From: Robert Richter <rric@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Viresh Kumar <viresh.kumar@linaro.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>,
Arnd Bergmann <arnd@kernel.org>,
oprofile-list@lists.sf.net, William Cohen <wcohen@redhat.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
anmar.oueja@linaro.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 00/18] drivers: Remove oprofile and dcookies
Date: Thu, 14 Jan 2021 22:50:41 +0100 [thread overview]
Message-ID: <YAC8sf6v8+QAXHD3@rric.localdomain> (raw)
In-Reply-To: <cover.1610622251.git.viresh.kumar@linaro.org>
On 14.01.21 17:04:24, Viresh Kumar wrote:
> Hello,
>
> The "oprofile" user-space tools don't use the kernel OPROFILE support
> any more, and haven't in a long time. User-space has been converted to
> the perf interfaces.
>
> Remove oprofile and dcookies (whose only user is oprofile) support from
> the kernel.
>
> This was suggested here [1] earlier.
>
> This is build/boot tested by kernel test robot (Intel) and Linaro's
> Tuxmake[2] for a lot of architectures and no failures were reported.
>
> --
> Viresh
>
> [1] https://lore.kernel.org/lkml/CAHk-=whw9t3ZtV8iA2SJWYQS1VOJuS14P_qhj3v5-9PCBmGQww@mail.gmail.com/
> [2] https://lwn.net/Articles/841624/
>
> Viresh Kumar (18):
> arch: alpha: Remove CONFIG_OPROFILE support
> arch: arm: Remove CONFIG_OPROFILE support
> arch: arc: Remove CONFIG_OPROFILE support
> arch: hexagon: Don't select HAVE_OPROFILE
> arch: ia64: Remove CONFIG_OPROFILE support
> arch: ia64: Remove rest of perfmon support
> arch: microblaze: Remove CONFIG_OPROFILE support
> arch: mips: Remove CONFIG_OPROFILE support
> arch: parisc: Remove CONFIG_OPROFILE support
> arch: powerpc: Stop building and using oprofile
> arch: powerpc: Remove oprofile
> arch: s390: Remove CONFIG_OPROFILE support
> arch: sh: Remove CONFIG_OPROFILE support
> arch: sparc: Remove CONFIG_OPROFILE support
> arch: x86: Remove CONFIG_OPROFILE support
> arch: xtensa: Remove CONFIG_OPROFILE support
> drivers: Remove CONFIG_OPROFILE support
> fs: Remove dcookies support
After oprofile userland moved to version 1.x, the kernel support for
it isn't needed anymore. The switch was back in 2014 when oprofile
started using the perf syscall:
https://sourceforge.net/p/oprofile/oprofile/ci/ba9edea2bdfe2c9475749fc83105632bd916b96c
Since then I haven't received any significant patches to implement new
features or add support for newer platforms in the kernel. There
haven't been bug reports sent or questions asked on the mailing list
for quite a while, which indicates there are no or less users. Users
(if any) should switch to oprofile 1.x or the perf tool. No need to
carry kernel support any longer with us.
So time to get rid of it. For the whole series:
Acked-by: Robert Richter <rric@kernel.org>
next prev parent reply other threads:[~2021-01-14 21:51 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-14 11:34 [PATCH 00/18] drivers: Remove oprofile and dcookies Viresh Kumar
2021-01-14 11:35 ` [PATCH 01/18] arch: alpha: Remove CONFIG_OPROFILE support Viresh Kumar
2021-01-14 11:35 ` [PATCH 02/18] arch: arm: " Viresh Kumar
2021-01-14 11:35 ` [PATCH 03/18] arch: arc: " Viresh Kumar
2021-01-14 17:51 ` Vineet Gupta
2021-01-15 3:34 ` Viresh Kumar
2021-01-14 11:35 ` [PATCH 04/18] arch: hexagon: Don't select HAVE_OPROFILE Viresh Kumar
2021-01-15 15:30 ` Brian Cain
2021-01-14 11:35 ` [PATCH 05/18] arch: ia64: Remove CONFIG_OPROFILE support Viresh Kumar
2021-01-14 11:35 ` [PATCH 06/18] arch: ia64: Remove rest of perfmon support Viresh Kumar
2021-01-14 11:35 ` [PATCH 07/18] arch: microblaze: Remove CONFIG_OPROFILE support Viresh Kumar
2021-01-14 12:12 ` Michal Simek
2021-01-14 11:35 ` [PATCH 08/18] arch: mips: " Viresh Kumar
2021-01-14 11:35 ` [PATCH 09/18] arch: parisc: " Viresh Kumar
2021-01-14 11:35 ` [PATCH 10/18] arch: powerpc: Stop building and using oprofile Viresh Kumar
2021-01-15 4:13 ` Viresh Kumar
2021-01-18 4:47 ` Viresh Kumar
2021-01-14 11:35 ` [PATCH 11/18] arch: powerpc: Remove oprofile Viresh Kumar
2021-01-14 11:35 ` [PATCH 12/18] arch: s390: Remove CONFIG_OPROFILE support Viresh Kumar
2021-01-15 10:35 ` Heiko Carstens
2021-01-14 11:35 ` [PATCH 13/18] arch: sh: " Viresh Kumar
2021-01-14 11:35 ` [PATCH 14/18] arch: sparc: " Viresh Kumar
2021-01-14 11:35 ` [PATCH 15/18] arch: x86: " Viresh Kumar
2021-01-14 11:35 ` [PATCH 16/18] arch: xtensa: " Viresh Kumar
2021-01-14 20:37 ` Max Filippov
2021-01-14 11:35 ` [PATCH 17/18] drivers: " Viresh Kumar
2021-01-14 15:06 ` Paul E. McKenney
2021-01-15 17:10 ` Federico Vaga
2021-01-14 11:35 ` [PATCH 18/18] fs: Remove dcookies support Viresh Kumar
2021-01-14 21:50 ` Robert Richter [this message]
2021-01-15 15:44 ` [PATCH 00/18] drivers: Remove oprofile and dcookies William Cohen
2021-01-15 4:27 ` Viresh Kumar
[not found] ` <CAHk-=whaPiPCM6erqqe5Q-Ugn7u-jY6w7iA-kEBBc8aB40sBoA@mail.gmail.com>
2021-01-18 6:57 ` Viresh Kumar
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