Re: + ksm-add-vm_stat-and-meminfo-entry-to-reflect-pte-mapping-to-ksm-pages.patch added to -mm tree

[Johannes Weiner <hannes@cmpxchg.org>]

On Tue, Mar 01, 2011 at 03:41:06PM -0800, akpm@linux-foundation.org wrote:
> diff -puN include/linux/mmzone.h~ksm-add-vm_stat-and-meminfo-entry-to-reflect-pte-mapping-to-ksm-pages include/linux/mmzone.h
> --- a/include/linux/mmzone.h~ksm-add-vm_stat-and-meminfo-entry-to-reflect-pte-mapping-to-ksm-pages
> +++ a/include/linux/mmzone.h
> @@ -115,6 +115,9 @@ enum zone_stat_item {
>  	NUMA_OTHER,		/* allocation from other node */
>  #endif
>  	NR_ANON_TRANSPARENT_HUGEPAGES,
> +#ifdef CONFIG_KSM
> +	NR_KSM_PAGES_SHARING,
> +#endif
>  	NR_VM_ZONE_STAT_ITEMS };

This adds a zone stat item without a corresponding entry in
vm_stat_text.  As a result, all vm event entries in /proc/vmstat show
the value of the respective previous counter.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
---

diff --git a/mm/vmstat.c b/mm/vmstat.c
index 5ce2d0a..fca991c 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -886,6 +886,9 @@ static const char * const vmstat_text[] = {
 	"numa_other",
 #endif
 	"nr_anon_transparent_hugepages",
+#ifdef CONFIG_KSM
+	"nr_ksm_pages_sharing",
+#endif
 	"nr_dirty_threshold",
 	"nr_dirty_background_threshold",