diff options
Diffstat (limited to 'debian/patches-rt/0150-irqtime-Make-accounting-correct-on-RT.patch')
| -rw-r--r-- | debian/patches-rt/0150-irqtime-Make-accounting-correct-on-RT.patch | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/debian/patches-rt/0150-irqtime-Make-accounting-correct-on-RT.patch b/debian/patches-rt/0150-irqtime-Make-accounting-correct-on-RT.patch deleted file mode 100644 index b30c1eecd..000000000 --- a/debian/patches-rt/0150-irqtime-Make-accounting-correct-on-RT.patch +++ /dev/null @@ -1,54 +0,0 @@ -From 92e2527c99184eb5921d6256c160bbb1d52a22a9 Mon Sep 17 00:00:00 2001 -From: Thomas Gleixner <tglx@linutronix.de> -Date: Tue, 9 Mar 2021 09:55:54 +0100 -Subject: [PATCH 150/296] irqtime: Make accounting correct on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.35-rt39.tar.xz - -vtime_account_irq and irqtime_account_irq() base checks on preempt_count() -which fails on RT because preempt_count() does not contain the softirq -accounting which is seperate on RT. - -These checks do not need the full preempt count as they only operate on the -hard and softirq sections. - -Use irq_count() instead which provides the correct value on both RT and non -RT kernels. The compiler is clever enough to fold the masking for !RT: - - 99b: 65 8b 05 00 00 00 00 mov %gs:0x0(%rip),%eax - - 9a2: 25 ff ff ff 7f and $0x7fffffff,%eax - + 9a2: 25 00 ff ff 00 and $0xffff00,%eax - -Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Signed-off-by: Thomas Gleixner <tglx@linutronix.de> -Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Reviewed-by: Frederic Weisbecker <frederic@kernel.org> -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - kernel/sched/cputime.c | 4 ++-- - 1 file changed, 2 insertions(+), 2 deletions(-) - -diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c -index 5f611658eeab..2c36a5fad589 100644 ---- a/kernel/sched/cputime.c -+++ b/kernel/sched/cputime.c -@@ -60,7 +60,7 @@ void irqtime_account_irq(struct task_struct *curr, unsigned int offset) - cpu = smp_processor_id(); - delta = sched_clock_cpu(cpu) - irqtime->irq_start_time; - irqtime->irq_start_time += delta; -- pc = preempt_count() - offset; -+ pc = irq_count() - offset; - - /* - * We do not account for softirq time from ksoftirqd here. -@@ -421,7 +421,7 @@ void vtime_task_switch(struct task_struct *prev) - - void vtime_account_irq(struct task_struct *tsk, unsigned int offset) - { -- unsigned int pc = preempt_count() - offset; -+ unsigned int pc = irq_count() - offset; - - if (pc & HARDIRQ_OFFSET) { - vtime_account_hardirq(tsk); --- -2.30.2 - |