Re: [PATCH 16/27] mm: Move page mapped accounting to the node
From: Mel Gorman <hidden>
Date: 2016-06-23 08:35:08
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On Tue, Jun 21, 2016 at 03:32:06PM -0700, Andrew Morton wrote:
On Tue, 21 Jun 2016 15:15:55 +0100 Mel Gorman [off-list ref] wrote:quoted
Reclaim makes decisions based on the number of pages that are mapped but it's mixing node and zone information. Account NR_FILE_MAPPED and NR_ANON_PAGES pages on the node.<wading through rejects> Boy, the difference between __mod_zone_page_state(page_zone(page), ... and __mod_node_page_state(page_pgdat(page), ... is looking subtle. When and why to use one versus the other. I'm not seeing any explanation of this in there but haven't yet looked hard.
I'm not sure I see the problem. One applies for zone stats and the other is for node. Granted, care is needed to use the correct one or a random stat is updated instead of the one intended. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>