【轉】怎麼在RHEL8中改變HugePage Size？

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How to change the default HugePage size in Red Hat Enterprise Linux 8?

SOLUTION 已驗證 - 已更新 2019年二月24日21:52 - 

English 

環境

• Red Hat Enterprise Linux 8
• HugePage

問題

• How to change the default HugePage size in Red Hat Enterprise Linux 8?
• How to change the default HugePage size to 1GB on X86-64 platform?

決議

• The kernel boot parameter 

  default_hugepagesz

   is used to set the size of the default HugeTLB page.
• Set 

  default_hugepagesz=1G

   in 

  /boot/grub2/grubenv

   file to change the default HugePage size to 1GB on X86-64 platform.

Raw

# grep kernelopts /boot/grub2/grubenv
kernelopts=root=/dev/mapper/rhel-root ro resume=/dev/mapper/rhel-swap rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet default_hugepagesz=1G
           

• Reboot the system for changes to take effect.

Raw

# reboot
           

• Verify the default HugePage size using the following commands.

Raw

# grep Hugepagesize: /proc/meminfo 
Hugepagesize:    1048576 kB

# hugeadm --pool-list
      Size  Minimum  Current  Maximum  Default
1073741824        0        0        0        *