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Date:   Tue, 12 Jan 2021 10:19:37 +0100
From:   Jiri Olsa <>
To:     Alexei Starovoitov <>
Cc:     Jiri Olsa <>,
        Arnaldo Carvalho de Melo <>,
        lkml <>,
        Peter Zijlstra <>,
        Ingo Molnar <>,
        Mark Rutland <>,
        Namhyung Kim <>,
        Alexander Shishkin <>,
        Michael Petlan <>,
        Song Liu <>,
        Ian Rogers <>,
        Stephane Eranian <>,
        Alexei Budankov <>,
        Andi Kleen <>,
        Adrian Hunter <>
Subject: Re: [PATCHv6 0/4] perf: Add mmap2 build id support

On Mon, Jan 11, 2021 at 06:49:58PM -0800, Alexei Starovoitov wrote:
> On Mon, Jan 11, 2021 at 10:38:19PM +0100, Jiri Olsa wrote:
> > hi,
> > adding the support to have buildid stored in mmap2 event,
> > so we can bypass the final perf record hunt on build ids.
> > 
> > This patchset allows perf to record build ID in mmap2 event,
> > and adds perf tooling to store/download binaries to .debug
> > cache based on these build IDs.
> > 
> > Note that the build id retrieval code is stolen from bpf
> > code, where it's been used (together with file offsets)
> > to replace IPs in user space stack traces. It's now added
> > under lib directory.
> > 
> > v6 changes:
> >   - last 4 patches rebased Arnaldo's perf/core
> There were no issues with v5 as far as I can remember.
> This is just a resubmit to get it landed ?

yes, exactly

> Last time we couldn't quite figure out which tree to go through.
> I think the recommend path was to go via bpf-next.
> Is it still the case?

bpf-next would be best for kernel changes,
  perf: Add build id data in mmap2 event
  bpf: Add size arg to build_id_parse function
  bpf: Move stack_map_get_build_id into lib

the 'perf buildid-cache' change needs to go through Arnaldo's tree,
because it depends on changes he already pulled in


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