From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <frederic@kernel.org>,
Paul McKenney <paulmck@kernel.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [patch V2 0/9] softirq: Make it RT aware
Date: Fri, 04 Dec 2020 18:01:51 +0100 [thread overview]
Message-ID: <20201204170151.960336698@linutronix.de> (raw)
RT runs softirq processing always in thread context and it requires that
both the softirq execution and the BH disabled sections are preemptible.
This is achieved by serialization through per CPU local locks and
substituting a few parts of the existing softirq processing code with
helper functions.
The series applies on top of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
which already contains the irqstat cleanups and Frederic's irq time
accounting changes.
Changes to V1 which can be found here:
https://lore.kernel.org/r/20201113140207.499353218@linutronix.de
- Rebase on top of Frederic's irq time accounting changes
- Addressing the review comments
- Fixing the fallout from the irq time accounting updates
The RT variant has sucessfully been tested in the current 5.10-rt
patches. For non-RT kernels there is no functional change.
Thanks,
tglx
---
include/linux/bottom_half.h | 8 +
include/linux/hardirq.h | 1
include/linux/interrupt.h | 13 --
include/linux/preempt.h | 6
include/linux/rcupdate.h | 3
include/linux/sched.h | 3
kernel/sched/cputime.c | 4
kernel/softirq.c | 280 +++++++++++++++++++++++++++++++++++++++++---
kernel/time/tick-sched.c | 2
9 files changed, 291 insertions(+), 29 deletions(-)
next reply other threads:[~2020-12-04 17:10 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-04 17:01 Thomas Gleixner [this message]
2020-12-04 17:01 ` [patch V2 1/9] softirq: Add RT specific softirq accounting Thomas Gleixner
2020-12-07 13:06 ` Frederic Weisbecker
2020-12-04 17:01 ` [patch V2 2/9] irqtime: Make accounting correct on RT Thomas Gleixner
2020-12-07 0:23 ` Frederic Weisbecker
2020-12-07 0:57 ` Thomas Gleixner
2020-12-07 1:14 ` Frederic Weisbecker
2020-12-07 13:27 ` Frederic Weisbecker
2020-12-07 14:44 ` Thomas Gleixner
2020-12-04 17:01 ` [patch V2 3/9] softirq: Move various protections into inline helpers Thomas Gleixner
2020-12-07 13:37 ` Frederic Weisbecker
2020-12-04 17:01 ` [patch V2 4/9] softirq: Make softirq control and processing RT aware Thomas Gleixner
2020-12-07 14:16 ` Frederic Weisbecker
2020-12-07 15:08 ` Thomas Gleixner
2020-12-08 0:08 ` Frederic Weisbecker
2020-12-09 10:11 ` Peter Zijlstra
2020-12-09 12:36 ` Thomas Gleixner
2020-12-09 12:42 ` Peter Zijlstra
2020-12-09 13:30 ` Thomas Gleixner
2020-12-09 10:34 ` Peter Zijlstra
2020-12-04 17:01 ` [patch V2 5/9] tick/sched: Prevent false positive softirq pending warnings on RT Thomas Gleixner
2020-12-08 12:23 ` Frederic Weisbecker
2020-12-04 17:01 ` [patch V2 6/9] rcu: Prevent false positive softirq warning " Thomas Gleixner
2020-12-04 17:59 ` Paul E. McKenney
2020-12-04 17:01 ` [patch V2 7/9] softirq: Replace barrier() with cpu_relax() in tasklet_unlock_wait() Thomas Gleixner
2020-12-07 11:39 ` Peter Zijlstra
2020-12-07 15:21 ` Thomas Gleixner
2020-12-04 17:01 ` [patch V2 8/9] tasklets: Use static inlines for stub implementations Thomas Gleixner
2020-12-04 17:02 ` [patch V2 9/9] tasklets: Prevent kill/unlock_wait deadlock on RT Thomas Gleixner
2020-12-07 11:47 ` Peter Zijlstra
2020-12-07 14:00 ` Sebastian Andrzej Siewior
2020-12-07 14:27 ` Peter Zijlstra
2020-12-07 17:55 ` Thomas Gleixner
2020-12-07 15:22 ` Thomas Gleixner
2020-12-07 15:39 ` Sebastian Andrzej Siewior
2020-12-07 17:49 ` Thomas Gleixner
2020-12-07 17:50 ` Thomas Gleixner
2020-12-06 10:05 ` [patch V2 0/9] softirq: Make it RT aware Sebastian Andrzej Siewior
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