From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <20071030160910.537350000@chello.nl> References: <20071030160401.296770000@chello.nl> Date: Tue, 30 Oct 2007 17:04:03 +0100 From: Peter Zijlstra Subject: [PATCH 02/33] mm: tag reseve pages Content-Disposition: inline; filename=page_alloc-reserve.patch Sender: owner-linux-mm@kvack.org Return-Path: To: Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, trond.myklebust@fys.uio.no Cc: Peter Zijlstra List-ID: 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 @@ -70,6 +70,7 @@ 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 @@ -1448,8 +1448,10 @@ 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org