From: Vlastimil Babka <vbabka@suse.cz>
To: Michal Hocko <mhocko@kernel.org>, linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Xishi Qiu <qiuxishi@huawei.com>,
zhong jiang <zhongjiang@huawei.com>,
Joonsoo Kim <js1304@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
Michal Hocko <mhocko@suse.com>
Subject: Re: [PATCH 1/4] mm, memory_hotplug: simplify empty node mask handling in new_node_page
Date: Thu, 8 Jun 2017 10:15:16 +0200 [thread overview]
Message-ID: <f8f22a22-355d-44d9-69d3-492ea9e24c8f@suse.cz> (raw)
In-Reply-To: <20170608074553.22152-2-mhocko@kernel.org>
On 06/08/2017 09:45 AM, Michal Hocko wrote:
> From: Michal Hocko <mhocko@suse.com>
>
> new_node_page tries to allocate the target page on a different NUMA node
> than the source page. This makes sense in most cases during the hotplug
> because we are likely to offline the whole numa node. But there are
> cases where there are no other nodes to fallback (e.g. when offlining
> parts of the only existing node) and we have to fallback to allocating
> from the source node. The current code does that but it can be
> simplified by checking the nmask and updating it before we even try to
> allocate rather than special casing it.
>
> This patch shouldn't introduce any functional change.
>
> Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
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next prev parent reply other threads:[~2017-06-08 8:15 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-08 7:45 [PATCH 0/4] more sensible hugetlb migration for hotplug/CMA Michal Hocko
2017-06-08 7:45 ` [PATCH 1/4] mm, memory_hotplug: simplify empty node mask handling in new_node_page Michal Hocko
2017-06-08 8:15 ` Vlastimil Babka [this message]
2017-06-08 7:45 ` [PATCH 2/4] hugetlb, memory_hotplug: prefer to use reserved pages for migration Michal Hocko
2017-06-08 8:22 ` Vlastimil Babka
2017-06-08 7:45 ` [PATCH 3/4] mm: unify new_node_page and alloc_migrate_target Michal Hocko
2017-06-08 8:36 ` Vlastimil Babka
2017-06-08 8:40 ` Michal Hocko
2017-06-08 7:45 ` [RFC PATCH 4/4] hugetlb: add support for preferred node to alloc_huge_page_nodemask Michal Hocko
2017-06-08 8:38 ` Vlastimil Babka
2017-06-12 9:06 ` Michal Hocko
2017-06-12 11:48 ` Michal Hocko
2017-06-12 11:53 ` Vlastimil Babka
2017-06-12 12:20 ` Michal Hocko
2017-06-12 15:21 ` Michal Hocko
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