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Frederic Weisbecker 25e2d8c1b9 sched/cputime: Fix ksoftirqd cputime accounting regression ... irq_time_read() returns the irqtime minus the ksoftirqd time. This is necessary because irq_time_read() is used to substract the IRQ time from the sum_exec_runtime of a task. If we were to include the softirq time of ksoftirqd, this task would substract its own CPU time everytime it updates ksoftirqd->sum_exec_runtime which would therefore never progress. But this behaviour got broken by: a499a5a14d ("sched/cputime: Increment kcpustat directly on irqtime account") ... which now includes ksoftirqd softirq time in the time returned by irq_time_read(). This has resulted in wrong ksoftirqd cputime reported to userspace through /proc/stat and thus "top" not showing ksoftirqd when it should after intense networking load. ksoftirqd->stime happens to be correct but it gets scaled down by sum_exec_runtime through task_cputime_adjusted(). To fix this, just account the strict IRQ time in a separate counter and use it to report the IRQ time. Reported-and-tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Rik van Riel <riel@redhat.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wanpeng Li <wanpeng.li@hotmail.com> Link: http://lkml.kernel.org/r/1493129448-5356-1-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		8 years ago
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Makefile	sched/autogroup: Rename auto_group.[ch] to autogroup.[ch]	8 years ago
autogroup.c	sched/autogroup: Rename auto_group.[ch] to autogroup.[ch]	8 years ago
autogroup.h	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/autogroup.h>	8 years ago
clock.c	sched/clock: Fix broken stable to unstable transfer	8 years ago
completion.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	8 years ago
core.c	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	8 years ago
cpuacct.c	sched/cputime: Convert kcpustat to nsecs	8 years ago
cpuacct.h	…
cpudeadline.c	sched/core: Remove the tsk_cpus_allowed() wrapper	8 years ago
cpudeadline.h	sched/deadline: Split cpudl_set() into cpudl_set() and cpudl_clear()	9 years ago
cpufreq.c	cpufreq / sched: Pass flags to cpufreq_update_util()	9 years ago
cpufreq_schedutil.c	cpufreq: schedutil: Fix per-CPU structure initialization in sugov_start()	8 years ago
cpupri.c	sched/core: Remove the tsk_cpus_allowed() wrapper	8 years ago
cpupri.h	…
cputime.c	sched/cputime: Fix ksoftirqd cputime accounting regression	8 years ago
deadline.c	sched/deadline: Use deadline instead of period when calculating overflow	8 years ago
debug.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	8 years ago
fair.c	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	8 years ago
features.h	sched/fair: Make select_idle_cpu() more aggressive	8 years ago
idle.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/idle.h>	8 years ago
idle_task.c	sched/core: Add wrappers for lockdep_(un)pin_lock()	8 years ago
loadavg.c	sched/loadavg: Use {READ,WRITE}_ONCE() for sample window	8 years ago
rt.c	sched/core: Remove the tsk_nr_cpus_allowed() wrapper	8 years ago
sched.h	sched/cputime: Fix ksoftirqd cputime accounting regression	8 years ago
stats.c	…
stats.h	sched/headers: Move cputime functionality from <linux/sched.h> and <linux/cputime.h> into <linux/sched/cputime.h>	8 years ago
stop_task.c	sched/core: Add wrappers for lockdep_(un)pin_lock()	8 years ago
swait.c	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	8 years ago
topology.c	sched/topology: Split out scheduler topology code from core.c into topology.c	8 years ago
wait.c	sched/headers: fix up header file dependency on <linux/sched/signal.h>	8 years ago