linux-kernel - Re: [PATCH RFC 02/39] mm/rmap: introduce and use hugetlb_remove

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Message-ID: <e2061158-678c-4a3c-b94b-88005cff15b1@redhat.com>
Date:   Wed, 6 Dec 2023 13:11:01 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Yin Fengwei <fengwei.yin@...el.com>, linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Hugh Dickins <hughd@...gle.com>,
        Ryan Roberts <ryan.roberts@....com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        Peter Xu <peterx@...hat.com>
Subject: Re: [PATCH RFC 02/39] mm/rmap: introduce and use
 hugetlb_remove_rmap()

On 06.12.23 02:22, Yin Fengwei wrote:
> 
> 
> On 12/4/23 22:21, David Hildenbrand wrote:
>> hugetlb rmap handling differs quite a lot from "ordinary" rmap code.
>> For example, hugetlb currently only supports entire mappings, and treats
>> any mapping as mapped using a single "logical PTE". Let's move it out
>> of the way so we can overhaul our "ordinary" rmap.
>> implementation/interface.
>>
>> Let's introduce and use hugetlb_remove_rmap() and remove the hugetlb
>> code from page_remove_rmap(). This effectively removes one check on the
>> small-folio path as well.
>>
>> Note: all possible candidates that need care are page_remove_rmap() that
>>        pass compound=true.
>>
>> Signed-off-by: David Hildenbrand <david@...hat.com>
> 
> 

I suspect you wanted to place your RB tag here? :)

-- 
Cheers,

David / dhildenb