From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx143.postini.com [74.125.245.143]) by kanga.kvack.org (Postfix) with SMTP id 4401F6B0044 for ; Tue, 24 Apr 2012 01:18:57 -0400 (EDT) Received: from m4.gw.fujitsu.co.jp (unknown [10.0.50.74]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 5BB803EE0BC for ; Tue, 24 Apr 2012 14:18:55 +0900 (JST) Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 412D345DE4D for ; Tue, 24 Apr 2012 14:18:55 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 2925645DE4F for ; Tue, 24 Apr 2012 14:18:55 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 1AD8D1DB8042 for ; Tue, 24 Apr 2012 14:18:55 +0900 (JST) Received: from ml13.s.css.fujitsu.com (ml13.s.css.fujitsu.com [10.240.81.133]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id CAE101DB803F for ; Tue, 24 Apr 2012 14:18:54 +0900 (JST) Message-ID: <4F963742.2030607@jp.fujitsu.com> Date: Tue, 24 Apr 2012 14:16:50 +0900 From: KAMEZAWA Hiroyuki MIME-Version: 1.0 Subject: Re: [RFC] propagate gfp_t to page table alloc functions References: <1335171318-4838-1-git-send-email-minchan@kernel.org> In-Reply-To: <1335171318-4838-1-git-send-email-minchan@kernel.org> Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Minchan Kim Cc: Andrew Morton , Ingo Molnar , x86@kernel.org, Hugh Dickins , Johannes Weiner , Rik van Riel , Mel Gorman , kosaki.motohiro@jp.fujitsu.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org (2012/04/23 17:55), Minchan Kim wrote: > As I test some code, I found a problem about deadlock by lockdep. > The reason I saw the message is __vmalloc calls map_vm_area which calls > pud/pmd_alloc without gfp_t. so although we call __vmalloc with > GFP_ATOMIC or GFP_NOIO, it ends up allocating pages with GFP_KERNEL. > The should be a BUG. This patch fixes it by passing gfp_to to low page > table allocate functions. > > Signed-off-by: Minchan Kim Hmm ? vmalloc should support GFP_ATOMIC ? And, do we need to change all pud_,pgd_,pmd_,pte_alloc() for users pgtables ? Thanks, -Kame -- 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