| commit | e14808b49f55e0e1135da5e4a154a540dd9f3662 | |
| author | Mel Gorman <mgorman@suse.de> | |
| Mon, 19 Nov 2012 10:59:15 +0000 (19 10:59 +0000) | ||
| committer | Mel Gorman <mgorman@suse.de> | |
| Tue, 11 Dec 2012 14:42:51 +0000 (11 14:42 +0000) | ||
| tree | d66708455dcc1b6e2e15937d732ab12c121e623a | treesnapshot (tar.gz zip) |
| parent | a8f6077213d285ca08dbf6d4a67470787388138b | commitdiff |
mm: numa: Rate limit setting of pte_numa if node is saturated
If there are a large number of NUMA hinting faults and all of them
are resulting in migrations it may indicate that memory is just
bouncing uselessly around. NUMA balancing cost is likely exceeding
any benefit from locality. Rate limit the PTE updates if the node
is migration rate-limited. As noted in the comments, this distorts
the NUMA faulting statistics.
Signed-off-by: Mel Gorman <mgorman@suse.de>
If there are a large number of NUMA hinting faults and all of them
are resulting in migrations it may indicate that memory is just
bouncing uselessly around. NUMA balancing cost is likely exceeding
any benefit from locality. Rate limit the PTE updates if the node
is migration rate-limited. As noted in the comments, this distorts
the NUMA faulting statistics.
Signed-off-by: Mel Gorman <mgorman@suse.de>
| include/linux/migrate.h | diffblobblamehistory | |
| kernel/sched/fair.c | diffblobblamehistory | |
| mm/migrate.c | diffblobblamehistory |