diff options
| -rw-r--r-- | include/linux/vmstat.h | 5 | ||||
| -rw-r--r-- | mm/vmscan.c | 6 | ||||
| -rw-r--r-- | mm/vmstat.c | 5 |
3 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index ff5179f2b153..135840cd7feb 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -41,6 +41,11 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, #ifdef CONFIG_HUGETLB_PAGE HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, #endif +#ifdef CONFIG_UNEVICTABLE_LRU + UNEVICTABLE_PGCULLED, /* culled to noreclaim list */ + UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */ + UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */ +#endif NR_VM_EVENT_ITEMS }; diff --git a/mm/vmscan.c b/mm/vmscan.c index 154b9b608da6..2804d23e2da7 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -484,6 +484,7 @@ void putback_lru_page(struct page *page) { int lru; int active = !!TestClearPageActive(page); + int was_unevictable = PageUnevictable(page); VM_BUG_ON(PageLRU(page)); @@ -525,6 +526,11 @@ redo: */ } + if (was_unevictable && lru != LRU_UNEVICTABLE) + count_vm_event(UNEVICTABLE_PGRESCUED); + else if (!was_unevictable && lru == LRU_UNEVICTABLE) + count_vm_event(UNEVICTABLE_PGCULLED); + put_page(page); /* drop ref from isolate */ } diff --git a/mm/vmstat.c b/mm/vmstat.c index 4380b0dba6d9..6cb08cdd4f03 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -677,6 +677,11 @@ static const char * const vmstat_text[] = { "htlb_buddy_alloc_success", "htlb_buddy_alloc_fail", #endif +#ifdef CONFIG_UNEVICTABLE_LRU + "unevictable_pgs_culled", + "unevictable_pgs_scanned", + "unevictable_pgs_rescued", +#endif #endif }; |