forked from luck/tmp_suning_uos_patched
56608209d3
I noticed /proc/sys/vm/zone_reclaim_mode was 0 on a ppc64 NUMA box. It gets enabled via this: /* * If another node is sufficiently far away then it is better * to reclaim pages in a zone before going off node. */ if (distance > RECLAIM_DISTANCE) zone_reclaim_mode = 1; Since we use the default value of 20 for REMOTE_DISTANCE and 20 for RECLAIM_DISTANCE it never kicks in. The local to remote bandwidth ratios can be quite large on System p machines so it makes sense for us to reclaim clean pagecache locally before going off node. The patch below sets a smaller value for RECLAIM_DISTANCE and thus enables zone reclaim. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> |
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boot | ||
configs | ||
include/asm | ||
kernel | ||
kvm | ||
lib | ||
math-emu | ||
mm | ||
oprofile | ||
platforms | ||
sysdev | ||
xmon | ||
Kconfig | ||
Kconfig.debug | ||
Makefile | ||
relocs_check.pl |