To check on zone balancing, split the /proc/vmstat:pgsteal stats into
pgsteal_hi and pgsteal_lo: highmem and lowmem.
---
include/linux/page-flags.h | 5 +++--
mm/page_alloc.c | 5 +++--
mm/vmscan.c | 9 ++++++---
3 files changed, 12 insertions(+), 7 deletions(-)
diff -puN mm/page_alloc.c~instrument-highmem-page-reclaim mm/page_alloc.c
--- 25/mm/page_alloc.c~instrument-highmem-page-reclaim 2004-02-22 02:08:12.000000000 -0800
+++ 25-akpm/mm/page_alloc.c 2004-02-22 02:08:12.000000000 -0800
@@ -1491,10 +1491,11 @@ static char *vmstat_text[] = {
"pgscan",
"pgrefill",
- "pgsteal",
+ "pgsteal_hi",
+ "pgsteal_lo",
"pginodesteal",
- "kswapd_steal",
+ "kswapd_steal",
"kswapd_inodesteal",
"pageoutrun",
"allocstall",
diff -puN include/linux/page-flags.h~instrument-highmem-page-reclaim include/linux/page-flags.h
--- 25/include/linux/page-flags.h~instrument-highmem-page-reclaim 2004-02-22 02:08:12.000000000 -0800
+++ 25-akpm/include/linux/page-flags.h 2004-02-22 02:08:12.000000000 -0800
@@ -108,10 +108,11 @@ struct page_state {
unsigned long pgscan; /* pages scanned by page reclaim */
unsigned long pgrefill; /* inspected in refill_inactive_zone */
- unsigned long pgsteal; /* total pages reclaimed */
+ unsigned long pgsteal_hi; /* total highmem pages reclaimed */
+ unsigned long pgsteal_lo; /* total lowmem pages reclaimed */
unsigned long pginodesteal; /* pages reclaimed via inode freeing */
- unsigned long kswapd_steal; /* pages reclaimed by kswapd */
+ unsigned long kswapd_steal; /* pages reclaimed by kswapd */
unsigned long kswapd_inodesteal;/* reclaimed via kswapd inode freeing */
unsigned long pageoutrun; /* kswapd's calls to page reclaim */
unsigned long allocstall; /* direct reclaim calls */
diff -puN mm/vmscan.c~instrument-highmem-page-reclaim mm/vmscan.c
--- 25/mm/vmscan.c~instrument-highmem-page-reclaim 2004-02-22 02:08:12.000000000 -0800
+++ 25-akpm/mm/vmscan.c 2004-02-22 02:08:42.000000000 -0800
@@ -461,9 +461,6 @@ keep:
list_splice(&ret_pages, page_list);
if (pagevec_count(&freed_pvec))
__pagevec_release_nonlru(&freed_pvec);
- mod_page_state(pgsteal, ret);
- if (current_is_kswapd())
- mod_page_state(kswapd_steal, ret);
mod_page_state(pgactivate, pgactivate);
return ret;
}
@@ -537,6 +534,12 @@ shrink_cache(const int nr_pages, struct
mod_page_state(pgscan, nr_scan);
nr_freed = shrink_list(&page_list, gfp_mask,
&max_scan, nr_mapped);
+ if (current_is_kswapd())
+ mod_page_state(kswapd_steal, nr_freed);
+ if (is_highmem(zone))
+ mod_page_state(pgsteal_hi, nr_freed);
+ else
+ mod_page_state(pgsteal_lo, nr_freed);
ret += nr_freed;
if (nr_freed <= 0 && list_empty(&page_list))
goto done;
_