From patchwork Mon Mar 7 19:25:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 8521821 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 2227B9F46A for ; Mon, 7 Mar 2016 19:30:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 823CA202AE for ; Mon, 7 Mar 2016 19:30:18 +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 D66132027D for ; Mon, 7 Mar 2016 19:30:17 +0000 (UTC) Received: from localhost ([::1]:57921 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ad0rB-0003A6-3e for patchwork-qemu-devel@patchwork.kernel.org; Mon, 07 Mar 2016 14:30:17 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44582) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ad0n6-00041o-0H for qemu-devel@nongnu.org; Mon, 07 Mar 2016 14:26:05 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ad0n3-0003tV-3B for qemu-devel@nongnu.org; Mon, 07 Mar 2016 14:26:03 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36280) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ad0n2-0003tH-V2 for qemu-devel@nongnu.org; Mon, 07 Mar 2016 14:26:01 -0500 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id A0133C00FBD4; Mon, 7 Mar 2016 19:25:59 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-116-61.ams2.redhat.com [10.36.116.61]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u27JPvGb015401 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 7 Mar 2016 14:25:59 -0500 Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 76139300184F; Mon, 7 Mar 2016 20:25:55 +0100 (CET) From: Markus Armbruster To: qemu-devel@nongnu.org Date: Mon, 7 Mar 2016 20:25:18 +0100 Message-Id: <1457378754-21649-7-git-send-email-armbru@redhat.com> In-Reply-To: <1457378754-21649-1-git-send-email-armbru@redhat.com> References: <1457378754-21649-1-git-send-email-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 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 v2 06/42] 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