linux-kernel - Re: [PATCH v2 6/7] mm/hmm: remove hugetlbfs check in hmm_vma_walk

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Message-ID: <20190726062437.GC22881@lst.de>
Date:   Fri, 26 Jul 2019 08:24:37 +0200
From:   Christoph Hellwig <hch@....de>
To:     Ralph Campbell <rcampbell@...dia.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        nouveau@...ts.freedesktop.org,
        Jérôme Glisse <jglisse@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v2 6/7] mm/hmm: remove hugetlbfs check in
 hmm_vma_walk_pmd

On Thu, Jul 25, 2019 at 05:56:49PM -0700, Ralph Campbell wrote:
> walk_page_range() will only call hmm_vma_walk_hugetlb_entry() for
> hugetlbfs pages and doesn't call hmm_vma_walk_pmd() in this case.
> Therefore, it is safe to remove the check for vma->vm_flags & VM_HUGETLB
> in hmm_vma_walk_pmd().
> 
> Signed-off-by: Ralph Campbell <rcampbell@...dia.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>