From patchwork Mon Feb 29 18:40:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 8456991 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7AC1C9F2F0 for ; Mon, 29 Feb 2016 18:41:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7735D201F2 for ; Mon, 29 Feb 2016 18:41:15 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CE9C7201E4 for ; Mon, 29 Feb 2016 18:41:14 +0000 (UTC) Received: from localhost ([::1]:38360 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaSkr-0001yl-QL for patchwork-qemu-devel@patchwork.kernel.org; Mon, 29 Feb 2016 13:41:13 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59582) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaSke-0001yC-Ta for qemu-devel@nongnu.org; Mon, 29 Feb 2016 13:41:02 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aaSkb-0007jm-Jk for qemu-devel@nongnu.org; Mon, 29 Feb 2016 13:41:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37333) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaSkb-0007jc-EJ for qemu-devel@nongnu.org; Mon, 29 Feb 2016 13:40:57 -0500 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id C8C68804E2; Mon, 29 Feb 2016 18:40:56 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-116-22.ams2.redhat.com [10.36.116.22]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u1TIesgM004175 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 29 Feb 2016 13:40:56 -0500 Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 3931F303E59A; Mon, 29 Feb 2016 19:40:54 +0100 (CET) From: Markus Armbruster To: qemu-devel@nongnu.org Date: Mon, 29 Feb 2016 19:40:18 +0100 Message-Id: <1456771254-17511-3-git-send-email-armbru@redhat.com> In-Reply-To: <1456771254-17511-1-git-send-email-armbru@redhat.com> References: <1456771254-17511-1-git-send-email-armbru@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: claudio.fontana@huawei.com, cam@cs.ualberta.ca, mlureau@redhat.com, david.marchand@6wind.com, pbonzini@redhat.com Subject: [Qemu-devel] [PATCH 02/38] qemu-doc: Fix ivshmem huge page example X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Option parameter "share" is missing. Without it, you get a *private* mmap(), which defeats ivshmem's purpose pretty thoroughly ;) While there, switch to the conventional mountpoint of hugetlbfs /dev/hugepages. Signed-off-by: Markus Armbruster Reviewed-by: Marc-André Lureau Reviewed-by: Paolo Bonzini --- qemu-doc.texi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/qemu-doc.texi b/qemu-doc.texi index bc9dd13..65f3b29 100644 --- a/qemu-doc.texi +++ b/qemu-doc.texi @@ -1311,7 +1311,7 @@ Instead of specifying the using POSIX shm, you may specify a memory backend that has hugepage support: @example -qemu-system-i386 -object memory-backend-file,size=1G,mem-path=/mnt/hugepages/my-shmem-file,id=mb1 +qemu-system-i386 -object memory-backend-file,size=1G,mem-path=/dev/hugepages/my-shmem-file,share,id=mb1 -device ivshmem,x-memdev=mb1 @end example