Commit d54cb7d5 authored by Gerald Schaefer's avatar Gerald Schaefer Committed by Heiko Carstens
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s390/vtime: fix increased steal time accounting 



Commit 152e9b86 ("s390/vtime: steal time exponential moving average")
inadvertently changed the input value for account_steal_time() from
"cputime_to_nsecs(steal)" to just "steal", resulting in broken increased
steal time accounting.

Fix this by changing it back to "cputime_to_nsecs(steal)".

Fixes: 152e9b86 ("s390/vtime: steal time exponential moving average")
Cc: <stable@vger.kernel.org> # 5.1
Reported-by: default avatarSabine Forkel <sabine.forkel@de.ibm.com>
Reviewed-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarGerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent c79f01b6

arch/s390/kernel/vtime.c

+1 −1
Original line number Diff line number Diff line
@@ -214,7 +214,7 @@ void vtime_flush(struct task_struct *tsk) 
	avg_steal = S390_lowcore.avg_steal_timer / 2;

	if ((s64) steal > 0) {

		S390_lowcore.steal_timer = 0;

		account_steal_time(steal);

		account_steal_time(cputime_to_nsecs(steal));

		avg_steal += steal;

	}

	S390_lowcore.avg_steal_timer = avg_steal;