linux-kernel - Re: [PATCH v4] hugetlb: simplify hugetlb handling in follow_page

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Message-ID: <Y18B9yYTAqrQ9Zvu@monkey>
Date:   Sun, 30 Oct 2022 16:00:07 -0700
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Peter Xu <peterx@...hat.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-ia64@...r.kernel.org,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        David Hildenbrand <david@...hat.com>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        Naoya Horiguchi <naoya.horiguchi@...ux.dev>,
        Michael Ellerman <mpe@...erman.id.au>,
        Muchun Song <songmuchun@...edance.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v4] hugetlb: simplify hugetlb handling in follow_page_mask

On 10/30/22 15:45, Peter Xu wrote:
> On Fri, Oct 28, 2022 at 11:11:08AM -0700, Mike Kravetz wrote:
> > +	} else {
> > +		if (is_hugetlb_entry_migration(entry)) {
> > +			spin_unlock(ptl);
> > +			hugetlb_vma_unlock_read(vma);
> 
> Just noticed it when pulled the last mm-unstable: this line seems to be a
> left-over of v3, while not needed now?
> 
> > +			__migration_entry_wait_huge(pte, ptl);
> > +			goto retry;
> > +		}

Thanks Peter!

Sent v5 with the that line removed.

-- 
Mike Kravetz