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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 6677BC10F08 for ; Wed, 20 Feb 2019 23:23:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3DBF620645 for ; Wed, 20 Feb 2019 23:23:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726655AbfBTXXz (ORCPT ); Wed, 20 Feb 2019 18:23:55 -0500 Received: from mx2.cyber.ee ([193.40.6.72]:43581 "EHLO mx2.cyber.ee" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725989AbfBTXXy (ORCPT ); Wed, 20 Feb 2019 18:23:54 -0500 Subject: Re: ext4 corruption on alpha with 4.20.0-09062-gd8372ba8ce28 To: Jan Kara Cc: Matthew Wilcox , "Theodore Y. Ts'o" , linux-alpha@vger.kernel.org, LKML , linux-block@vger.kernel.org, linux-mm@kvack.org References: <1c26eab4-3277-9066-5dce-6734ca9abb96@linux.ee> <076b8b72-fab0-ea98-f32f-f48949585f9d@linux.ee> <20190216174536.GC23000@mit.edu> <20190218120209.GC20919@quack2.suse.cz> <4e015688-8633-d1a0-308b-ba2a78600544@linux.ee> <20190219132026.GA28293@quack2.suse.cz> <20190219144454.GB12668@bombadil.infradead.org> <20190220094813.GA27474@quack2.suse.cz> From: Meelis Roos Message-ID: <2381c264-92f5-db43-b6a5-8e00bd881fef@linux.ee> Date: Thu, 21 Feb 2019 01:23:50 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: <20190220094813.GA27474@quack2.suse.cz> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: et-EE Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >> First, I found out that both the problematic alphas had memory compaction and >> page migration and bounce buffers turned on, and working alphas had them off. >> >> Next, turing off these options makes the problematic alphas work. > > OK, thanks for testing! Can you narrow down whether the problem is due to > CONFIG_BOUNCE or CONFIG_MIGRATION + CONFIG_COMPACTION? These are two > completely different things so knowing where to look will help. Thanks! Tested both. Just CONFIG_MIGRATION + CONFIG_COMPACTION breaks the alpha. Just CONFIG_BOUNCE has no effect in 5 tries. -- Meelis Roos