Messages in this thread | | | From | Frederic Weisbecker <> | Subject | [PATCH 0/5] context_tracking: Flatter archs not using exception_enter/exit() v2 | Date | Tue, 27 Oct 2020 16:08:22 +0100 |
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In order to be able to turn on/off nohz_full at runtime, we'll need the archs to give up saving the context tracking state on the task stack because this forces context tracking to run system wide, even on CPUs that don't have nohz_full enabled.
Now being able to do so require sane entry code meeting some requirements that at least x86 just achieved recently (I haven't checked other archs yet).
Changes since v2:
- Rebase against v5.10-rc1 - Use SCHED_WARN_ON() instead of WARN_ON_ONCE() for the context tracking sanity check on schedule().
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git core/isolation-v2
HEAD: 79f60f3dd0e0aea8b17c825371d8697444ae5faf
Thanks, Frederic ---
Frederic Weisbecker (5): context_tracking: Introduce HAVE_CONTEXT_TRACKING_OFFSTACK context_tracking: Don't implement exception_enter/exit() on CONFIG_HAVE_CONTEXT_TRACKING_OFFSTACK sched: Detect call to schedule from critical entry code context_tracking: Only define schedule_user() on !HAVE_CONTEXT_TRACKING_OFFSTACK archs x86: Support HAVE_CONTEXT_TRACKING_OFFSTACK
arch/Kconfig | 17 +++++++++++++++++ arch/x86/Kconfig | 1 + include/linux/context_tracking.h | 6 ++++-- kernel/sched/core.c | 3 ++- 4 files changed, 24 insertions(+), 3 deletions(-)
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