linux-kernel - Re: [PATCH 2/5] mm/huge_memory: convert "tva_flags" to "enum tva_type" for thp_vma_allowable

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Message-ID: <e91c3b2c-b3b1-4271-860b-89c8e0d2e2e9@gmail.com>
Date: Mon, 28 Jul 2025 15:09:28 +0100
From: Usama Arif <usamaarif642@...il.com>
To: David Hildenbrand <david@...hat.com>,
 Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org
Cc: linux-fsdevel@...r.kernel.org, corbet@....net, rppt@...nel.org,
 surenb@...gle.com, mhocko@...e.com, hannes@...xchg.org, baohua@...nel.org,
 shakeel.butt@...ux.dev, riel@...riel.com, ziy@...dia.com,
 laoar.shao@...il.com, dev.jain@....com, baolin.wang@...ux.alibaba.com,
 npache@...hat.com, lorenzo.stoakes@...cle.com, Liam.Howlett@...cle.com,
 ryan.roberts@....com, vbabka@...e.cz, jannh@...gle.com,
 Arnd Bergmann <arnd@...db.de>, sj@...nel.org, linux-kernel@...r.kernel.org,
 linux-doc@...r.kernel.org, kernel-team@...a.com
Subject: Re: [PATCH 2/5] mm/huge_memory: convert "tva_flags" to "enum
 tva_type" for thp_vma_allowable_order*()



On 28/07/2025 14:28, David Hildenbrand wrote:
> On 25.07.25 18:22, Usama Arif wrote:
>> From: David Hildenbrand <david@...hat.com>
>>
>> Describing the context through a type is much clearer, and good enough
>> for our case.
>>
>> We have:
>> * smaps handling for showing "THPeligible"
>> * Pagefault handling
>> * khugepaged handling
>> * Forced collapse handling: primarily MADV_COLLAPSE, but one other odd case
>>
>> Really, we want to ignore sysfs only when we are forcing a collapse
>> through MADV_COLLAPSE, otherwise we want to enforce.
>>
>> With this change, we immediately know if we are in the forced collapse
>> case, which will be valuable next.
>>
>> Signed-off-by: David Hildenbrand <david@...hat.com>
>> Acked-by: Usama Arif <usamaarif642@...il.com>
> 
> Nit: if you forward patches untouched, make sure to add your SOB as well.
> 

Thanks!

Signed-off-by: Usama Arif <usamaarif642@...il.com>

Just adding above incase (hopefully) this revision gets into mm-new.
If it doesn't, I will add the sign off in the next revision.