Re: [PATCH x86/urgent] bpf: emulate push insns for uprobe on x86

[Yonghong Song]

On 11/8/17 4:06 PM, David Miller wrote:
> From: Yonghong Song <yhs@xxxxxx>
> Date: Wed, 8 Nov 2017 13:37:12 -0800
>
> > Uprobe is a tracing mechanism for userspace programs.
> > Typical uprobe will incur overhead of two traps.
> > First trap is caused by replaced trap insn, and
> > the second trap is to execute the original displaced
> > insn in user space.
>   ...
>
> I don't understand how this is bpf related, and if it is you don't
> explain it well in the commit message.

Right. This is not related to bpf. Will remove the "bpf" from the 
subject line in the next revision.

> Thank you.