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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 07D10C433EF for ; Thu, 19 May 2022 20:58:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244927AbiESU6H (ORCPT ); Thu, 19 May 2022 16:58:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244902AbiESU6C (ORCPT ); Thu, 19 May 2022 16:58:02 -0400 Received: from alexa-out-sd-02.qualcomm.com (alexa-out-sd-02.qualcomm.com [199.106.114.39]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37B41EC3D1 for ; Thu, 19 May 2022 13:58:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1652993880; x=1684529880; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=u0Oy9BNZh8dXJmknsxZwwxQLExu6lgBD77SlAD1vJO8=; b=vxdx+VWy9SsfWcHsctIt+ru159asf4YzuE0XWKWB09c0G8tgCvCsxrH5 WWR0xFhHqpk1FVy6DzEXz+u/TD87Y9xr8lbenOpEwSe5+wQR4kMFG2jrc RwvwWmrzk+VZFGny0DIk+zGVbRoLpNVKRnV37LVFzmKU+/tyXJpkJiaez o=; Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-02.qualcomm.com with ESMTP; 19 May 2022 13:57:59 -0700 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg04-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 May 2022 13:57:59 -0700 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Thu, 19 May 2022 13:57:59 -0700 Received: from qian (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Thu, 19 May 2022 13:57:57 -0700 Date: Thu, 19 May 2022 16:57:55 -0400 From: Qian Cai To: Zi Yan CC: David Hildenbrand , , , , Vlastimil Babka , Mel Gorman , Eric Ren , Mike Rapoport , "Oscar Salvador" , Christophe Leroy , Andrew Morton Subject: Re: [PATCH v11 0/6] Use pageblock_order for cma and alloc_contig_range alignment. Message-ID: References: <20220425143118.2850746-1-zi.yan@sent.com> <20220426201855.GA1014@qian> <20220426210801.GA1038@qian> <2B9844C8-6D35-41E2-ACB2-9854E7A9C29F@nvidia.com> <20220427132720.GC71@qian> <1D88AE1B-4DFC-400F-A054-662E3824C9AF@nvidia.com> <20220428123308.GA71@qian> <0E75B247-8150-48A3-83AE-56C586030006@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <0E75B247-8150-48A3-83AE-56C586030006@nvidia.com> X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 28, 2022 at 08:39:06AM -0400, Zi Yan wrote: > How about the one attached? I can apply it to next-20220428. Let me know > if you are using a different branch. Thanks. Zi, it turns out that the endless loop in isolate_single_pageblock() can still be reproduced on today's linux-next tree by running the reproducer a few times. With this debug patch applied, it keeps printing the same values. --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -399,6 +399,8 @@ static int isolate_single_pageblock(unsigned long boundary_pfn, gfp_t gfp_flags, }; INIT_LIST_HEAD(&cc.migratepages); + printk_ratelimited("KK stucked pfn=%lu head_pfn=%lu nr_pages=%lu boundary_pfn=%lu\n", pfn, head_pfn, nr_pages, boundary_pfn); ret = __alloc_contig_migrate_range(&cc, head_pfn, head_pfn + nr_pages); isolate_single_pageblock: 179 callbacks suppressed KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896 KK stucked pfn=2151120384 head_pfn=2151120384 nr_pages=512 boundary_pfn=2151120896