Messages in this thread | | | Date | Thu, 9 Nov 2017 07:53:31 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH x86/urgent] bpf: emulate push insns for uprobe on x86 |
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On Wed, 8 Nov 2017, Yonghong Song wrote: > On 11/8/17 4:06 PM, David Miller wrote: > > From: Yonghong Song <yhs@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
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