大页hugepages

0xc0000000
0x40000000
0x200000
0x1000

cpu  flags   pse   pdpe1gb
内核config    CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
文件系统挂载
[root@localhost /]# cat proc/mounts
rootfs / rootfs rw 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
devtmpfs /dev devtmpfs rw,nosuid,size=64814456k,nr_inodes=16203614,mode=755 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,nosuid,nodev,mode=755 0 0
tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup rw,nosuid,nodev,noexec,relatime,net_cls,net_prio 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
configfs /sys/kernel/config configfs rw,relatime 0 0
/dev/mapper/linux-system--A / ext4 rw,relatime,data=ordered 0 0
systemd-1 /proc/sys/fs/binfmt_misc autofs rw,relatime,fd=30,pgrp=1,timeout=300,minproto=5,maxproto=5,direct 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
mqueue /dev/mqueue mqueue rw,relatime 0 0
hugetlbfs /dev/hugepages hugetlbfs rw,relatime 0 0
tmpfs /tmp tmpfs rw 0 0
/dev/sda1 /boot ext4 rw,relatime,data=ordered 0 0
/dev/sda6 /config ext4 rw,relatime,data=ordered 0 0
/dev/sda7 /disk/disk_system ext4 rw,relatime,data=ordered 0 0
tmpfs /run/user/0 tmpfs rw,nosuid,nodev,relatime,size=13181628k,mode=700 0 0
[root@localhost /]#

配置：
[root@localhost /]# cat proc/meminfo
MemTotal:       131816268 kB
MemFree:        33839832 kB
MemAvailable:   101533052 kB
Buffers:          123092 kB
Cached:         67695852 kB
SwapCached:         3388 kB
Active:         26594384 kB
Inactive:       68007936 kB
Active(anon):   26426308 kB
Inactive(anon):   357576 kB
Active(file):     168076 kB
Inactive(file): 67650360 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:      16777212 kB
SwapFree:       16729944 kB
Dirty:               116 kB
Writeback:             0 kB
AnonPages:      26780564 kB
Mapped:            79984 kB
Shmem:               472 kB
Slab:             300160 kB
SReclaimable:     200060 kB
SUnreclaim:       100100 kB
KernelStack:       17984 kB
PageTables:        63752 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    81636768 kB
Committed_AS:   41067244 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      568740 kB
VmallocChunk:   34290890804 kB
HardwareCorrupted:     0 kB
AnonHugePages:  26034176 kB
HugePages_Total:       2
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:    1048576 kB
DirectMap4k:      298488 kB
DirectMap2M:    56035328 kB
DirectMap1G:    79691776 kB
[root@localhost /]#
设置
sysctl直接执行
sysctl配置文件
grub配置文件

qemu使用
-m    -mem-path /dev/hugepage -prealloc

注意，分的不能大于总的，物理虚拟一样