From: Frederic Weisbecker <frederic@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>,
James Morse <james.morse@arm.com>,
Quentin Perret <qperret@google.com>,
Mark Rutland <mark.rutland@arm.com>
Subject: [PATCH 0/4] arm64: Support dynamic preemption
Date: Tue, 21 Sep 2021 01:32:33 +0200 [thread overview]
Message-ID: <20210920233237.90463-1-frederic@kernel.org> (raw)
Traditionally the preemption flavour was defined on Kconfig then fixed
in stone. Now with CONFIG_PREEMPT_DYNAMIC the users can overwrite that
on boot with the "preempt=" boot option (and also through debugfs but
that's a secret).
Linux distros can be particularly fond of this because it allows them
to rely on a single kernel image for all preemption flavours.
x86 was the only supported architecture so far but interests are
broader.
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
preempt/arm
HEAD: 351eaa68b5304b8b0e7c6e7b4470dd917475e65e
Thanks,
Frederic
---
Frederic Weisbecker (3):
sched/preempt: Prepare for supporting !CONFIG_GENERIC_ENTRY dynamic preemption
arm64: Implement IRQ exit preemption static call for dynamic preemption
arm64: Implement HAVE_PREEMPT_DYNAMIC
Ard Biesheuvel (1):
arm64: implement support for static call trampolines
arch/Kconfig | 1 -
arch/arm64/Kconfig | 2 ++
arch/arm64/include/asm/insn.h | 2 ++
arch/arm64/include/asm/preempt.h | 23 ++++++++++++++++++++++-
arch/arm64/include/asm/static_call.h | 28 ++++++++++++++++++++++++++++
arch/arm64/kernel/Makefile | 4 ++--
arch/arm64/kernel/entry-common.c | 15 ++++++++++++---
arch/arm64/kernel/patching.c | 14 +++++++++++---
arch/arm64/kernel/vmlinux.lds.S | 1 +
include/linux/entry-common.h | 3 ++-
kernel/sched/core.c | 6 ++++--
11 files changed, 86 insertions(+), 13 deletions(-)
next reply other threads:[~2021-09-20 23:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-20 23:32 Frederic Weisbecker [this message]
2021-09-20 23:32 ` [PATCH 1/4] sched/preempt: Prepare for supporting !CONFIG_GENERIC_ENTRY dynamic preemption Frederic Weisbecker
2021-09-21 7:10 ` Peter Zijlstra
2021-09-21 13:50 ` Mark Rutland
2021-09-20 23:32 ` [PATCH 2/4] arm64: implement support for static call trampolines Frederic Weisbecker
2021-09-21 7:09 ` Peter Zijlstra
2021-09-21 14:44 ` Ard Biesheuvel
2021-09-21 15:08 ` Peter Zijlstra
2021-09-21 15:33 ` Mark Rutland
2021-09-21 15:55 ` Ard Biesheuvel
2021-09-21 16:28 ` Mark Rutland
2021-09-25 17:46 ` David Laight
2021-09-27 8:58 ` Mark Rutland
2021-09-21 16:10 ` Ard Biesheuvel
2021-09-20 23:32 ` [PATCH 3/4] arm64: Implement IRQ exit preemption static call for dynamic preemption Frederic Weisbecker
2021-09-20 23:32 ` [PATCH 4/4] arm64: Implement HAVE_PREEMPT_DYNAMIC Frederic Weisbecker
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