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mm, vmscan: remove highmem_file_pages 

With the reintroduction of per-zone LRU stats, highmem_file_pages is
redundant so remove it.

[mgorman@techsingularity.net: wrong stat is being accumulated in highmem_dirtyable_memory]
  Link: http://lkml.kernel.org/r/20160725092324.GM10438@techsingularity.netLink: http://lkml.kernel.org/r/1469110261-7365-3-git-send-email-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Vlastimil Babka <vbabka@suse.cz>
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 2016-07-28 15:47:29 -07:00 committed by Linus Torvalds
parent 71c799f498
commit bb4cc2bea6
2 changed files with 4 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
include/linux/mm_inline.h
View File

@ -4,22 +4,6 @@
#include <linux/huge_mm.h>
#include <linux/swap.h>
#ifdef CONFIG_HIGHMEM
extern atomic_t highmem_file_pages;
static inline void acct_highmem_file_pages(int zid, enum lru_list lru,
int nr_pages)
{
if (is_highmem_idx(zid) && is_file_lru(lru))
atomic_add(nr_pages, &highmem_file_pages);
}
#else
static inline void acct_highmem_file_pages(int zid, enum lru_list lru,
int nr_pages)
{
}
#endif
/**
* page_is_file_cache - should the page be on a file LRU or anon LRU?
* @page: the page to test
@ -47,7 +31,6 @@ static __always_inline void __update_lru_size(struct lruvec *lruvec,
__mod_node_page_state(pgdat, NR_LRU_BASE + lru, nr_pages);
__mod_zone_page_state(&pgdat->node_zones[zid],
NR_ZONE_LRU_BASE + lru, nr_pages);
acct_highmem_file_pages(zid, lru, nr_pages);
}
static __always_inline void update_lru_size(struct lruvec *lruvec,

12
mm/page-writeback.c
View File

@ -299,17 +299,13 @@ static unsigned long node_dirtyable_memory(struct pglist_data *pgdat)
return nr_pages;
}
#ifdef CONFIG_HIGHMEM
atomic_t highmem_file_pages;
#endif
static unsigned long highmem_dirtyable_memory(unsigned long total)
{
#ifdef CONFIG_HIGHMEM
int node;
unsigned long x;
unsigned long x = 0;
int i;
unsigned long dirtyable = 0;
for_each_node_state(node, N_HIGH_MEMORY) {
for (i = ZONE_NORMAL + 1; i < MAX_NR_ZONES; i++) {
@ -326,12 +322,12 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
nr_pages = zone_page_state(z, NR_FREE_PAGES);
/* watch for underflows */
nr_pages -= min(nr_pages, high_wmark_pages(z));
dirtyable += nr_pages;
nr_pages += zone_page_state(z, NR_ZONE_INACTIVE_FILE);
nr_pages += zone_page_state(z, NR_ZONE_ACTIVE_FILE);
x += nr_pages;
}
}
x = dirtyable + atomic_read(&highmem_file_pages);
/*
* Unreclaimable memory (kernel memory or anonymous memory
* without swap) can bring down the dirtyable pages below