diff options
Diffstat (limited to '')
| -rw-r--r-- | include/linux/vm_event_item.h | 4 | ||||
| -rw-r--r-- | mm/swap_state.c | 9 | ||||
| -rw-r--r-- | mm/vmstat.c | 4 |
3 files changed, 15 insertions, 2 deletions
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index e02820fc2861..d77bc35278b0 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -106,6 +106,10 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, VMACACHE_FIND_HITS, VMACACHE_FULL_FLUSHES, #endif +#ifdef CONFIG_SWAP + SWAP_RA, + SWAP_RA_HIT, +#endif NR_VM_EVENT_ITEMS }; diff --git a/mm/swap_state.c b/mm/swap_state.c index b68c93014f50..d1bdb31cab13 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -305,8 +305,10 @@ struct page * lookup_swap_cache(swp_entry_t entry) if (page && likely(!PageTransCompound(page))) { INC_CACHE_INFO(find_success); - if (TestClearPageReadahead(page)) + if (TestClearPageReadahead(page)) { atomic_inc(&swapin_readahead_hits); + count_vm_event(SWAP_RA_HIT); + } } INC_CACHE_INFO(find_total); @@ -516,8 +518,11 @@ struct page *swapin_readahead(swp_entry_t entry, gfp_t gfp_mask, gfp_mask, vma, addr, false); if (!page) continue; - if (offset != entry_offset && likely(!PageTransCompound(page))) + if (offset != entry_offset && + likely(!PageTransCompound(page))) { SetPageReadahead(page); + count_vm_event(SWAP_RA); + } put_page(page); } blk_finish_plug(&plug); diff --git a/mm/vmstat.c b/mm/vmstat.c index 85f3a2e04adc..c7e4b8458023 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1098,6 +1098,10 @@ const char * const vmstat_text[] = { "vmacache_find_hits", "vmacache_full_flushes", #endif +#ifdef CONFIG_SWAP + "swap_ra", + "swap_ra_hit", +#endif #endif /* CONFIG_VM_EVENTS_COUNTERS */ }; #endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA */ |