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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 9D7A1C76190 for ; Fri, 26 Jul 2019 11:51:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 73A94229F3 for ; Fri, 26 Jul 2019 11:51:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726787AbfGZLvT (ORCPT ); Fri, 26 Jul 2019 07:51:19 -0400 Received: from mail-qt1-f195.google.com ([209.85.160.195]:42725 "EHLO mail-qt1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726604AbfGZLvS (ORCPT ); Fri, 26 Jul 2019 07:51:18 -0400 Received: by mail-qt1-f195.google.com with SMTP id h18so52261378qtm.9 for ; Fri, 26 Jul 2019 04:51:18 -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:mime-version :content-disposition; bh=9gHO9TyKSj0CYwPdw5b5x4szapbbJYZPZ0dkycmRYIw=; b=Lz+s1aFtzaCKwZvoXyQO5kTnZqyxG5Km3oSJi3o2fV/RSZ9KJ/W8VFqh1fHbPR69pJ 0DxCzExQ8Ik0jbL6zvWbk0XbxBOAqL66kkTrtpUYYSbTBe/ZDcanl4IQz9Ls7may3P66 mCVOEnWAC5i8r8/ak/utUb9ahKVhPm+tMrd0tgKM+evPLnO3RBa31ib4LV9ILS4W4opa rrzHz95pBcokxjI8oeNHOhLpU2Yvq+xUlZPn7qKxV0CWJbvqhOMcP/6Za1/KDA90lgZE OLEyF/j5dz0V4QOSArWTfWtqEpiHc1zjwMht/63USIxUuEPxEv/Olk9gnT6vPGGiY15e zwPw== X-Gm-Message-State: APjAAAXLtOt3Qtu3crLCLatI0Cm/bZ3diyOxeD9Ia4mc2PlAQ/V0j+yv VE2QQQPfWND+xrQmONCMw3GPY741mtbr2Ywp X-Google-Smtp-Source: APXvYqymcbOMEQ4lUl13pE8Gi7ZsmsaJk9G/++ds4UPazH2mBxi16XyvfrDkgsSarz23FJllDH4Qvg== X-Received: by 2002:ac8:520e:: with SMTP id r14mr65932257qtn.50.1564141877674; Fri, 26 Jul 2019 04:51:17 -0700 (PDT) Received: from redhat.com ([212.92.104.165]) by smtp.gmail.com with ESMTPSA id 39sm28940576qts.41.2019.07.26.04.51.15 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 26 Jul 2019 04:51:16 -0700 (PDT) Date: Fri, 26 Jul 2019 07:51:12 -0400 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: Jason Wang , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org Subject: [PATCH] vhost: disable metadata prefetch optimization Message-ID: <20190726115021.7319-1-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Mailer: git-send-email 2.22.0.678.g13338e74b8 X-Mutt-Fcc: =sent Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This seems to cause guest and host memory corruption. Disable for now until we get a better handle on that. Signed-off-by: Michael S. Tsirkin --- I put this in linux-next, we'll re-enable if we can fix the outstanding issues in a short order. drivers/vhost/vhost.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 819296332913..42a8c2a13ab1 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -96,7 +96,7 @@ struct vhost_uaddr { }; #if defined(CONFIG_MMU_NOTIFIER) && ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 0 -#define VHOST_ARCH_CAN_ACCEL_UACCESS 1 +#define VHOST_ARCH_CAN_ACCEL_UACCESS 0 #else #define VHOST_ARCH_CAN_ACCEL_UACCESS 0 #endif -- MST