From: Dave Hansen <dave.hansen@intel.com>
To: David Rientjes <rientjes@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Bob Liu <bob.liu@oracle.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [patch] mm, thp: only collapse hugepages to nodes with affinity
Date: Mon, 14 Jul 2014 21:47:13 -0700 [thread overview]
Message-ID: <53C4B251.5000505@intel.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1407141807030.8808@chino.kir.corp.google.com>
On 07/14/2014 06:09 PM, David Rientjes wrote:
> + if (node == NUMA_NO_NODE) {
> + node = page_to_nid(page);
> + } else {
> + int distance = node_distance(page_to_nid(page), node);
> +
> + /*
> + * Do not migrate to memory that would not be reclaimed
> + * from.
> + */
> + if (distance > RECLAIM_DISTANCE)
> + goto out_unmap;
> + }
Isn't the reclaim behavior based on zone_reclaim_mode and not
RECLAIM_DISTANCE directly? And isn't that reclaim behavior disabled by
default?
I think you should at least be consulting zone_reclaim_mode.
next prev parent reply other threads:[~2014-07-15 4:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-15 1:09 [patch] mm, thp: only collapse hugepages to nodes with affinity David Rientjes
2014-07-15 4:47 ` Dave Hansen [this message]
2014-07-15 23:17 ` David Rientjes
2014-07-16 0:13 ` [patch v2] mm, tmp: only collapse hugepages to nodes with affinity for zone_reclaim_mode David Rientjes
2014-07-16 1:22 ` Bob Liu
2014-07-16 15:47 ` Vlastimil Babka
2014-07-16 19:37 ` Hugh Dickins
2014-07-17 0:49 ` David Rientjes
2014-07-16 15:38 ` Vlastimil Babka
2014-07-17 0:54 ` David Rientjes
2014-07-17 0:59 ` [patch v3] mm, thp: " David Rientjes
2014-07-17 16:28 ` Dave Hansen
2014-07-17 21:48 ` [patch v4] " David Rientjes
2014-07-25 15:34 ` Mel Gorman
2014-07-28 8:42 ` [patch v3] " Vlastimil Babka
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