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mm: move zone watermark accesses behind an accessor

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This is a preparation patch only, no functional change.

Link: http://lkml.kernel.org/r/20181123114528.28802-3-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Zi Yan <zi.yan@cs.rutgers.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman 2018-12-28 00:35:44 -08:00 committed by Linus Torvalds
parent 6bb154504f
commit a921444382
3 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/mmzone.h
View File

@ -269,9 +269,10 @@ enum zone_watermarks {
NR_WMARK
};
#define min_wmark_pages(z) (z->watermark[WMARK_MIN])
#define low_wmark_pages(z) (z->watermark[WMARK_LOW])
#define high_wmark_pages(z) (z->watermark[WMARK_HIGH])
#define min_wmark_pages(z) (z->_watermark[WMARK_MIN])
#define low_wmark_pages(z) (z->_watermark[WMARK_LOW])
#define high_wmark_pages(z) (z->_watermark[WMARK_HIGH])
#define wmark_pages(z, i) (z->_watermark[i])
struct per_cpu_pages {
int count; /* number of pages in the list */
@ -362,7 +363,7 @@ struct zone {
/* Read-mostly fields */
/* zone watermarks, access with *_wmark_pages(zone) macros */
unsigned long watermark[NR_WMARK];
unsigned long _watermark[NR_WMARK];
unsigned long nr_reserved_highatomic;

2
mm/compaction.c
View File

@ -1431,7 +1431,7 @@ static enum compact_result __compaction_suitable(struct zone *zone, int order,
if (is_via_compact_memory(order))
return COMPACT_CONTINUE;
watermark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
watermark = wmark_pages(zone, alloc_flags & ALLOC_WMARK_MASK);
/*
* If watermarks for high-order allocation are already met, there
* should be no need for compaction at all.

12
mm/page_alloc.c
View File

@ -3376,7 +3376,7 @@ retry:
}
}
mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
mark = wmark_pages(zone, alloc_flags & ALLOC_WMARK_MASK);
if (!zone_watermark_fast(zone, order, mark,
ac_classzone_idx(ac), alloc_flags)) {
int ret;
@ -4793,7 +4793,7 @@ long si_mem_available(void)
pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
for_each_zone(zone)
wmark_low += zone->watermark[WMARK_LOW];
wmark_low += low_wmark_pages(zone);
/*
* Estimate the amount of memory available for userspace allocations,
@ -7431,13 +7431,13 @@ static void __setup_per_zone_wmarks(void)
min_pages = zone_managed_pages(zone) / 1024;
min_pages = clamp(min_pages, SWAP_CLUSTER_MAX, 128UL);
zone->watermark[WMARK_MIN] = min_pages;
zone->_watermark[WMARK_MIN] = min_pages;
} else {
/*
* If it's a lowmem zone, reserve a number of pages
* proportionate to the zone's size.
*/
zone->watermark[WMARK_MIN] = tmp;
zone->_watermark[WMARK_MIN] = tmp;
}
/*
@ -7449,8 +7449,8 @@ static void __setup_per_zone_wmarks(void)
mult_frac(zone_managed_pages(zone),
watermark_scale_factor, 10000));
zone->watermark[WMARK_LOW] = min_wmark_pages(zone) + tmp;
zone->watermark[WMARK_HIGH] = min_wmark_pages(zone) + tmp * 2;
zone->_watermark[WMARK_LOW] = min_wmark_pages(zone) + tmp;
zone->_watermark[WMARK_HIGH] = min_wmark_pages(zone) + tmp * 2;
spin_unlock_irqrestore(&zone->lock, flags);
}