linux-kernel - Re: [Patch v2] mm/sparse: only sub-section aligned range would be populated

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Message-ID: <1c817ced-8ad9-ce91-2992-94092bc065b3@redhat.com>
Date:   Thu, 6 Aug 2020 09:29:36 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Wei Yang <richard.weiyang@...il.com>,
        Wei Yang <richard.weiyang@...ux.alibaba.com>
Cc:     akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [Patch v2] mm/sparse: only sub-section aligned range would be
 populated

On 05.08.20 23:49, Wei Yang wrote:
> On Fri, Jul 03, 2020 at 11:18:28AM +0800, Wei Yang wrote:
>> There are two code path which invoke __populate_section_memmap()
>>
>>  * sparse_init_nid()
>>  * sparse_add_section()
>>
>> For both case, we are sure the memory range is sub-section aligned.
>>
>>  * we pass PAGES_PER_SECTION to sparse_init_nid()
>>  * we check range by check_pfn_span() before calling
>>    sparse_add_section()
>>
>> Also, the counterpart of __populate_section_memmap(), we don't do such
>> calculation and check since the range is checked by check_pfn_span() in
>> __remove_pages().
>>
>> Clear the calculation and check to keep it simple and comply with its
>> counterpart.
>>
>> Signed-off-by: Wei Yang <richard.weiyang@...ux.alibaba.com>
>>
> 
> Hi, Andrew,
> 
> Is this one picked up?

I can spot it in -next via the -mm tree:

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=68ad9becb23be14622e39ed36e5b0621a90a41d9


-- 
Thanks,

David / dhildenb