From: Fang Lijun <fanglijun3@huawei.com> ascend inclusion category: Bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4JMLR CVE: NA -------------- Enable COHERENT_DEVICE will degrade performance, Hackbench test time (Pipe_Process_Number=800) from 0.3 to 1.8. When the cdmmask was cacheline aligned, it will be improved as same as disabled COHERENT_DEVICE. Signed-off-by: Fang Lijun <fanglijun3@huawei.com> Reviewed-by: Weilong Chen <chenweilong@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- arch/arm64/mm/numa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c index b2260bb53691..9a2e29a3a597 100644 --- a/arch/arm64/mm/numa.c +++ b/arch/arm64/mm/numa.c @@ -26,7 +26,7 @@ static u8 *numa_distance; bool numa_off; #ifdef CONFIG_COHERENT_DEVICE -nodemask_t cdmmask; +nodemask_t __cacheline_aligned cdmmask; inline int arch_check_node_cdm(int nid) { -- 2.20.1