From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25ADDC43441 for ; Mon, 26 Nov 2018 08:17:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E2DE621104 for ; Mon, 26 Nov 2018 08:17:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E2DE621104 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726425AbeKZTKz (ORCPT ); Mon, 26 Nov 2018 14:10:55 -0500 Received: from mx2.suse.de ([195.135.220.15]:57322 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726199AbeKZTKy (ORCPT ); Mon, 26 Nov 2018 14:10:54 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id DFB4FAF3C; Mon, 26 Nov 2018 08:17:32 +0000 (UTC) Date: Mon, 26 Nov 2018 09:17:32 +0100 Message-ID: From: Takashi Iwai To: kernel test robot Cc: Takashi Sakamoto , LKML , alsa-devel@alsa-project.org, lkp@01.org Subject: Re: [LKP] [ALSA] 3a6d1980fe: kernel_BUG_at_mm/page_alloc.c In-Reply-To: <20181126002805.GI18977@shao2-debian> References: <20181126002805.GI18977@shao2-debian> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/26 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 26 Nov 2018 01:28:05 +0100, kernel test robot wrote: > > FYI, we noticed the following commit (built with gcc-7): > > commit: 3a6d1980fe96dbbfe3ae58db0048867f5319cdbf ("ALSA: Replace snd_malloc_pages() and snd_free_pages() with standard helpers") > https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git for-next .... > [ 174.830284] kernel BUG at mm/page_alloc.c:2850! OK, this seem to be an issue about using __GFP_COMP and alloc_pages_exact(). I didn't hit this while testing locally maybe just because I used the buffer size in power-of-two casually. I dropped the patch until we sort this out. thanks, Takashi