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=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 7FF85C282C4 for ; Sat, 9 Feb 2019 18:51:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4E25F21916 for ; Sat, 9 Feb 2019 18:51:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=eikelenboom.it header.i=@eikelenboom.it header.b="kyDIqzsy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728254AbfBIStx (ORCPT ); Sat, 9 Feb 2019 13:49:53 -0500 Received: from server.eikelenboom.it ([91.121.65.215]:47530 "EHLO server.eikelenboom.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728210AbfBIStp (ORCPT ); Sat, 9 Feb 2019 13:49:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=eikelenboom.it; s=20180706; h=Content-Transfer-Encoding:Content-Type: In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To:Subject:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Sq/gOVvgxP7lx7MAR6Fw6A6M85ThCs5LxdB8sVN8QSY=; b=kyDIqzsyLbo3rPeUo7mLdyyqBP y7A2dvLz6xJb4oW05A7RNBiJnF0Sk40Dq4bY5yZ00+26mj7UCuG5qrH6gecc0n+FfRkF1ynBrJuPM gpgQezKUpOYd4QxJpFwHU05cYPDhALoXfvyRa3InoQmX4D1ogrYcXWWiuSQw1u9mrsQg=; Received: from ip4da85049.direct-adsl.nl ([77.168.80.73]:50588 helo=[172.16.1.50]) by server.eikelenboom.it with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1gsXhH-0007xQ-R8; Sat, 09 Feb 2019 19:49:51 +0100 Subject: Re: Linux 5.0 regression: BUG: unable to handle kernel paging request at ffff888023e26778 RIP: e030:move_page_tables+0x7c1/0xae0 To: Juergen Gross , Linus Torvalds , Boris Ostrovsky Cc: linux-kernel , "xen-devel@lists.xenproject.org" , "Joel Fernandes (Google)" References: <39ae9195-cf8f-01fe-df83-38a9a4c52e48@eikelenboom.it> <094e923b-4e64-57d8-42c4-6e8890473035@suse.com> From: Sander Eikelenboom Message-ID: <3be0ee8f-79d4-2a2f-59a5-71f3514d9dbd@eikelenboom.it> Date: Sat, 9 Feb 2019 19:51:18 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <094e923b-4e64-57d8-42c4-6e8890473035@suse.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/02/2019 19:48, Juergen Gross wrote: > On 09/02/2019 19:45, Sander Eikelenboom wrote: >> On 09/02/2019 09:26, Sander Eikelenboom wrote: >>> L.S., >>> >>> >>> While testing a Linux 5.0-rc5-ish kernel (pull of yesterday) with some additional patches for >>> already reported other issues i came across the issue below which i haven't seen with 4.20.x >>> >>> I haven't got a reproducer so i might be hard to hit it again, >>> system is AMD and this is from the host kernel running under >>> the Xen hypervisor might it matter. >> >>> -- >>> >>> Sander >> >> Hi Boris / Juergen, >> >> The commit causing this is: >> 2c91bd4a4e2e530582d6fd643ea7b86b27907151 mm: speed up mremap by 20x on large regions >> >> Since it seems there haven't been any other reports about this .. >> could it be this doesn't specifically work well with a Xen PVH dom0 ? > > PVH? Not PV? Ah sorry, indeed PV ! > > Juergen >