linux-kernel - Re: [PATCH v1 2/2] drivers/base/memory: determine and store zone for single-zone memory blocks

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Message-ID: <4632dc1a-e561-f04e-421c-a770f9271bbd@redhat.com>
Date:   Mon, 31 Jan 2022 11:42:09 +0100
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Oscar Salvador <osalvador@...e.de>,
        Rafael Parra <rparrazo@...hat.com>
Subject: Re: [PATCH v1 2/2] drivers/base/memory: determine and store zone for
 single-zone memory blocks

>  			 !IS_ALIGNED(start_pfn, pageblock_nr_pages) ||
> -			 !IS_ALIGNED(start_pfn + nr_pages, PAGES_PER_SECTION)))
> +			 !IS_ALIGNED(start_pfn + nr_pages, PAGES_PER_SECTION) ||
> +			 page_zone(pfn_to_page(start_pfn)) != zone ||
> +			 page_zone(pfn_to_page(end_pfn - 1)) != zone))

I just realized that we have to do these sanity checks after our check
for memory holes.

-- 
Thanks,

David / dhildenb