* percentages of the lru and ageable caches. This should balance the seeks
* generated by these structures.
*
- * If the vm encounted mapped pages on the LRU it increase the pressure on
+ * If the vm encountered mapped pages on the LRU it increase the pressure on
* slab to avoid swapping.
*
* We do weird things to avoid (scanned*seeks*entries) overflowing 32 bits.
unsigned long nr_to_scan;
unsigned long nr_reclaimed = 0;
- zone_set_flag(zone, ZONE_RECLAIM_LOCKED);
-
/*
* Add one to `nr_to_scan' just to make sure that the kernel will
* slowly sift through the active list.
}
throttle_vm_writeout(sc->gfp_mask);
-
- zone_clear_flag(zone, ZONE_RECLAIM_LOCKED);
return nr_reclaimed;
}
*/
if (priority < 0)
priority = 0;
- for (i = 0; zones[i] != 0; i++) {
+ for (i = 0; zones[i] != NULL; i++) {
struct zone *zone = zones[i];
if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))
int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
{
int node_id;
+ int ret;
/*
* Zone reclaim reclaims unmapped file backed pages and
<= zone->min_slab_pages)
return 0;
+ if (zone_is_all_unreclaimable(zone))
+ return 0;
+
/*
- * Avoid concurrent zone reclaims, do not reclaim in a zone that does
- * not have reclaimable pages and if we should not delay the allocation
- * then do not scan.
+ * Do not scan if the allocation should not be delayed.
*/
- if (!(gfp_mask & __GFP_WAIT) || zone_is_all_unreclaimable(zone) ||
- zone_is_reclaim_locked(zone) || (current->flags & PF_MEMALLOC))
+ if (!(gfp_mask & __GFP_WAIT) || (current->flags & PF_MEMALLOC))
return 0;
/*
node_id = zone_to_nid(zone);
if (node_state(node_id, N_CPU) && node_id != numa_node_id())
return 0;
- return __zone_reclaim(zone, gfp_mask, order);
+
+ if (zone_test_and_set_flag(zone, ZONE_RECLAIM_LOCKED))
+ return 0;
+ ret = __zone_reclaim(zone, gfp_mask, order);
+ zone_clear_flag(zone, ZONE_RECLAIM_LOCKED);
+
+ return ret;
}
#endif