如何在ubuntu上默认启用透明的大页面？

Question

如何在ubuntu上默认启用透明大页面？

$ uname -a
Linux yoda 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:13:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

~$ cd /sys/kernel/mm/transparent_hugepage/

/sys/kernel/mm/transparent_hugepage$ ls
defrag  enabled  khugepaged

/sys/kernel/mm/transparent_hugepage$ cat enabled 
always [madvise] never

/sys/kernel/mm/transparent_hugepage$ sudo echo always > enabled 
-bash: enabled: Permission denied

/sys/kernel/mm/transparent_hugepage$ sudo ls
[sudo] password for <...>: 
defrag  enabled  khugepaged

/sys/kernel/mm/transparent_hugepage$ sudo ls
defrag  enabled  khugepaged

/sys/kernel/mm/transparent_hugepage$ sudo echo always > enabled 
-bash: enabled: Permission denied

/sys/kernel/mm/transparent_hugepage$ cat enabled 
always [madvise] never

Answer 1

添加以下内容：

transparent_hugepage=always

到你的GRUB_CMDLINE_LINUX_DEFAULT：

/etc/default/grub

并做了一个：

update-grub

应该这样做。

Answer 2

sudo su
password: [....]
echo always > /sys/kernel/mm/transparent_hugepage/enabled 

Answer 3

将此添加到您的/etc/rc.local：

echo always > /sys/kernel/mm/transparent_hugepage/enabled