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| author | Ingo Molnar <mingo@elte.hu> | 2010-10-08 09:14:51 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-08 09:15:00 +0200 |
| commit | 153db80f8cf74e8700cac96305b6c0b92918f17c (patch) | |
| tree | c2afb28e7b3f4fbf0aacd9edd39d7f895321ca0c /include/linux/vmstat.h | |
| parent | 5fd03ddab7fdbc44bfb2d183a4531c26a8dbca5a (diff) | |
| parent | cb655d0f3d57c23db51b981648e452988c0223f9 (diff) | |
Merge commit 'v2.6.36-rc7' into core/memblock
Merge reason: Update from -rc3 to -rc7.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/vmstat.h')
| -rw-r--r-- | include/linux/vmstat.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 7f43ccdc1d3..eaaea37b3b7 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -170,6 +170,28 @@ static inline unsigned long zone_page_state(struct zone *zone, return x; } +/* + * More accurate version that also considers the currently pending + * deltas. For that we need to loop over all cpus to find the current + * deltas. There is no synchronization so the result cannot be + * exactly accurate either. + */ +static inline unsigned long zone_page_state_snapshot(struct zone *zone, + enum zone_stat_item item) +{ + long x = atomic_long_read(&zone->vm_stat[item]); + +#ifdef CONFIG_SMP + int cpu; + for_each_online_cpu(cpu) + x += per_cpu_ptr(zone->pageset, cpu)->vm_stat_diff[item]; + + if (x < 0) + x = 0; +#endif + return x; +} + extern unsigned long global_reclaimable_pages(void); extern unsigned long zone_reclaimable_pages(struct zone *zone); |