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Date:   Wed, 29 Jul 2020 13:27:32 -0300
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Subject: Re: Should perf version match kernel version?
To:     peterz@infradead.org, Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        linux-kernel@vger.kernel.org, "Dmitry V. Levin" <ldv@altlinux.org>
From:   Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Message-ID: <7CEC30D2-0C1E-4E88-A1D2-35C121EB1013@gmail.com>
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On July 29, 2020 1:02:20 PM GMT-03:00, peterz@infradead=2Eorg wrote:
>On Wed, Jul 29, 2020 at 06:56:47PM +0300, Vitaly Chikunov wrote:
>> Hi,
>>=20
>> It seems that most distros try to have perf version to match with
>> running kernel version=2E Is is requirement? Would it be better to have
>> single perf from kernel mainline to work with any (older) kernel
>> version?
>>=20
>> We have different kernel versions in ALT Linux (stable for 4=2E19, 5=2E=
4,
>> and 5=2E7) and I want to understand if we should have three perfs or
>> single package will be enough=2E
>
>We strive to have it all compatible, older perf should work on newer
>kernel and newer perf should work on older kernel=2E
>
>How well it's all tested is another=2E
>
>Personally I often use a very old perf=2E

Yeah, never was a requirement, if you find some problem using a new perf o=
n an old kernel or the other way around, please report=2E

- Arnaldo

--=20
Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E