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=-8.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 7FF92C433E6 for ; Wed, 2 Sep 2020 08:18:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5ED042084C for ; Wed, 2 Sep 2020 08:18:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599034727; bh=7+JEzktISsgTMdUzuapRscBPtX4N6Y3wMNOli4jVPQ4=; h=Date:From:To:cc:Subject:In-Reply-To:References:List-ID:From; b=noARdsJn4c4IsYEKCX7+9PhOaCGF0nP1HchpKpqAO7HULTMHC6kHHy/TqDkLgODb0 ZpX+z8IMmCswEb+daxTjzAKpKOIxvX6WjoQEi5NHZ6lHrNwCcghQv01JiLka9vtA62 lX24D8kY3+8qzFw+g393fU5l/zuRTgkMRji2hlPA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726791AbgIBISm (ORCPT ); Wed, 2 Sep 2020 04:18:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:39108 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726310AbgIBISl (ORCPT ); Wed, 2 Sep 2020 04:18:41 -0400 Received: from pobox.suse.cz (nat1.prg.suse.com [195.250.132.148]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BADA92084C; Wed, 2 Sep 2020 08:18:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599034720; bh=7+JEzktISsgTMdUzuapRscBPtX4N6Y3wMNOli4jVPQ4=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=AUuruMhNnTWN9d+oIWMoSqWA8+m8sBM+oeWPLsiObVeHFiq7BNSvIvN4IuQjBGrUN k+B+5u9HrYhoRwTH/Os1qWGB1TXIiwzK1gOw6wV1fQkR0xWwE/1B4a4FZP7bKSHIC9 PP5dp0UkLkUuQvkHkcTKYHlSgMUgvsrGj9E2u+Z4= Date: Wed, 2 Sep 2020 10:18:35 +0200 (CEST) From: Jiri Kosina To: Boqun Feng cc: linux-hyperv@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Benjamin Tissoires , Dmitry Torokhov , "David S. Miller" , Jakub Kicinski , "James E.J. Bottomley" , "Martin K. Petersen" , Michael Kelley Subject: Re: [RFC v2 09/11] HID: hyperv: Make ringbuffer at least take two pages In-Reply-To: <20200902030107.33380-10-boqun.feng@gmail.com> Message-ID: References: <20200902030107.33380-1-boqun.feng@gmail.com> <20200902030107.33380-10-boqun.feng@gmail.com> User-Agent: Alpine 2.21 (LSU 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Wed, 2 Sep 2020, Boqun Feng wrote: > When PAGE_SIZE > HV_HYP_PAGE_SIZE, we need the ringbuffer size to be at > least 2 * PAGE_SIZE: one page for the header and at least one page of > the data part (because of the alignment requirement for double mapping). > > So make sure the ringbuffer sizes to be at least 2 * PAGE_SIZE when > using vmbus_open() to establish the vmbus connection. > > Signed-off-by: Boqun Feng Acked-by: Jiri Kosina -- Jiri Kosina SUSE Labs