diff options
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 30 |
1 files changed, 13 insertions, 17 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index b4d109e389b8..3984c4eb41fd 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -284,6 +284,13 @@ struct zone { unsigned long watermark[NR_WMARK]; /* + * When free pages are below this point, additional steps are taken + * when reading the number of free pages to avoid per-cpu counter + * drift allowing watermarks to be breached + */ + unsigned long percpu_drift_mark; + + /* * We don't know if the memory that we're going to allocate will be freeable * or/and it will be released eventually, so to avoid totally wasting several * GB of ram we must reserve some of the lower zone memory (otherwise we risk @@ -348,21 +355,6 @@ struct zone { atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; /* - * prev_priority holds the scanning priority for this zone. It is - * defined as the scanning priority at which we achieved our reclaim - * target at the previous try_to_free_pages() or balance_pgdat() - * invocation. - * - * We use prev_priority as a measure of how much stress page reclaim is - * under - it drives the swappiness decision: whether to unmap mapped - * pages. - * - * Access to both this field is quite racy even on uniprocessor. But - * it is expected to average out OK. - */ - int prev_priority; - - /* * The target ratio of ACTIVE_ANON to INACTIVE_ANON pages on * this zone's LRU. Maintained by the pageout code. */ @@ -456,6 +448,12 @@ static inline int zone_is_oom_locked(const struct zone *zone) return test_bit(ZONE_OOM_LOCKED, &zone->flags); } +#ifdef CONFIG_SMP +unsigned long zone_nr_free_pages(struct zone *zone); +#else +#define zone_nr_free_pages(zone) zone_page_state(zone, NR_FREE_PAGES) +#endif /* CONFIG_SMP */ + /* * The "priority" of VM scanning is how much of the queues we will scan in one * go. A value of 12 for DEF_PRIORITY implies that we will scan 1/4096th of the @@ -651,8 +649,6 @@ typedef struct pglist_data { #include <linux/memory_hotplug.h> extern struct mutex zonelists_mutex; -void get_zone_counts(unsigned long *active, unsigned long *inactive, - unsigned long *free); void build_all_zonelists(void *data); void wakeup_kswapd(struct zone *zone, int order); int zone_watermark_ok(struct zone *z, int order, unsigned long mark, |