From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with ESMTP id 420976B002D for ; Mon, 21 Nov 2011 11:52:40 -0500 (EST) Received: by bke17 with SMTP id 17so8772676bke.14 for ; Mon, 21 Nov 2011 08:52:36 -0800 (PST) Message-ID: <1321894353.10470.19.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413 From: Eric Dumazet Date: Mon, 21 Nov 2011 17:52:33 +0100 In-Reply-To: <20111121161036.GA1679@x4.trippels.de> References: <20111118085436.GC1615@x4.trippels.de> <20111118120201.GA1642@x4.trippels.de> <1321836285.30341.554.camel@debian> <20111121080554.GB1625@x4.trippels.de> <20111121082445.GD1625@x4.trippels.de> <1321866988.2552.10.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <20111121131531.GA1679@x4.trippels.de> <1321884966.10470.2.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <20111121153621.GA1678@x4.trippels.de> <1321890510.10470.11.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> <20111121161036.GA1679@x4.trippels.de> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Markus Trippelsdorf Cc: "Alex,Shi" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , Christoph Lameter , Pekka Enberg , Matt Mackall , "netdev@vger.kernel.org" , tj@kernel.org Le lundi 21 novembre 2011 A 17:10 +0100, Markus Trippelsdorf a A(C)crit : > Sure. This one happend with CONFIG_DEBUG_PAGEALLOC=y: > > [drm] Initialized radeon 2.11.0 20080528 for 0000:01:05.0 on minor 0 > loop: module loaded > ahci 0000:00:11.0: version 3.0 > ahci 0000:00:11.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 > ahci 0000:00:11.0: AHCI 0001.0100 32 slots 6 ports 3 Gbps 0x3f impl SATA mode > ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part ccc > scsi0 : ahci > scsi1 : ahci > ============================================================================= > BUG task_struct: Poison overwritten > ----------------------------------------------------------------------------- Unfortunately thats the same problem, not catched by DEBUG_PAGEALLOC because freed page is immediately reused. We should keep pages in free list longer, to have a bigger window. Hmm... Please try following patch : diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9dd443d..b8932a6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1196,7 +1196,7 @@ void free_hot_cold_page(struct page *page, int cold) } pcp = &this_cpu_ptr(zone->pageset)->pcp; - if (cold) + if (IS_ENABLED(CONFIG_DEBUG_PAGEALLOC) || cold) list_add_tail(&page->lru, &pcp->lists[migratetype]); else list_add(&page->lru, &pcp->lists[migratetype]); -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org