Re: [PATCH 00/20] rcu/context-tracking: Merge RCU eqs-dynticks counter to context tracking v5

From: Paul E. McKenney
Date: Wed Jun 29 2022 - 20:10:14 EST

On Tue, Jun 28, 2022 at 03:15:59PM +0200, Frederic Weisbecker wrote:
> This is the same as rcu:ctxt.2022.06.21a (no rebase) with minimal changes
> on the following patches:
>
> * [06/20] fix missing function renames on xtensa (thanks Max Filippov, SOB added)
> * [09/20] fix missing Kconfig renames on xtensa (thanks Max Filippov, SOB added)
> and also on loongarch.
> * [18/20] remove unecessary and buggy notrace from rcu_preempt_deferred_qs(). It's called
> after intrumentation_begin() in EQS functions.
>
> git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
> rcu/ctxt.2022.06.27
>
> HEAD: cb0045adde39bba5ffc620a184b1685a869569d8

Thank you! I have pulled this into -rcu as branch ctxt.2022.06.29a.
If testing goes well, I will re-merge it into branch "dev".

The diffs from the earlier version are indeed small, as promised.

I did reword the authorship of 06/20 and 09/20 because this looked to
me to be feedback rather than authorship. I credited Max like this:

[ frederic: Apply Max Filippov feedback. ]

If you feel strongly about Max having authorship, please set this up
using the Co-developed-by rules shown in submitting-patches.rst and send
me an update.

Thanx, Paul

> Thanks,
> Frederic
> ---
>
> Frederic Weisbecker (19):
> context_tracking: Remove unused context_tracking_in_user()
> context_tracking: Add a note about noinstr VS unsafe context tracking functions
> context_tracking: Rename __context_tracking_enter/exit() to __ct_user_enter/exit()
> context_tracking: Rename context_tracking_user_enter/exit() to user_enter/exit_callable()
> context_tracking: Rename context_tracking_enter/exit() to ct_user_enter/exit()
> context_tracking: Rename context_tracking_cpu_set() to ct_cpu_track_user()
> context_tracking: Split user tracking Kconfig
> context_tracking: Take idle eqs entrypoints over RCU
> context_tracking: Take IRQ eqs entrypoints over RCU
> context_tracking: Take NMI eqs entrypoints over RCU
> rcu/context-tracking: Remove rcu_irq_enter/exit()
> rcu/context_tracking: Move dynticks counter to context tracking
> rcu/context_tracking: Move dynticks_nesting to context tracking
> rcu/context_tracking: Move dynticks_nmi_nesting to context tracking
> rcu/context-tracking: Move deferred nocb resched to context tracking
> rcu/context-tracking: Move RCU-dynticks internal functions to context_tracking
> rcu/context-tracking: Remove unused and/or unecessary middle functions
> context_tracking: Convert state to atomic_t
> MAINTAINERS: Add Paul as context tracking maintainer
>
> Paul E. McKenney (1):
> context_tracking: Use arch_atomic_read() in __ct_state for KASAN
>
>
> .../RCU/Design/Requirements/Requirements.rst | 10 +-
> Documentation/RCU/stallwarn.rst | 6 +-
> .../time/context-tracking/arch-support.txt | 6 +-
> MAINTAINERS | 1 +
> arch/Kconfig | 8 +-
> arch/arm/Kconfig | 2 +-
> arch/arm/kernel/entry-common.S | 4 +-
> arch/arm/kernel/entry-header.S | 12 +-
> arch/arm/mach-imx/cpuidle-imx6q.c | 5 +-
> arch/arm64/Kconfig | 2 +-
> arch/arm64/kernel/entry-common.c | 14 +-
> arch/csky/Kconfig | 2 +-
> arch/csky/kernel/entry.S | 8 +-
> arch/loongarch/Kconfig | 2 +-
> arch/mips/Kconfig | 2 +-
> arch/powerpc/Kconfig | 2 +-
> arch/powerpc/include/asm/context_tracking.h | 2 +-
> arch/riscv/Kconfig | 2 +-
> arch/riscv/kernel/entry.S | 12 +-
> arch/sparc/Kconfig | 2 +-
> arch/sparc/kernel/rtrap_64.S | 2 +-
> arch/x86/Kconfig | 4 +-
> arch/x86/mm/fault.c | 2 +-
> arch/xtensa/Kconfig | 2 +-
> arch/xtensa/kernel/entry.S | 8 +-
> drivers/acpi/processor_idle.c | 5 +-
> drivers/cpuidle/cpuidle-psci.c | 8 +-
> drivers/cpuidle/cpuidle-riscv-sbi.c | 8 +-
> drivers/cpuidle/cpuidle.c | 9 +-
> include/linux/context_tracking.h | 95 ++--
> include/linux/context_tracking_irq.h | 21 +
> include/linux/context_tracking_state.h | 113 +++-
> include/linux/entry-common.h | 10 +-
> include/linux/hardirq.h | 12 +-
> include/linux/rcupdate.h | 17 +-
> include/linux/rcutiny.h | 6 -
> include/linux/rcutree.h | 9 +-
> include/linux/tracepoint.h | 4 +-
> init/Kconfig | 4 +-
> kernel/cfi.c | 4 +-
> kernel/context_tracking.c | 617 +++++++++++++++++++--
> kernel/cpu_pm.c | 8 +-
> kernel/entry/common.c | 16 +-
> kernel/extable.c | 4 +-
> kernel/locking/lockdep.c | 2 +-
> kernel/rcu/Kconfig | 2 +
> kernel/rcu/rcu.h | 4 -
> kernel/rcu/tree.c | 476 +---------------
> kernel/rcu/tree.h | 8 -
> kernel/rcu/tree_exp.h | 2 +-
> kernel/rcu/tree_plugin.h | 38 +-
> kernel/rcu/tree_stall.h | 8 +-
> kernel/rcu/update.c | 2 +-
> kernel/sched/core.c | 2 +-
> kernel/sched/idle.c | 10 +-
> kernel/sched/sched.h | 1 +
> kernel/softirq.c | 4 +-
> kernel/time/Kconfig | 37 +-
> kernel/time/tick-sched.c | 2 +-
> kernel/trace/trace.c | 8 +-
> 60 files changed, 934 insertions(+), 764 deletions(-)