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Commit 3a2fd6fb authored Jul 13, 2015 by Vinayak Menon Committed by Charan Teja Reddy May 11, 2018

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: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>

parent 0d88cce3

include/linux/vm_event_item.h

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -22,7 +22,7 @@

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

mm/filemap.c

+4 −2

Original line number	Original line	Diff line number	Diff line
	@@ -194,10 +194,12 @@ void __delete_from_page_cache(struct page page, void shadow)
	* invalidate any existing cleancache entries. We can't leave		* invalidate any existing cleancache entries. We can't leave
	* stale data around in the cleancache once our page is gone		* 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);		cleancache_put_page(page);
	else		} else {
	cleancache_invalidate_page(mapping, page);		cleancache_invalidate_page(mapping, page);
			}

	VM_BUG_ON_PAGE(PageTail(page), page);		VM_BUG_ON_PAGE(PageTail(page), page);
	VM_BUG_ON_PAGE(page_mapped(page), page);		VM_BUG_ON_PAGE(page_mapped(page), page);

mm/vmstat.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1099,6 +1099,7 @@ const char * const vmstat_text[] = {
	/* enum vm_event_item counters */		/* enum vm_event_item counters */
	"pgpgin",		"pgpgin",
	"pgpgout",		"pgpgout",
			"pgpgoutclean",
	"pswpin",		"pswpin",
	"pswpout",		"pswpout",