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From:   Alexei Starovoitov <alexei.starovoitov@gmail.com>
Date:   Wed, 1 Sep 2021 08:23:38 -0700
Message-ID: <CAADnVQK6kLef54iCufsJay0SnsTLk1Ta-RmnhZnGk7TqJCWUJQ@mail.gmail.com>
Subject: Re: [PATCH 0/8] x86/ftrace: Add direct batch interface
To:     Jiri Olsa <jolsa@redhat.com>
Cc:     "Steven Rostedt (VMware)" <rostedt@goodmis.org>,
        bpf <bpf@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andriin@fb.com>
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On Tue, Aug 31, 2021 at 2:50 AM Jiri Olsa <jolsa@redhat.com> wrote:
>
> hi,
> adding interface to maintain multiple direct functions
> within single calls. It's a base for follow up bpf batch
> attach functionality.
>
> New interface:
>
>   int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr)
>   int unregister_ftrace_direct_multi(struct ftrace_ops *ops)
>   int modify_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr)
>
> that allows to register/unregister/modify direct function 'addr'
> with struct ftrace_ops object. The ops filter can be updated
> before with ftrace_set_filter_ip calls
>
>   1) patches (1-4) that fix the ftrace graph tracing over the function
>      with direct trampolines attached
>   2) patches (5-8) that add batch interface for ftrace direct function
>      register/unregister/modify
>
> Also available at (based on Steven's ftrace/core branch):
>   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
>   ftrace/direct

Steven,

Could you review and merge this set for this merge window,
so we can process related bpf bits for the next cycle?