Tag pages allocated from the reserves with a non-zero page->reserve. This allows us to distinguish and account reserve pages. Signed-off-by: Peter Zijlstra --- include/linux/mm_types.h | 1 + mm/page_alloc.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) Index: linux-2.6/include/linux/mm_types.h =================================================================== --- linux-2.6.orig/include/linux/mm_types.h +++ linux-2.6/include/linux/mm_types.h @@ -73,6 +73,7 @@ struct page { union { pgoff_t index; /* Our offset within mapping. */ void *freelist; /* SLUB: freelist req. slab lock */ + int reserve; /* page_alloc: page is a reserve page */ }; struct list_head lru; /* Pageout list, eg. active_list * protected by zone->lru_lock ! Index: linux-2.6/mm/page_alloc.c =================================================================== --- linux-2.6.orig/mm/page_alloc.c +++ linux-2.6/mm/page_alloc.c @@ -1418,8 +1418,10 @@ zonelist_scan: } page = buffered_rmqueue(zonelist, zone, order, gfp_mask); - if (page) + if (page) { + page->reserve = !!(alloc_flags & ALLOC_NO_WATERMARKS); break; + } this_zone_full: if (NUMA_BUILD) zlc_mark_zone_full(zonelist, z); -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/