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SubjectRe: [PATCH 10/63] mm: Do not flush TLB during protection change if !pte_present && !migration_entry
On 10/07/2013 06:28 AM, Mel Gorman wrote:
> NUMA PTE scanning is expensive both in terms of the scanning itself and
> the TLB flush if there are any updates. Currently non-present PTEs are
> accounted for as an update and incurring a TLB flush where it is only
> necessary for anonymous migration entries. This patch addresses the
> problem and should reduce TLB flushes.
>
> Signed-off-by: Mel Gorman <mgorman@suse.de>

Reviewed-by: Rik van Riel <riel@redhat.com>

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