From: Andrew Morton <akpm@linux-foundation.org>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] compaction: fix isolate_migratepages_block() for THP=n
Date: Tue, 28 Apr 2015 15:14:20 -0700 [thread overview]
Message-ID: <20150428151420.227e7ac34745e9fe8e9bc145@linux-foundation.org> (raw)
In-Reply-To: <1430134006-215317-1-git-send-email-kirill.shutemov@linux.intel.com>
On Mon, 27 Apr 2015 14:26:46 +0300 "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
> PageTrans* helpers are always-false if THP is disabled compile-time.
> It means the fucntion will fail to detect hugetlb pages in this case.
>
> Let's use PageCompound() instead. With small tweak to how we calculate
> next low_pfn it will make function ready to see tail pages.
<scratches head>
So this patch has no runtime effects at present? It is preparation for
something else?
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next prev parent reply other threads:[~2015-04-28 22:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-27 11:26 Kirill A. Shutemov
2015-04-27 11:50 ` Vlastimil Babka
2015-04-28 22:14 ` Andrew Morton [this message]
2015-04-28 22:28 ` Kirill A. Shutemov
2015-04-28 22:37 ` Andrew Morton
2015-04-28 22:44 ` Kirill A. Shutemov
2015-06-03 9:14 ` Vlastimil Babka
2015-06-03 11:24 ` Kirill A. Shutemov
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