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flex_proportions: Allow N events instead of 1

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When batching events (such as writing back N pages in a single I/O), it
is better to do one flex_proportion operation instead of N.  There is
only one caller of __fprop_inc_percpu_max(), and it's the one we're
going to change in the next patch, so rename it instead of adding a
compatibility wrapper.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Matthew Wilcox (Oracle)
2021-03-20 16:34:54 -04:00
parent bd3488e7b4
commit be5f179752
3 changed files with 26 additions and 15 deletions
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9
include/linux/flex_proportions.h
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@@ -83,9 +83,10 @@ struct fprop_local_percpu {
int fprop_local_init_percpu(struct fprop_local_percpu *pl, gfp_t gfp);
void fprop_local_destroy_percpu(struct fprop_local_percpu *pl);
void __fprop_inc_percpu(struct fprop_global *p, struct fprop_local_percpu *pl);
void __fprop_inc_percpu_max(struct fprop_global *p, struct fprop_local_percpu *pl,
int max_frac);
void __fprop_add_percpu(struct fprop_global *p, struct fprop_local_percpu *pl,
long nr);
void __fprop_add_percpu_max(struct fprop_global *p,
struct fprop_local_percpu *pl, int max_frac, long nr);
void fprop_fraction_percpu(struct fprop_global *p,
struct fprop_local_percpu *pl, unsigned long *numerator,
unsigned long *denominator);
@@ -96,7 +97,7 @@ void fprop_inc_percpu(struct fprop_global *p, struct fprop_local_percpu *pl)
unsigned long flags;
local_irq_save(flags);
__fprop_inc_percpu(p, pl);
__fprop_add_percpu(p, pl, 1);
local_irq_restore(flags);
}