Messages in this thread | | | Subject | Re: [PATCH] sched/numa: Avoid trapping faults and attempting migration of file-backed dirty pages | From | Rik van Riel <> | Date | Mon, 26 Mar 2018 17:59:24 -0400 |
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On Mon, 2018-03-26 at 10:43 +0100, Mel Gorman wrote: > change_pte_range is called from task work context to mark PTEs for > receiving > NUMA faulting hints. If the marked pages are dirty then migration may > fail. > Some filesystems cannot migrate dirty pages without blocking so are > skipped > in MIGRATE_ASYNC mode which just wastes CPU. Even when they can, it > can > be a waste of cycles when the pages are shared forcing higher scan > rates.
> Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reviewed-by: Rik van Riel <riel@surriel.com>
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