On Wed, 8 Nov 2017, Yonghong Song wrote:
> On 11/8/17 4:06 PM, David Miller wrote:
> > From: Yonghong Song <y...@fb.com>
> > 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.
The proper subject is something like:
[PATCH] uprobes/x86: .......
which you can figure out by looking at the subsystem prefixes via
git log arch/x86/kernel/uprobes.c
Note, that it says [PATCH} and nothing else. That patch is a nice
performance improvement, but certainly not x86/urgent material. x86/urgent
is for bug and regression fixes.
Thanks,
tglx
