_alloc: reject unreasonable folio/compound page sizes in alloc_contig_range

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Message-Id: <20250822170746.53309-1-sj@kernel.org>
Date: Fri, 22 Aug 2025 10:07:46 -0700
From: SeongJae Park <sj@...nel.org>
To: David Hildenbrand <david@...hat.com>
Cc: SeongJae Park <sj@...nel.org>,
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Subject: Re: [PATCH RFC 06/35] mm/page_alloc: reject unreasonable folio/compound page sizes in alloc_contig_range_noprof()

On Thu, 21 Aug 2025 22:06:32 +0200 David Hildenbrand <david@...hat.com> wrote:

> Let's reject them early,

I like early failures. :)

> which in turn makes folio_alloc_gigantic() reject
> them properly.
> 
> To avoid converting from order to nr_pages, let's just add MAX_FOLIO_ORDER
> and calculate MAX_FOLIO_NR_PAGES based on that.
> 
> Signed-off-by: David Hildenbrand <david@...hat.com>

Acked-by: SeongJae Park <sj@...nel.org>


Thanks,
SJ

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