Messages in this thread | | | From | Frederic Weisbecker <> | Subject | [PATCH 0/4] arm64: Support dynamic preemption | Date | Tue, 21 Sep 2021 01:32:33 +0200 |
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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(-)
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