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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7F4CC433F5 for ; Tue, 8 Feb 2022 18:49:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1385490AbiBHStY (ORCPT ); Tue, 8 Feb 2022 13:49:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1385487AbiBHStN (ORCPT ); Tue, 8 Feb 2022 13:49:13 -0500 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3652AC0612B8; Tue, 8 Feb 2022 10:49:13 -0800 (PST) Received: by mail-pl1-x631.google.com with SMTP id 10so147054plj.1; Tue, 08 Feb 2022 10:49:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=HzqJzWy6/gVejSAN5h5m+QbHqL8I+Ih3BBbS9yeEwMQ=; b=N4MKN8A1dy9x/0fQ3O5ZkWlr8CY4zUnafoD5iZJ2GzR2vHrPtZ9c3Augj8QVTK/AOB 6/Q0T9TxM0VSWHm37lP2a4E0TiBrzrW1EhYPumJszYBdF7eUpgZwahZdkzXGgG8+uijN EmyFn0npWdJy1OTjwf8aZ/+9k7emBiOHVNUqPcClPbMfn2VqEkoBj+u0tEthGor79MHU Q+YzcmqT/YYt5W56qTcPGLmXCR1cUCzJMQ48WnZQUTxPcgO02slV04kbISsKtoFvVS58 LCwvTK7xcTi0/LT7PubbSs8+5waC1a9C1PTTqMm+3ZHp1Zz7rUdlBA27X4l7qSY3SA+s X3fw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=HzqJzWy6/gVejSAN5h5m+QbHqL8I+Ih3BBbS9yeEwMQ=; b=hwvykU9bmAc/p0UI6F9n1Ejt1CydCGSwo4r6zeHykeC9a3PFFxCWHwqT4XNl1fXiKf TXfICQVb92wYwEoLIGkH6zs6F3zjtQR/19VgTW3lIxbGYA8LdegUV5J3+Kmz0/8NzOmr br5coWkjh1fGYTExJYhS8jGtk6j2uo1F0Xi1fKkK38NL9ktJdrAJkstKcxRKgsA7DnvB Qp5ntZk4G41xBrO9igCnLY2MvzSdc/INJ2ZJjhZsBtHxdrAOXeoOghYYggVSbOlR6G5I ivebrghptl3lrY+/kZxEm09xZ9aGoF5t9VO6LgFlV6EMJ1XbBT3bKifNGYQZFmtlF2V2 bxjw== X-Gm-Message-State: AOAM530kv13r38qx43OTWIZb1/vYAu6uIQbUid4QNZUbaeM1QCviUAe/ ipZ8S4d23dDa2ydhUKUicb4= X-Google-Smtp-Source: ABdhPJwX12I2MBOXbiu6oZugVdwTIBUKqfSF8p3wK6Ebq2mwkYOwoYeKHHg4Oha5uOUJ0yedv0L0SQ== X-Received: by 2002:a17:902:e788:: with SMTP id cp8mr6038172plb.172.1644346152598; Tue, 08 Feb 2022 10:49:12 -0800 (PST) Received: from localhost (2603-800c-1a02-1bae-e24f-43ff-fee6-449f.res6.spectrum.com. [2603:800c:1a02:1bae:e24f:43ff:fee6:449f]) by smtp.gmail.com with ESMTPSA id kb18sm3983061pjb.30.2022.02.08.10.49.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Feb 2022 10:49:12 -0800 (PST) Sender: Tejun Heo Date: Tue, 8 Feb 2022 08:49:11 -1000 From: Tejun Heo To: "yukuai (C)" Cc: axboe@kernel.dk, cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, yi.zhang@huawei.com Subject: Re: [PATCH -next] blk-throttle: enable io throttle for root in cgroup v2 Message-ID: References: <20220114093000.3323470-1-yukuai3@huawei.com> <235b0757-d322-2b6e-3ab6-ecc8c82f8f1e@huawei.com> <32b6949d-60b1-82ce-ae44-1cf089a78276@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <32b6949d-60b1-82ce-ae44-1cf089a78276@huawei.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Tue, Feb 08, 2022 at 09:38:33AM +0800, yukuai (C) wrote: > 3) If we limit iops to 8 for each client from server, client should work > fine, however, server can receive 64 x 8 = 512 io at most at the same > time, which might cause too much pressure on the server.(maybe bps is > more appropriate to explain the high pressure). I don't follow this part. Why can't the server control however it wanna control? Thanks. -- tejun