From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <20080719133256.868625855@jp.fujitsu.com> References: <20080719132615.228311215@jp.fujitsu.com> Date: Sat, 19 Jul 2008 22:26:16 +0900 From: kosaki.motohiro@jp.fujitsu.com Subject: [PATCH 1/3] introduce get_vm_event() Content-Disposition: inline; filename=02-get_vm_event.patch Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: kosaki.motohiro@jp.fujitsu.com, Rik van Riel List-ID: changelog ======================================== v7 -> v8 o no change v6 -> v7 o get_vm_stat: make cpu-unplug safety. v5 -> v6 o created introduce get_vm_event() new function for easy use vm statics. Signed-off-by: KOSAKI Motohiro Acked-by: Rik van Riel --- include/linux/vmstat.h | 7 ++++++- mm/vmstat.c | 16 ++++++++++++++++ 2 files changed, 22 insertions(+), 1 deletion(-) Index: b/include/linux/vmstat.h =================================================================== --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -108,6 +108,8 @@ static inline void vm_events_fold_cpu(in } #endif +unsigned long get_vm_event(enum vm_event_item event_type); + #else /* Disable counters */ @@ -129,7 +131,10 @@ static inline void all_vm_events(unsigne static inline void vm_events_fold_cpu(int cpu) { } - +static inline unsigned long get_vm_event(enum vm_event_item event_type) +{ + return 0; +} #endif /* CONFIG_VM_EVENT_COUNTERS */ #define __count_zone_vm_events(item, zone, delta) \ Index: b/mm/vmstat.c =================================================================== --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -49,6 +49,22 @@ void all_vm_events(unsigned long *ret) } EXPORT_SYMBOL_GPL(all_vm_events); +unsigned long get_vm_event(enum vm_event_item event_type) +{ + int cpu; + unsigned long ret = 0; + + get_online_cpus(); + for_each_online_cpu(cpu) { + struct vm_event_state *this = &per_cpu(vm_event_states, cpu); + + ret += this->event[event_type]; + } + put_online_cpus(); + + return ret; +} + #ifdef CONFIG_HOTPLUG /* * Fold the foreign cpu events into our own. -- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org