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sched/debug: Rename 'schedstat_val()' -> 'schedstat_val_or_zero()'

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The schedstat_val() macro's behavior is kind of surprising: when
schedstat is runtime disabled, it returns zero.  Rename it to
schedstat_val_or_zero().

There's also a need for a similar macro which doesn't have the 'if
(schedstat_enable())' check, to avoid doing the check twice.  Create a
new 'schedstat_val()' macro for that.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/3bb1d2367d041fee333b0dde17171e709395b675.1466184592.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Josh Poimboeuf 2016-06-17 12:43:25 -05:00 • committed by Ingo Molnar
parent ae92882e56
commit 20e1d4863b
2 changed files with 5 additions and 3 deletions
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4
kernel/sched/debug.c
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@ -429,9 +429,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
p->prio);
SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
SPLIT_NS(schedstat_val(p->se.statistics.wait_sum)),
SPLIT_NS(schedstat_val_or_zero(p->se.statistics.wait_sum)),
SPLIT_NS(p->se.sum_exec_runtime),
SPLIT_NS(schedstat_val(p->se.statistics.sum_sleep_runtime)));
SPLIT_NS(schedstat_val_or_zero(p->se.statistics.sum_sleep_runtime)));
#ifdef CONFIG_NUMA_BALANCING
SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p));