From mboxrd@z Thu Jan 1 00:00:00 1970 To: 9fans@cse.psu.edu Subject: Re: [9fans] RDMA: DMA over TCP/IP at IETF From: "rob pike" MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Message-Id: <20011212134632.4659619A0B@mail.cse.psu.edu> Date: Wed, 12 Dec 2001 08:46:30 -0500 Topicbox-Message-UUID: 33a64270-eaca-11e9-9e20-41e7f4b1d025 > IIRC the 'Multiprocessor sleep/wakeup' paper refers to a problem > which was discovered when a new fast device was added to Plan 9. If I recall correctly, "IIRC" is a shorthand for "if I recall correctly", and either you don't or I don't. The problem the paper addressed was a general one introduced by, er, doing sleep/wakeup on a multiprocessor. The paper is also incomplete; when notes were added to the system shortly after, it took years to get the code to its current approximation of correctness. The general approach of using a tool to help was not abandoned, however; the system just kept changing under the model. Nowadays, Holzmann's stuff is applied directly to the kernel sources, which helps a lot. -rob