From: William Cohen <wcohen@redhat.com>
To: Robert Richter <rric@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Viresh Kumar <viresh.kumar@linaro.org>
Cc: Arnd Bergmann <arnd@kernel.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
linux-kernel@vger.kernel.org, anmar.oueja@linaro.org,
oprofile-list@lists.sf.net,
Alexander Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH 00/18] drivers: Remove oprofile and dcookies
Date: Fri, 15 Jan 2021 10:44:28 -0500 [thread overview]
Message-ID: <927ed742-914c-bbc2-d397-dabaaa6643e7@redhat.com> (raw)
In-Reply-To: <YAC8sf6v8+QAXHD3@rric.localdomain>
On 1/14/21 4:50 PM, Robert Richter wrote:
> 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>
The oprofile daemon that used the older oprofile kernel support was removed before OProfile 1.0 release by the following commit in August 2014:
https://sourceforge.net/p/oprofile/oprofile/ci/0c142c3a096d3e9ec42cc9b0ddad994fea60d135
At this point it makes sense to clean up the kernel and remove this unused code.
Acked-by: William Cohen <wcohen@redhat.com>
>
>
> _______________________________________________
> oprofile-list mailing list
> oprofile-list@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/oprofile-list
>
next prev parent reply other threads:[~2021-01-15 15:46 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-14 11:34 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 ` [PATCH 00/18] drivers: Remove oprofile and dcookies Robert Richter
2021-01-15 15:44 ` William Cohen [this message]
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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