From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [PATCH -next] blk-throttle: enable io throttle for root in cgroup v2 Date: Tue, 8 Feb 2022 08:49:11 -1000 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 Return-path: 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== Sender: Tejun Heo Content-Disposition: inline In-Reply-To: <32b6949d-60b1-82ce-ae44-1cf089a78276-hv44wF8Li93QT0dZR+AlfA@public.gmane.org> List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "yukuai (C)" Cc: axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, yi.zhang-hv44wF8Li93QT0dZR+AlfA@public.gmane.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