From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx125.postini.com [74.125.245.125]) by kanga.kvack.org (Postfix) with SMTP id 58D6F8D0003 for ; Tue, 15 Jan 2013 19:26:19 -0500 (EST) Received: from /spool/local by e7.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 15 Jan 2013 19:26:18 -0500 Received: from d01relay07.pok.ibm.com (d01relay07.pok.ibm.com [9.56.227.147]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 204CA38C804F for ; Tue, 15 Jan 2013 19:25:57 -0500 (EST) Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay07.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r0G0Pulm65667232 for ; Tue, 15 Jan 2013 19:25:56 -0500 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r0G0PtPf000810 for ; Tue, 15 Jan 2013 22:25:56 -0200 From: Cody P Schafer Subject: [PATCH 15/17] mm/page_alloc: add informative debugging message in page_outside_zone_boundaries() Date: Tue, 15 Jan 2013 16:24:52 -0800 Message-Id: <1358295894-24167-16-git-send-email-cody@linux.vnet.ibm.com> In-Reply-To: <1358295894-24167-1-git-send-email-cody@linux.vnet.ibm.com> References: <1358295894-24167-1-git-send-email-cody@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Linux MM Cc: LKML , Andrew Morton , Catalin Marinas , Cody P Schafer Add a debug message which prints when a page is found outside of the boundaries of the zone it should belong to. Format is: "page $pfn outside zone [ $start_pfn - $end_pfn ]" Signed-off-by: Cody P Schafer --- mm/page_alloc.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index f8ed277..f1783cf 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -239,13 +239,20 @@ static int page_outside_zone_boundaries(struct zone *zone, struct page *page) int ret = 0; unsigned seq; unsigned long pfn = page_to_pfn(page); + unsigned long sp, start_pfn; do { seq = zone_span_seqbegin(zone); + start_pfn = zone->zone_start_pfn; + sp = zone->spanned_pages; if (!zone_spans_pfn(zone, pfn)) ret = 1; } while (zone_span_seqretry(zone, seq)); + if (ret) + pr_debug("page %lu outside zone [ %lu - %lu ]\n", + pfn, start_pfn, start_pfn + sp); + return ret; } -- 1.8.0.3 -- 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