linux 设置内存大页

方法一：

[root@localhost ~]# 
[root@localhost ~]# cat /proc/meminfo |grep Huge
AnonHugePages:         0 kB
ShmemHugePages:        0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:      32768 kB
Hugetlb:               0 kB
[root@localhost ~]# cat /sys/devices/system/node/node0/hugepages/hugepages-32768kB/nr_hugepages
0
[root@localhost ~]# 
[root@localhost ~]# echo 32 > /sys/devices/system/node/node0/hugepages/hugepages-32768kB/nr_hugepages
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# cat /sys/devices/system/node/node0/hugepages/hugepages-32768kB/nr_hugepages
32
[root@localhost ~]# cat /proc/meminfo |grep Huge
AnonHugePages:         0 kB
ShmemHugePages:        0 kB
HugePages_Total:      32
HugePages_Free:       32
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:      32768 kB
Hugetlb:         1048576 kB
[root@localhost ~]# 

方法二：

在linux cmdline 中，添加如下参数

default_hugepagesz=1G hugepagesz=1G hugepages=8