有没有一种方法可以将kptr_restrict设置为0? [英] Is there a way to set kptr_restrict to 0?

问题描述

我目前在运行linux perf时遇到问题，主要是因为/proc/sys/kernel/kptr_restrict当前设置为1.

I am currently having trouble running linux perf, mostly because /proc/sys/kernel/kptr_restrict is currently set to 1.

但是，如果我尝试通过如下方式将0回显到/proc/sys/kernel/kptr_restrict ...

However, if I try to /proc/sys/kernel/kptr_restrict by echoing 0 to it as follows...

echo 0 > /proc/sys/kernel/kptr_restrict

我收到一个权限被拒绝的错误.我也不认为可以更改其权限.

I get a permission denied error. I don't think I can change permissions on it either.

是否可以通过某种方式直接设置此设置?我是超级用户.我认为，如果不设置此功能，性能将无法令人满意.

Is there a way to set this directly somehow? I am super user. I don't think perf will function acceptably without this being set.

推荐答案

在您的示例中，echo以root身份运行，但您的shell却以您的身份运行.

In your example, echo is running as root, but your shell is running as you.

因此，请尝试以下命令:

So please try this command:

sudo sh -c " echo 0 > /proc/sys/kernel/kptr_restrict"

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