From: "Michal Suchánek" <msuchanek@suse.de>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Ben Dooks <ben.dooks@codethink.co.uk>,
Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Linux Doc Mailing List <linux-doc@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Miguel Ojeda <ojeda@kernel.org>, Will Deacon <will@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Joe Perches <joe@perches.com>, Paul Mackerras <paulus@samba.org>,
linux-riscv <linux-riscv@lists.infradead.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] Raise the minimum GCC version to 5.2
Date: Tue, 4 May 2021 14:17:13 +0200 [thread overview]
Message-ID: <20210504121713.GT6564@kitsune.suse.cz> (raw)
In-Reply-To: <CANiq72kHwAeQ+vhFqg9tiQA-QHEK_xvP_Sro-_c5LJ2XDzjzxQ@mail.gmail.com>
On Tue, May 04, 2021 at 02:09:24PM +0200, Miguel Ojeda wrote:
> On Tue, May 4, 2021 at 11:22 AM Michal Suchánek <msuchanek@suse.de> wrote:
> >
> > Except it makes answering the question "Is this bug we see on this
> > ancient system still present in upstream?" needlessly more difficult to
> > answer.
>
> Can you please provide some details? If you are talking about testing
> a new kernel image in the ancient system "as-is", why wouldn't you
> build it in a newer system? If you are talking about particular
> problems about bisecting (kernel, compiler) pairs etc., details would
> also be welcome.
Yes, bisecting comes to mind. If you need to switch the userspace as
well the bisection results are not that solid. You may not be even able
to bisect because the workload does not exist on a new system at all.
Crafting a minimal test case that can be forward-ported to a new system
is not always trivial - if you understood the problem to that extent you
might not even need to bisect it in the first place.
Thanks
Michal
WARNING: multiple messages have this Message-ID (diff)
From: "Michal Suchánek" <msuchanek@suse.de>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Ben Dooks <ben.dooks@codethink.co.uk>,
Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Linux Doc Mailing List <linux-doc@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Miguel Ojeda <ojeda@kernel.org>, Will Deacon <will@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Joe Perches <joe@perches.com>, Paul Mackerras <paulus@samba.org>,
linux-riscv <linux-riscv@lists.infradead.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] Raise the minimum GCC version to 5.2
Date: Tue, 4 May 2021 14:17:13 +0200 [thread overview]
Message-ID: <20210504121713.GT6564@kitsune.suse.cz> (raw)
In-Reply-To: <CANiq72kHwAeQ+vhFqg9tiQA-QHEK_xvP_Sro-_c5LJ2XDzjzxQ@mail.gmail.com>
On Tue, May 04, 2021 at 02:09:24PM +0200, Miguel Ojeda wrote:
> On Tue, May 4, 2021 at 11:22 AM Michal Suchánek <msuchanek@suse.de> wrote:
> >
> > Except it makes answering the question "Is this bug we see on this
> > ancient system still present in upstream?" needlessly more difficult to
> > answer.
>
> Can you please provide some details? If you are talking about testing
> a new kernel image in the ancient system "as-is", why wouldn't you
> build it in a newer system? If you are talking about particular
> problems about bisecting (kernel, compiler) pairs etc., details would
> also be welcome.
Yes, bisecting comes to mind. If you need to switch the userspace as
well the bisection results are not that solid. You may not be even able
to bisect because the workload does not exist on a new system at all.
Crafting a minimal test case that can be forward-ported to a new system
is not always trivial - if you understood the problem to that extent you
might not even need to bisect it in the first place.
Thanks
Michal
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
WARNING: multiple messages have this Message-ID (diff)
From: "Michal Suchánek" <msuchanek@suse.de>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>,
Catalin Marinas <catalin.marinas@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Linux Doc Mailing List <linux-doc@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Joe Perches <joe@perches.com>,
Ben Dooks <ben.dooks@codethink.co.uk>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Miguel Ojeda <ojeda@kernel.org>,
Paul Mackerras <paulus@samba.org>,
linux-riscv <linux-riscv@lists.infradead.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Will Deacon <will@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] Raise the minimum GCC version to 5.2
Date: Tue, 4 May 2021 14:17:13 +0200 [thread overview]
Message-ID: <20210504121713.GT6564@kitsune.suse.cz> (raw)
In-Reply-To: <CANiq72kHwAeQ+vhFqg9tiQA-QHEK_xvP_Sro-_c5LJ2XDzjzxQ@mail.gmail.com>
On Tue, May 04, 2021 at 02:09:24PM +0200, Miguel Ojeda wrote:
> On Tue, May 4, 2021 at 11:22 AM Michal Suchánek <msuchanek@suse.de> wrote:
> >
> > Except it makes answering the question "Is this bug we see on this
> > ancient system still present in upstream?" needlessly more difficult to
> > answer.
>
> Can you please provide some details? If you are talking about testing
> a new kernel image in the ancient system "as-is", why wouldn't you
> build it in a newer system? If you are talking about particular
> problems about bisecting (kernel, compiler) pairs etc., details would
> also be welcome.
Yes, bisecting comes to mind. If you need to switch the userspace as
well the bisection results are not that solid. You may not be even able
to bisect because the workload does not exist on a new system at all.
Crafting a minimal test case that can be forward-ported to a new system
is not always trivial - if you understood the problem to that extent you
might not even need to bisect it in the first place.
Thanks
Michal
WARNING: multiple messages have this Message-ID (diff)
From: "Michal Suchánek" <msuchanek@suse.de>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Ben Dooks <ben.dooks@codethink.co.uk>,
Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Linux Doc Mailing List <linux-doc@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Miguel Ojeda <ojeda@kernel.org>, Will Deacon <will@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Joe Perches <joe@perches.com>, Paul Mackerras <paulus@samba.org>,
linux-riscv <linux-riscv@lists.infradead.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] Raise the minimum GCC version to 5.2
Date: Tue, 4 May 2021 14:17:13 +0200 [thread overview]
Message-ID: <20210504121713.GT6564@kitsune.suse.cz> (raw)
In-Reply-To: <CANiq72kHwAeQ+vhFqg9tiQA-QHEK_xvP_Sro-_c5LJ2XDzjzxQ@mail.gmail.com>
On Tue, May 04, 2021 at 02:09:24PM +0200, Miguel Ojeda wrote:
> On Tue, May 4, 2021 at 11:22 AM Michal Suchánek <msuchanek@suse.de> wrote:
> >
> > Except it makes answering the question "Is this bug we see on this
> > ancient system still present in upstream?" needlessly more difficult to
> > answer.
>
> Can you please provide some details? If you are talking about testing
> a new kernel image in the ancient system "as-is", why wouldn't you
> build it in a newer system? If you are talking about particular
> problems about bisecting (kernel, compiler) pairs etc., details would
> also be welcome.
Yes, bisecting comes to mind. If you need to switch the userspace as
well the bisection results are not that solid. You may not be even able
to bisect because the workload does not exist on a new system at all.
Crafting a minimal test case that can be forward-ported to a new system
is not always trivial - if you understood the problem to that extent you
might not even need to bisect it in the first place.
Thanks
Michal
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-05-04 12:17 UTC|newest]
Thread overview: 146+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-01 15:15 [PATCH] Raise the minimum GCC version to 5.2 Masahiro Yamada
2021-05-01 15:15 ` Masahiro Yamada
2021-05-01 15:15 ` Masahiro Yamada
2021-05-01 15:15 ` Masahiro Yamada
2021-05-01 15:52 ` Miguel Ojeda
2021-05-01 15:52 ` Miguel Ojeda
2021-05-01 15:52 ` Miguel Ojeda
2021-05-01 15:52 ` Miguel Ojeda
2021-05-01 17:38 ` Christophe Leroy
2021-05-01 17:38 ` Christophe Leroy
2021-05-01 17:38 ` Christophe Leroy
2021-05-01 17:38 ` Christophe Leroy
2021-05-02 2:41 ` Joe Perches
2021-05-02 2:41 ` Joe Perches
2021-05-02 2:41 ` Joe Perches
2021-05-02 2:41 ` Joe Perches
2021-05-02 18:30 ` Segher Boessenkool
2021-05-02 18:30 ` Segher Boessenkool
2021-05-02 18:30 ` Segher Boessenkool
2021-05-02 18:30 ` Segher Boessenkool
2021-05-02 20:00 ` Joe Perches
2021-05-02 20:00 ` Joe Perches
2021-05-02 20:00 ` Joe Perches
2021-05-02 20:00 ` Joe Perches
2021-05-02 20:32 ` Segher Boessenkool
2021-05-02 20:32 ` Segher Boessenkool
2021-05-02 20:32 ` Segher Boessenkool
2021-05-02 20:32 ` Segher Boessenkool
2021-05-02 21:05 ` Ali Kaasinen
2021-05-02 21:05 ` Ali Kaasinen
2021-05-02 21:05 ` Ali Kaasinen
2021-05-02 21:05 ` Ali Kaasinen
2021-05-02 21:08 ` Linus Torvalds
2021-05-02 21:08 ` Linus Torvalds
2021-05-02 21:08 ` Linus Torvalds
2021-05-02 21:08 ` Linus Torvalds
2021-05-02 22:30 ` Matthew Wilcox
2021-05-02 22:30 ` Matthew Wilcox
2021-05-02 22:30 ` Matthew Wilcox
2021-05-02 22:30 ` Matthew Wilcox
2021-05-03 7:34 ` Alexander Dahl
2021-05-03 7:34 ` Alexander Dahl
2021-05-03 7:34 ` Alexander Dahl
2021-05-03 7:34 ` Alexander Dahl
2021-05-03 8:54 ` Joe Perches
2021-05-03 8:54 ` Joe Perches
2021-05-03 8:54 ` Joe Perches
2021-05-03 8:54 ` Joe Perches
2021-05-03 9:25 ` Arnd Bergmann
2021-05-03 9:25 ` Arnd Bergmann
2021-05-03 9:25 ` Arnd Bergmann
2021-05-03 9:25 ` Arnd Bergmann
2021-05-03 12:20 ` David Laight
2021-05-03 12:20 ` David Laight
2021-05-03 12:20 ` David Laight
2021-05-03 13:10 ` Miguel Ojeda
2021-05-03 13:10 ` Miguel Ojeda
2021-05-03 13:10 ` Miguel Ojeda
2021-05-03 13:10 ` Miguel Ojeda
2021-05-04 5:30 ` Alexander Dahl
2021-05-04 5:30 ` Alexander Dahl
2021-05-04 5:30 ` Alexander Dahl
2021-05-04 5:30 ` Alexander Dahl
2021-05-04 6:33 ` Christophe Leroy
2021-05-04 6:33 ` Christophe Leroy
2021-05-04 6:33 ` Christophe Leroy
2021-05-04 12:07 ` Arnd Bergmann
2021-05-04 12:07 ` Arnd Bergmann
2021-05-04 12:07 ` Arnd Bergmann
2021-05-04 12:07 ` Arnd Bergmann
2021-05-04 13:25 ` Andy Shevchenko
2021-05-04 13:25 ` Andy Shevchenko
2021-05-04 13:25 ` Andy Shevchenko
2021-05-04 13:25 ` Andy Shevchenko
2021-05-03 11:35 ` Arnd Bergmann
2021-05-03 11:35 ` Arnd Bergmann
2021-05-03 11:35 ` Arnd Bergmann
2021-05-03 11:35 ` Arnd Bergmann
2021-05-03 9:49 ` Kirill A. Shutemov
2021-05-03 9:49 ` Kirill A. Shutemov
2021-05-03 9:49 ` Kirill A. Shutemov
2021-05-03 9:49 ` Kirill A. Shutemov
2021-05-02 21:23 ` Joe Perches
2021-05-02 21:23 ` Joe Perches
2021-05-02 21:23 ` Joe Perches
2021-05-02 21:23 ` Joe Perches
2021-05-03 0:44 ` Segher Boessenkool
2021-05-03 0:44 ` Segher Boessenkool
2021-05-03 0:44 ` Segher Boessenkool
2021-05-03 0:44 ` Segher Boessenkool
2021-05-03 9:57 ` Arnd Bergmann
2021-05-03 9:57 ` Arnd Bergmann
2021-05-03 9:57 ` Arnd Bergmann
2021-05-03 9:57 ` Arnd Bergmann
2021-05-04 7:56 ` Ben Dooks
2021-05-04 7:56 ` Ben Dooks
2021-05-04 7:56 ` Ben Dooks
2021-05-04 7:56 ` Ben Dooks
2021-05-04 8:38 ` Miguel Ojeda
2021-05-04 8:38 ` Miguel Ojeda
2021-05-04 8:38 ` Miguel Ojeda
2021-05-04 8:38 ` Miguel Ojeda
2021-05-04 9:22 ` Michal Suchánek
2021-05-04 9:22 ` Michal Suchánek
2021-05-04 9:22 ` Michal Suchánek
2021-05-04 9:22 ` Michal Suchánek
2021-05-04 12:09 ` Miguel Ojeda
2021-05-04 12:09 ` Miguel Ojeda
2021-05-04 12:09 ` Miguel Ojeda
2021-05-04 12:09 ` Miguel Ojeda
2021-05-04 12:17 ` Michal Suchánek [this message]
2021-05-04 12:17 ` Michal Suchánek
2021-05-04 12:17 ` Michal Suchánek
2021-05-04 12:17 ` Michal Suchánek
2021-05-04 12:26 ` Christophe Leroy
2021-05-04 12:26 ` Christophe Leroy
2021-05-04 12:26 ` Christophe Leroy
2021-05-04 12:26 ` Christophe Leroy
2021-05-02 18:37 ` Segher Boessenkool
2021-05-02 18:37 ` Segher Boessenkool
2021-05-02 18:37 ` Segher Boessenkool
2021-05-02 18:37 ` Segher Boessenkool
2021-05-03 6:16 ` Christophe Leroy
2021-05-03 6:16 ` Christophe Leroy
2021-05-03 6:16 ` Christophe Leroy
2021-05-03 6:16 ` Christophe Leroy
2021-05-04 2:13 ` Masahiro Yamada
2021-05-04 2:13 ` Masahiro Yamada
2021-05-04 2:13 ` Masahiro Yamada
2021-05-04 2:13 ` Masahiro Yamada
2021-05-04 13:18 ` Andy Shevchenko
2021-05-04 13:18 ` Andy Shevchenko
2021-05-04 13:18 ` Andy Shevchenko
2021-05-04 13:18 ` Andy Shevchenko
2021-05-03 12:27 ` David Sterba
2021-05-03 12:27 ` David Sterba
2021-05-03 12:27 ` David Sterba
2021-05-03 12:27 ` David Sterba
2021-05-15 7:14 ` Pavel Machek
2021-05-15 7:14 ` Pavel Machek
2021-05-15 7:14 ` Pavel Machek
2021-05-15 7:14 ` Pavel Machek
2021-05-15 7:27 ` Joe Perches
2021-05-15 7:27 ` Joe Perches
2021-05-15 7:27 ` Joe Perches
2021-05-15 7:27 ` Joe Perches
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