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mm/vmstat.c: uninline node_page_state() 

With x86_64 (config http://ozlabs.org/~akpm/config-akpm2.txt) and old gcc
(4.4.4), drivers/base/node.c:node_read_meminfo() is using 2344 bytes of
stack.  Uninlining node_page_state() reduces this to 440 bytes.

The stack consumption issue is fixed by newer gcc (4.8.4) however with
that compiler this patch reduces the node.o text size from 7314 bytes to
4578.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2015-11-05 18:48:43 -08:00 committed by Linus Torvalds
parent 27f28b972e
commit c2d42c16ad
2 changed files with 23 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
include/linux/vmstat.h
View File

@ -161,30 +161,8 @@ static inline unsigned long zone_page_state_snapshot(struct zone *zone,
}
#ifdef CONFIG_NUMA
/*
* Determine the per node value of a stat item. This function
* is called frequently in a NUMA machine, so try to be as
* frugal as possible.
*/
static inline unsigned long node_page_state(int node,
enum zone_stat_item item)
{
struct zone *zones = NODE_DATA(node)->node_zones;
return
#ifdef CONFIG_ZONE_DMA
zone_page_state(&zones[ZONE_DMA], item) +
#endif
#ifdef CONFIG_ZONE_DMA32
zone_page_state(&zones[ZONE_DMA32], item) +
#endif
#ifdef CONFIG_HIGHMEM
zone_page_state(&zones[ZONE_HIGHMEM], item) +
#endif
zone_page_state(&zones[ZONE_NORMAL], item) +
zone_page_state(&zones[ZONE_MOVABLE], item);
}
extern unsigned long node_page_state(int node, enum zone_stat_item item);
extern void zone_statistics(struct zone *, struct zone *, gfp_t gfp);
#else

22
mm/vmstat.c
View File

@ -591,6 +591,28 @@ void zone_statistics(struct zone *preferred_zone, struct zone *z, gfp_t flags)
else
__inc_zone_state(z, NUMA_OTHER);
}
/*
* Determine the per node value of a stat item.
*/
unsigned long node_page_state(int node, enum zone_stat_item item)
{
struct zone *zones = NODE_DATA(node)->node_zones;
return
#ifdef CONFIG_ZONE_DMA
zone_page_state(&zones[ZONE_DMA], item) +
#endif
#ifdef CONFIG_ZONE_DMA32
zone_page_state(&zones[ZONE_DMA32], item) +
#endif
#ifdef CONFIG_HIGHMEM
zone_page_state(&zones[ZONE_HIGHMEM], item) +
#endif
zone_page_state(&zones[ZONE_NORMAL], item) +
zone_page_state(&zones[ZONE_MOVABLE], item);
}
#endif
#ifdef CONFIG_COMPACTION