From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Monta Date: Mon, 23 Aug 1999 17:42:05 +0000 Subject: Re: Streaming disk I/O kills file buffering and makes Linux unusable Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sound@vger.kernel.org > > I agree; the raw-io system will make this much more pleasant. > > Why do you think so? > > IO is IO, whether it is raw or not. And it will eat up resources from > everybody else trying to do IO. True; raw I/O won't magically increase resources. But it offers a valuable way to tell the kernel something it can't know/infer: a good buffering policy for streaming data. The existing cache mechanism for normal I/O works fine but is inappropriate for this case; indeed perfectly good working sets are messed up by buffering the streaming data, as Benno points out. Cheers, Peter