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Commit 95ecedcd authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Linus Torvalds
Browse files

thp, vmstats: add counters for huge file pages 

THP_FILE_ALLOC: how many times huge page was allocated and put page
cache.

THP_FILE_MAPPED: how many times file huge page was mapped.

Link: http://lkml.kernel.org/r/1466021202-61880-13-git-send-email-kirill.shutemov@linux.intel.com


Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 10102459

include/linux/vm_event_item.h

+7 −0
Original line number Diff line number Diff line
@@ -70,6 +70,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, 
		THP_FAULT_FALLBACK,

		THP_COLLAPSE_ALLOC,

		THP_COLLAPSE_ALLOC_FAILED,

		THP_FILE_ALLOC,

		THP_FILE_MAPPED,

		THP_SPLIT_PAGE,

		THP_SPLIT_PAGE_FAILED,

		THP_DEFERRED_SPLIT_PAGE,
@@ -100,4 +102,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, 
		NR_VM_EVENT_ITEMS

};



#ifndef CONFIG_TRANSPARENT_HUGEPAGE

#define THP_FILE_ALLOC ({ BUILD_BUG(); 0; })

#define THP_FILE_MAPPED ({ BUILD_BUG(); 0; })

#endif



#endif		/* VM_EVENT_ITEM_H_INCLUDED */

mm/memory.c

+1 −0
Original line number Diff line number Diff line
@@ -2968,6 +2968,7 @@ static int do_set_pmd(struct fault_env *fe, struct page *page) 


	/* fault is handled */

	ret = 0;

	count_vm_event(THP_FILE_MAPPED);

out:

	spin_unlock(fe->ptl);

	return ret;

mm/vmstat.c

+2 −0
Original line number Diff line number Diff line
@@ -817,6 +817,8 @@ const char * const vmstat_text[] = { 
	"thp_fault_fallback",

	"thp_collapse_alloc",

	"thp_collapse_alloc_failed",

	"thp_file_alloc",

	"thp_file_mapped",

	"thp_split_page",

	"thp_split_page_failed",

	"thp_deferred_split_page",