The patch titled
Subject: mm, vmstat: calculate particular vm event
has been added to the -mm tree. Its filename is
mm-vmstat-calculate-particular-vm-event.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-vmstat-calculate-particular-vm-event.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-vmstat-calculate-particular-vm-event.patch
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From: Ebru Akagunduz <ebru.akagunduz@xxxxxxxxx>
Subject: mm, vmstat: calculate particular vm event
Currently, vmstat can calculate a specific vm event with all_vm_events()
however it calculates all vm events at a time. This patch introduces a
new function to calculate only single event at a time.
Signed-off-by: Ebru Akagunduz <ebru.akagunduz@xxxxxxxxx>
Suggested-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/vmstat.h | 6 ++++++
mm/vmstat.c | 12 ++++++++++++
2 files changed, 18 insertions(+)
diff -puN include/linux/vmstat.h~mm-vmstat-calculate-particular-vm-event include/linux/vmstat.h
--- a/include/linux/vmstat.h~mm-vmstat-calculate-particular-vm-event
+++ a/include/linux/vmstat.h
@@ -53,6 +53,8 @@ static inline void count_vm_events(enum
extern void all_vm_events(unsigned long *);
+extern unsigned long sum_vm_event(enum vm_event_item item);
+
extern void vm_events_fold_cpu(int cpu);
#else
@@ -73,6 +75,10 @@ static inline void __count_vm_events(enu
static inline void all_vm_events(unsigned long *ret)
{
}
+static inline unsigned long sum_vm_event(enum vm_event_item item)
+{
+ return 0;
+}
static inline void vm_events_fold_cpu(int cpu)
{
}
diff -puN mm/vmstat.c~mm-vmstat-calculate-particular-vm-event mm/vmstat.c
--- a/mm/vmstat.c~mm-vmstat-calculate-particular-vm-event
+++ a/mm/vmstat.c
@@ -34,6 +34,18 @@
DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}};
EXPORT_PER_CPU_SYMBOL(vm_event_states);
+unsigned long sum_vm_event(enum vm_event_item item)
+{
+ int cpu;
+ unsigned long ret = 0;
+
+ get_online_cpus();
+ for_each_online_cpu(cpu)
+ ret += per_cpu(vm_event_states, cpu).event[item];
+ put_online_cpus();
+ return ret;
+}
+
static void sum_vm_events(unsigned long *ret)
{
int cpu;
_
Patches currently in -mm which might be from ebru.akagunduz@xxxxxxxxx are
mm-make-optimistic-check-for-swapin-readahead.patch
mm-make-swapin-readahead-to-improve-thp-collapse-rate.patch
mm-vmstat-calculate-particular-vm-event.patch
mm-thp-avoid-unnecessary-swapin-in-khugepaged.patch
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