From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gui Jianfeng Subject: Re: [PATCH -mm 0/6] cgroup: block device i/o controller (v11) Date: Mon, 03 Nov 2008 15:01:08 +0800 Message-ID: <490EA1B4.9070600@cn.fujitsu.com> References: <> <1223373818-13687-1-git-send-email-righi.andrea@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1223373818-13687-1-git-send-email-righi.andrea-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Andrea Righi Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: containers.vger.kernel.org Hi Andrea, I'v tested io-throttle(v11), it seems io-throttle doesn't work well when a process writes(delay-write) a small file(<50M may be). it can't throttle the request process accurately. I guess the following reason causes this problem. The write-request process terminates too early to see all accounting calculated in pdflush. So io-throttle can't throttle enough time for that process. Am i right? -- Regards Gui Jianfeng