Messages in this thread | | | Date | Mon, 07 Oct 2013 13:10:23 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH 12/63] mm: numa: Do not migrate or account for hinting faults on the zero page |
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On 10/07/2013 06:28 AM, Mel Gorman wrote: > The zero page is not replicated between nodes and is often shared between > processes. The data is read-only and likely to be cached in local CPUs > if heavily accessed meaning that the remote memory access cost is less > of a concern. This patch prevents trapping faults on the zero pages. For > tasks using the zero page this will reduce the number of PTE updates, > TLB flushes and hinting faults. > > [peterz@infradead.org: Correct use of is_huge_zero_page] > Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
-- All rights reversed
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