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| From | Vincent Blut <vincent.debian@free.fr> |
| Newsgroups | linux.debian.kernel |
| Subject | Re: CONFIG_PREEMPT_DYNAMIC=y? |
| Date | Tue, 10 Oct 2023 14:20:01 +0200 |
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| X-Original-Cc | debian-kernel@lists.debian.org, Johannes Schauer Marin Rodrigues <josch@debian.org>, Emanuele Rocca <ema@debian.org>, Ben Hutchings <ben@decadent.org.uk> |
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Hi,
Le 2023-10-10 13:54, Diederik de Haas a écrit :
> On Tuesday, 10 October 2023 12:10:07 CEST Emanuele Rocca wrote:
> > CONFIG_PREEMPT_DYNAMIC is set to 'y' by default on amd64 due to
> > HAVE_PREEMPT_DYNAMIC_CALL being 'y', see:
> > https://sources.debian.org/src/linux/6.5.6-1/kernel/Kconfig.preempt/?hl=101#
> > L101
> >
> > arm64 does not have PREEMPT_DYNAMIC_CALL, this is why PREEMPT_DYNAMIC is
> > not set by default there.
>
> Neither does amd64. So it appears something else is causing
> CONFIG_PREEMPT_DYNAMIC to be enabled on amd64.
From the commit message introducing PREEMPT_DYNAMIC:¹
CONFIG_PREEMPT_DYNAMIC is automatically selected by CONFIG_PREEMPT if
the architecture provides the necessary support (CONFIG_STATIC_CALL_INLINE,
CONFIG_GENERIC_ENTRY, and provide with __preempt_schedule_function() /
__preempt_schedule_notrace_function()).
Cheers,
Vincent
¹ https://lore.kernel.org/all/20210118141223.123667-5-frederic@kernel.org/T/#u
Back to linux.debian.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
CONFIG_PREEMPT_DYNAMIC=y? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2023-10-08 18:30 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-08 19:30 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Emanuele Rocca <ema@debian.org> - 2023-10-10 12:10 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2023-10-10 12:20 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Emanuele Rocca <ema@debian.org> - 2023-10-10 12:40 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Marc Haber <mh+debian-kernel@zugschlus.de> - 2023-10-10 15:50 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-10 14:00 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Vincent Blut <vincent.debian@free.fr> - 2023-10-10 14:20 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-10 15:20 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Emanuele Rocca <ema@debian.org> - 2023-10-10 15:00 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-10 23:30 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-17 20:00 +0200
Re: CONFIG_PREEMPT_DYNAMIC=y? Emanuele Rocca <ema@debian.org> - 2023-10-20 20:40 +0200
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