Commit 798a6b87 authored by Peter Xu's avatar Peter Xu Committed by Linus Torvalds
Browse files

mm: Add PGREUSE counter 



This accounts for wp_page_reuse() case, where we reused a page for COW.

Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a308c71b

include/linux/vm_event_item.h

+1 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, 
		PGFAULT, PGMAJFAULT,

		PGLAZYFREED,

		PGREFILL,

		PGREUSE,

		PGSTEAL_KSWAPD,

		PGSTEAL_DIRECT,

		PGSCAN_KSWAPD,

mm/memory.c

+1 −0
Original line number Diff line number Diff line
@@ -2619,6 +2619,7 @@ static inline void wp_page_reuse(struct vm_fault *vmf) 
	if (ptep_set_access_flags(vma, vmf->address, vmf->pte, entry, 1))

		update_mmu_cache(vma, vmf->address, vmf->pte);

	pte_unmap_unlock(vmf->pte, vmf->ptl);

	count_vm_event(PGREUSE);

}



/*

mm/vmstat.c

+1 −0
Original line number Diff line number Diff line
@@ -1198,6 +1198,7 @@ const char * const vmstat_text[] = { 
	"pglazyfreed",



	"pgrefill",

	"pgreuse",

	"pgsteal_kswapd",

	"pgsteal_direct",

	"pgscan_kswapd",