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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1288FEB64DC for ; Mon, 3 Jul 2023 10:28:57 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qGGnD-0007lS-Ba; Mon, 03 Jul 2023 06:28:27 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qGGnC-0007km-8A; Mon, 03 Jul 2023 06:28:26 -0400 Received: from fanzine2.igalia.com ([213.97.179.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qGGnA-0003ay-MJ; Mon, 03 Jul 2023 06:28:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Type:MIME-Version:Message-ID:Date:References: In-Reply-To:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: 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=lxIhcft7DjeeYdpJuo7xmPldHscY4lupYWZ+VXIMa5g=; b=Mz/4nptl1NwxItOq0uFB7OD3k6 ew1fylyR2rdrOPOusljkRjCwYsw7yJCaZe3b402U/9apbJvZ2U7HiPBcAkofCGTzXywvnm2JtNH7e 4y+XSF7Nb+D/7rXNZzI+lA2hodlrcQeg3jdMg/wtOxfXwgO6Fjzo05Qo3yIQoPb3ZuLLhl/viceNx eUY3DckLC6QlI0rdvLm7fl1akS9fyvjVcn46EqxPn/Fv63qjyrBERU7yhQcw7RXslA1DqrFlVmmqs k0/XF6HUgx6902dkMrdmGohjjMDBimgriImsf/V6FoCwzJR0M4HpzArMZdZsKR5yun4pN9NIszAv4 aIqDyTKg==; Received: from maestria.local.igalia.com ([192.168.10.14] helo=mail.igalia.com) by fanzine2.igalia.com with esmtps (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1qGGn7-007Zug-RF; Mon, 03 Jul 2023 12:28:21 +0200 Received: from gate.service.igalia.com ([192.168.21.52]) by mail.igalia.com with esmtp (Exim) id 1qGGn5-002H6K-ML; Mon, 03 Jul 2023 12:28:21 +0200 Received: from berto by gate.service.igalia.com with local (Exim 4.94.2) (envelope-from ) id 1qGGn5-00BG76-3T; Mon, 03 Jul 2023 10:28:19 +0000 From: Alberto Garcia To: zhenwei pi Cc: arei.gonglei@huawei.com, qemu-devel@nongnu.org, qemu-block@nongnu.org, berrange@redhat.com, zhenwei pi Subject: Re: [PATCH v2 3/5] throttle: support read-only and write-only In-Reply-To: <20230627072431.449171-4-pizhenwei@bytedance.com> References: <20230627072431.449171-1-pizhenwei@bytedance.com> <20230627072431.449171-4-pizhenwei@bytedance.com> Date: Mon, 03 Jul 2023 10:28:19 +0000 Message-ID: MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=213.97.179.56; envelope-from=berto@igalia.com; helo=fanzine2.igalia.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Tue 27 Jun 2023 03:24:29 PM +08, zhenwei pi wrote: > Only one direction is necessary in several scenarios: > - a read-only disk > - operations on a device are considered as *write* only. For example, > encrypt/decrypt/sign/verify operations on a cryptodev use a single > *write* timer(read timer callback is defined, but never invoked). > > Allow a single direction in throttle, this reduces memory, and uplayer > does not need a dummy callback any more. > > Signed-off-by: zhenwei pi Reviewed-by: Alberto Garcia Berto