From: Andrew Morton <akpm@linux-foundation.org>
To: Wei Yang <richard.weiyang@gmail.com>
Cc: vbabka@suse.cz, mgorman@techsingularity.net, mhocko@suse.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/page_alloc: return 0 in case this node has no page within the zone
Date: Mon, 6 Feb 2017 15:29:32 -0800 [thread overview]
Message-ID: <20170206152932.19e7947df487b96b8912e524@linux-foundation.org> (raw)
In-Reply-To: <20170206154314.15705-1-richard.weiyang@gmail.com>
On Mon, 6 Feb 2017 23:43:14 +0800 Wei Yang <richard.weiyang@gmail.com> wrote:
> The whole memory space is divided into several zones and nodes may have no
> page in some zones. In this case, the __absent_pages_in_range() would
> return 0, since the range it is searching for is an empty range.
>
> Also this happens more often to those nodes with higher memory range when
> there are more nodes, which is a trend for future architectures.
>
> This patch checks the zone range after clamp and adjustment, return 0 if
> the range is an empty range.
What are the user-visible runtime effects of this change?
next prev parent reply other threads:[~2017-02-06 23:29 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-06 15:43 Wei Yang
2017-02-06 23:29 ` Andrew Morton [this message]
2017-02-07 15:07 ` Wei Yang
2017-02-07 9:45 ` Michal Hocko
2017-02-07 15:32 ` Wei Yang
2017-02-07 15:41 ` Michal Hocko
2017-02-08 14:05 ` Wei Yang
2017-02-08 14:39 ` Michal Hocko
2017-02-09 13:59 ` Wei Yang
2017-02-22 8:49 ` Michal Hocko
2017-02-22 10:51 ` Wei Yang
2017-02-22 11:45 ` Michal Hocko
2017-02-22 14:18 ` Wei Yang
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