Subject: + vmstat-create-fold_diff.patch added to -mm tree
To: cl@xxxxxxxxx,adobriyan@xxxxxxxxx,js1304@xxxxxxxxx,kosaki.motohiro@xxxxxxxxxxxxxx,tj@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Wed, 07 Aug 2013 13:43:08 -0700
The patch titled
Subject: vmstat: create fold_diff
has been added to the -mm tree. Its filename is
vmstat-create-fold_diff.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/vmstat-create-fold_diff.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/vmstat-create-fold_diff.patch
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------------------------------------------------------
From: Christoph Lameter <cl@xxxxxxxxx>
Subject: vmstat: create fold_diff
Both functions that update global counters use the same mechanism.
Create a function that contains the common code.
Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
CC: Tejun Heo <tj@xxxxxxxxxx>
Cc: Joonsoo Kim <js1304@xxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmstat.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff -puN mm/vmstat.c~vmstat-create-fold_diff mm/vmstat.c
--- a/mm/vmstat.c~vmstat-create-fold_diff
+++ a/mm/vmstat.c
@@ -414,6 +414,15 @@ void dec_zone_page_state(struct page *pa
EXPORT_SYMBOL(dec_zone_page_state);
#endif
+static inline void fold_diff(int *diff)
+{
+ int i;
+
+ for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
+ if (diff[i])
+ atomic_long_add(diff[i], &vm_stat[i]);
+}
+
/*
* Update the zone counters for the current cpu.
*
@@ -483,10 +492,7 @@ static void refresh_cpu_vm_stats(int cpu
drain_zone_pages(zone, &p->pcp);
#endif
}
-
- for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
- if (global_diff[i])
- atomic_long_add(global_diff[i], &vm_stat[i]);
+ fold_diff(global_diff);
}
/*
@@ -516,9 +522,7 @@ void cpu_vm_stats_fold(int cpu)
}
}
- for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
- if (global_diff[i])
- atomic_long_add(global_diff[i], &vm_stat[i]);
+ fold_diff(global_diff);
}
/*
_
Patches currently in -mm which might be from cl@xxxxxxxxx are
vmstat-create-separate-function-to-fold-per-cpu-diffs-into-local-counters.patch
vmstat-create-fold_diff.patch
vmstat-use-this_cpu-to-avoid-irqon-off-sequence-in-refresh_cpu_vm_stats.patch
linux-next.patch
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