From: Matthew Wilcox <willy@infradead.org>
To: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH next] mm/migrate: fix remove_migration_pte() of hugetlb entry
Date: Mon, 28 Feb 2022 20:49:28 +0000 [thread overview]
Message-ID: <Yh01WH6CdHjpUFkZ@casper.infradead.org> (raw)
In-Reply-To: <bd28ebcf-4d42-7184-8189-ffed6fe7d4dc@google.com>
On Sat, Feb 26, 2022 at 06:25:15PM -0800, Hugh Dickins wrote:
> - if (!folio_test_ksm(folio))
> + /* Skip call in common case, plus .pgoff is invalid for KSM */
> + if (pvmw.nr_pages != 1 && !folio_test_hugetlb(folio))
> idx = linear_page_index(vma, pvmw.address) - pvmw.pgoff;
How do you feel about this instead?
- if (!folio_test_ksm(folio))
+ /* pgoff is invalid for ksm pages, but they are never large */
+ if (folio_test_large(folio) && !folio_test_hugetlb(folio))
idx = linear_page_index(vma, pvmw.address) - pvmw.pgoff;
next prev parent reply other threads:[~2022-02-28 20:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-27 2:25 Hugh Dickins
2022-02-28 20:49 ` Matthew Wilcox [this message]
2022-02-28 22:18 ` Hugh Dickins
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