linux-kernel - Re: [PATCH v1 03/12] mm/rmap: convert make_device_exclusive_range() to make_device

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Message-ID: <cf48fc0a-a80e-437f-a969-36b268d7e2ee@redhat.com>
Date: Thu, 30 Jan 2025 10:04:13 +0100
From: David Hildenbrand <david@...hat.com>
To: Alistair Popple <apopple@...dia.com>
Cc: linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
 dri-devel@...ts.freedesktop.org, linux-mm@...ck.org,
 nouveau@...ts.freedesktop.org, Andrew Morton <akpm@...ux-foundation.org>,
 Jérôme Glisse <jglisse@...hat.com>,
 Jonathan Corbet <corbet@....net>, Alex Shi <alexs@...nel.org>,
 Yanteng Si <si.yanteng@...ux.dev>, Karol Herbst <kherbst@...hat.com>,
 Lyude Paul <lyude@...hat.com>, Danilo Krummrich <dakr@...nel.org>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
 Pasha Tatashin <pasha.tatashin@...een.com>, Peter Xu <peterx@...hat.com>,
 Jason Gunthorpe <jgg@...dia.com>
Subject: Re: [PATCH v1 03/12] mm/rmap: convert make_device_exclusive_range()
 to make_device_exclusive()

>> diff --git a/mm/rmap.c b/mm/rmap.c
>> index 17fbfa61f7ef..676df4fba5b0 100644
>> --- a/mm/rmap.c
>> +++ b/mm/rmap.c
>> @@ -2495,70 +2495,78 @@ static bool folio_make_device_exclusive(struct folio *folio,
>>   		.arg = &args,
>>   	};
>>   
>> -	/*
>> -	 * Restrict to anonymous folios for now to avoid potential writeback
>> -	 * issues.
>> -	 */
>> -	if (!folio_test_anon(folio) || folio_test_hugetlb(folio))
>> -		return false;
> 
> A bit of churn with the previous patch but I suppose it makes a stable backport
> of the previous patch easier.

Yes, that's the idea.

Thanks!

-- 
Cheers,

David / dhildenb