From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id 836786B0087 for ; Thu, 21 Jan 2010 01:51:29 -0500 (EST) Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [PATCH 22 of 30] pmd_trans_huge migrate bugcheck Message-Id: In-Reply-To: References: Date: Thu, 21 Jan 2010 07:20:46 +0100 From: Andrea Arcangeli Sender: owner-linux-mm@kvack.org To: linux-mm@kvack.org Cc: Marcelo Tosatti , Adam Litke , Avi Kivity , Izik Eidus , Hugh Dickins , Nick Piggin , Rik van Riel , Mel Gorman , Andi Kleen , Dave Hansen , Benjamin Herrenschmidt , Ingo Molnar , Mike Travis , KAMEZAWA Hiroyuki , Christoph Lameter , Chris Wright Dave Hansen , Andrew Morton List-ID: From: Andrea Arcangeli No pmd_trans_huge should ever materialize in migration ptes areas, because try_to_unmap will split the hugepage before migration ptes are instantiated. Signed-off-by: Andrea Arcangeli --- diff --git a/mm/migrate.c b/mm/migrate.c --- a/mm/migrate.c +++ b/mm/migrate.c @@ -99,6 +99,7 @@ static int remove_migration_pte(struct p goto out; pmd = pmd_offset(pud, addr); + VM_BUG_ON(pmd_trans_huge(*pmd)); if (!pmd_present(*pmd)) goto out; -- 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