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Commit 2338a9dc authored by Vinayak Menon's avatar Vinayak Menon
Browse files

mm: vmstat: add pageoutclean 



vmstat events currently count pgpgout, but that includes
only the writebacks, and not the reclaim of clean
pages. Add an event to count clean page evictions. This is
helpful to evaluate page thrashing cases.

Change-Id: Icfb797877a544a58c289074bdc290dfbc1384514
Signed-off-by: default avatarVinayak Menon <vinmenon@codeaurora.org>
parent 53d1dd96

include/linux/vm_event_item.h

+1 −1
Original line number Diff line number Diff line
@@ -21,7 +21,7 @@ 


#define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE



enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,

enum vm_event_item { PGPGIN, PGPGOUT, PGPGOUTCLEAN, PSWPIN, PSWPOUT,

		FOR_ALL_ZONES(PGALLOC),

		PGFREE, PGACTIVATE, PGDEACTIVATE,

		PGFAULT, PGMAJFAULT,

mm/filemap.c

+4 −2
Original line number Diff line number Diff line
@@ -187,10 +187,12 @@ void __delete_from_page_cache(struct page *page, void *shadow) 
	 * invalidate any existing cleancache entries.  We can't leave

	 * stale data around in the cleancache once our page is gone

	 */

	if (PageUptodate(page) && PageMappedToDisk(page))

	if (PageUptodate(page) && PageMappedToDisk(page)) {

		count_vm_event(PGPGOUTCLEAN);

		cleancache_put_page(page);

	else

	} else {

		cleancache_invalidate_page(mapping, page);

	}



	page_cache_tree_delete(mapping, page, shadow);

mm/vmstat.c

+1 −0
Original line number Diff line number Diff line
@@ -806,6 +806,7 @@ const char * const vmstat_text[] = { 
	/* enum vm_event_item counters */

	"pgpgin",

	"pgpgout",

	"pgpgoutclean",

	"pswpin",

	"pswpout",