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lib/flex_proportions.c: cleanup __fprop_inc_percpu_max

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If the given type has fraction smaller than max_frac/FPROP_FRAC_BASE, the
code could be modified to call __fprop_inc_percpu() directly and easier to
understand.  After this patch, fprop_reflect_period_percpu() will be
called twice, and quicky return on pl->period == p->period test, so it
would not result to significant downside of performance.

Thanks for Jan's guidance.

Signed-off-by: Tan Hu <tan.hu@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: <xue.zhihong@zte.com.cn>
Cc: Yi Wang <wang.yi59@zte.com.cn>
Cc: <wang.liang82@zte.com.cn>
Link: http://lkml.kernel.org/r/1589004753-27554-1-git-send-email-tan.hu@zte.com.cn
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tan Hu 2020-06-04 16:50:23 -07:00 committed by Linus Torvalds
parent a818e526cb
commit 63d7f8167f
1 changed files with 3 additions and 4 deletions
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7
lib/flex_proportions.c
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@ -266,8 +266,7 @@ void __fprop_inc_percpu_max(struct fprop_global *p,
if (numerator > if (numerator >
(((u64)denominator) * max_frac) >> FPROP_FRAC_SHIFT) (((u64)denominator) * max_frac) >> FPROP_FRAC_SHIFT)
return; return;
} else }
fprop_reflect_period_percpu(p, pl);
percpu_counter_add_batch(&pl->events, 1, PROP_BATCH); __fprop_inc_percpu(p, pl);
percpu_counter_add(&p->events, 1);
} }