linux-kernel - Re: [PATCH 1/1 FYI] tools headers UAPI: Sync linux/perf

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Date:   Wed, 26 Oct 2022 08:54:55 +0530
From:   Ravi Bangoria <ravi.bangoria@....com>
To:     arnaldo.melo@...il.com, acme@...hat.com
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Ian Rogers <irogers@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ravi Bangoria <ravi.bangoria@....com>
Subject: Re: [PATCH 1/1 FYI] tools headers UAPI: Sync linux/perf_event.h with
 the kernel sources

Hi Arnaldo,

On 26-Oct-22 1:34 AM, arnaldo.melo@...il.com wrote:
> To pick the changes in:
> 
>   cfef80bad4cf79cd ("perf/uapi: Define PERF_MEM_SNOOPX_PEER in kernel header file")
>   ee3e88dfec23153d ("perf/mem: Introduce PERF_MEM_LVLNUM_{EXTN_MEM|IO}")
>   b4e12b2d70fd9ecc ("perf: Kill __PERF_SAMPLE_CALLCHAIN_EARLY")
> 
> A previous sync:
> 
>   b7ddd38ccc723f0d ("tools headers UAPI: Sync include/uapi/linux/perf_event.h header with the kernel")
> 
> brought a PERF_MEM_LVLNUM_CXL, and used it in
> tools/perf/util/mem-events.c, but when the feature really hit the kernel
> that define had been renamed to PERF_MEM_LVLNUM_EXTN_MEM, so reflect
> that on the tooling side.

It's other way around. I proposed PERF_MEM_LVLNUM_EXTN_MEM but it was
vague and thus we replaced it with PERF_MEM_LVLNUM_CXL. So tool side
file is correct and kernel header needs to be fixed:

https://lore.kernel.org/lkml/f6268268-b4e9-9ed6-0453-65792644d953@amd.com

Thanks,
Ravi