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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 D4915C433E1 for ; Wed, 8 Jul 2020 06:45:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA6F4206E2 for ; Wed, 8 Jul 2020 06:45:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594190729; bh=SPRIsKOmLPNjH3oXsx8+5rCbOj9PU4cPW3+Y5hYJXUg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=1DSqVwwRT1GAjvAoAMKdgyTmIFrrkPXXg5SJZwYxUwhOgxKFQsfbDu3qJ1/aypeXf veQy5rWwPrcAJQ23k8cE/bT6+u8iqk8jNaZJyUV5xLR02JiY+V5KHtFnlWrMYqkbS8 EgVbib6WOQ7+Ht8X3xFyNcbWEepmgJcr+01drH8o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729810AbgGHGp2 (ORCPT ); Wed, 8 Jul 2020 02:45:28 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:46010 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726171AbgGHGp2 (ORCPT ); Wed, 8 Jul 2020 02:45:28 -0400 Received: by mail-wr1-f68.google.com with SMTP id s10so47586453wrw.12 for ; Tue, 07 Jul 2020 23:45:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=kTz766jrS9kLMaLLgdH0q1srs9gRA5HbwAQdKRecpe8=; b=L0UK9y1Nt8ACuZAUQBFhEyz6qt1rEbaIA8Z12AoFjhVSv+lk6v9zfcwjDQpCKaayaj CJeLSXOAuJnAJjC5acOzkU13pEtYj5aMMlGGrrvJ7rc4zLBHGYFq2b20cyRIwH6+lbrk DVlsizOF4vCCyXWQ+t0KTpOgCNMjeObZUtqI2Is+0HvjVSCvlQF91Kz9Lh+5ag+mzPVd LH1uP9tdiMwpmqZ0ZKVz3XWKKTeKFm50LenOpKqEVLYOYNbEKd0VDOEJavGM/vL4tFeS GxJuSQaeDA20zzqv6kDmvfUHB0tbQM5ccSfoabeUr09+U85WoX2um6N1yMDw/r5bwTYx eynA== X-Gm-Message-State: AOAM530uDCNnwLq8KzpdZvwaHYnIs1c8nwkUOSrTUZSeBKk2BFjGRnC6 UY2p6Mzf9P1vzuNHbRyjWt2Oiram X-Google-Smtp-Source: ABdhPJy8zVhJlQAscGLs009kKGfNYnLK/DzOEwXA0PD9XYTGtNiXApHOU2S0+TIDsPJIvfKwiKeZNQ== X-Received: by 2002:a05:6000:1182:: with SMTP id g2mr53285426wrx.44.1594190726440; Tue, 07 Jul 2020 23:45:26 -0700 (PDT) Received: from localhost (ip-37-188-179-51.eurotel.cz. [37.188.179.51]) by smtp.gmail.com with ESMTPSA id 207sm5144885wme.13.2020.07.07.23.45.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jul 2020 23:45:25 -0700 (PDT) Date: Wed, 8 Jul 2020 08:45:24 +0200 From: Michal Hocko To: Qian Cai Cc: js1304@gmail.com, Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@lge.com, Vlastimil Babka , Christoph Hellwig , Roman Gushchin , Mike Kravetz , Naoya Horiguchi , Joonsoo Kim Subject: Re: [PATCH v3 7/8] mm/mempolicy: use a standard migration target allocation callback Message-ID: <20200708064524.GA7271@dhcp22.suse.cz> References: <1592892828-1934-1-git-send-email-iamjoonsoo.kim@lge.com> <1592892828-1934-8-git-send-email-iamjoonsoo.kim@lge.com> <20200708012044.GC992@lca.pw> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200708012044.GC992@lca.pw> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 07-07-20 21:20:44, Qian Cai wrote: [...] > migrate_pages() starts failing like this apparently using the new > callback on NUMA systems, > > [ 6147.019063][T45242] LTP: starting move_pages12 > [ 6147.475680][T64921] BUG: unable to handle page fault for address: ffffffffffffffe0 Hmm, this looks like -EPIPE (-32) which is unexpected to say the least. Does the test pass without this patch applied? Also there has been v4 posted just yesterday. Does it suffer from the same problem? -- Michal Hocko SUSE Labs