Commit ae37fe5c authored Oct 16, 2019 by Frederic Weisbecker Committed by Ingo Molnar Oct 29, 2019

procfs: Use vtime aware kcpustat accessor to fetch CPUTIME_SYSTEM

Now that we have a vtime safe kcpustat accessor for CPUTIME_SYSTEM, use
it to start fixing frozen kcpustat values on nohz_full CPUs.

Reported-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J . Wysocki <rjw@rjwysocki.net>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Wanpeng Li <wanpengli@tencent.com>
Link: https://lkml.kernel.org/r/20191016025700.31277-13-frederic@kernel.org

Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 64eea63c

fs/proc/stat.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -124,7 +124,7 @@ static int show_stat(struct seq_file p, void v)

		user += kcs->cpustat[CPUTIME_USER];
		nice += kcs->cpustat[CPUTIME_NICE];
		system += kcs->cpustat[CPUTIME_SYSTEM];
		system += kcpustat_field(kcs, CPUTIME_SYSTEM, i);
		idle += get_idle_time(kcs, i);
		iowait += get_iowait_time(kcs, i);
		irq += kcs->cpustat[CPUTIME_IRQ];
		@@ -162,7 +162,7 @@ static int show_stat(struct seq_file p, void v)
		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
		user = kcs->cpustat[CPUTIME_USER];
		nice = kcs->cpustat[CPUTIME_NICE];
		system = kcs->cpustat[CPUTIME_SYSTEM];
		system = kcpustat_field(kcs, CPUTIME_SYSTEM, i);
		idle = get_idle_time(kcs, i);
		iowait = get_iowait_time(kcs, i);
		irq = kcs->cpustat[CPUTIME_IRQ];

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