From owner-freebsd-hackers@FreeBSD.ORG Fri Jan 22 14:46:56 2010 Return-Path: Delivered-To: hackers@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8BDFB106566C; Fri, 22 Jan 2010 14:46:56 +0000 (UTC) (envelope-from rrs@lakerest.net) Received: from lakerest.net (unknown [IPv6:2001:240:585:2:213:d4ff:fef3:2d8d]) by mx1.freebsd.org (Postfix) with ESMTP id 205768FC15; Fri, 22 Jan 2010 14:46:56 +0000 (UTC) Received: from [192.168.2.144] (pool-96-238-218-31.snfcca.dsl-w.verizon.net [96.238.218.31]) (authenticated bits=0) by lakerest.net (8.14.3/8.14.3) with ESMTP id o0MEkqLj090930 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Fri, 22 Jan 2010 09:46:54 -0500 (EST) (envelope-from rrs@lakerest.net) Message-Id: <5DEC2B2B-0823-420B-B064-32D5B0731E37@lakerest.net> From: Randall Stewart To: Randall Stewart In-Reply-To: <24C6E6AA-0D67-448F-87A6-1536211EE595@lakerest.net> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v936) Date: Fri, 22 Jan 2010 06:46:46 -0800 References: <9bbcef731001220527u5bbec479n59143b6631c6e2d8@mail.gmail.com> <24C6E6AA-0D67-448F-87A6-1536211EE595@lakerest.net> X-Mailer: Apple Mail (2.936) Cc: hackers@FreeBSD.org, Ivan Voras Subject: Re: Greetings... a patch I would like your comments on... X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Jan 2010 14:46:56 -0000 Lets try that again with the right email subscribed to hackers ;-) R On Jan 22, 2010, at 6:43 AM, Randall Stewart wrote: > Ivan: > > Ok, over we go ;-) > > I do want to add this into Head here eventually so if you happen > to have an interest in umtx or kqueue you may want to take a close > look at this patch ;-) > > R > On Jan 22, 2010, at 5:27 AM, Ivan Voras wrote: > >> 2010/1/22 Randall Stewart : >>> All: >>> >>> I have put together a patch against head that I would like >>> your opinion of. >>> >>> So first what does it do? >>> >>> Well one thing I thought lacking in the kernel was the ability >>> to send a cond event (umtx_cond) to a thread that was waiting >>> on a kqueue... >>> >>> So the rough idea is I have N fd's and other things I am watching >>> but I would also like a local thread (maybe remote if the >>> umtx_cond_t is >>> in shared memory) to be able to wake me up as well. >> >> This is a good and useful addition! I think Windows has implemented a >> generalization of this (called "wait objects" or something like >> that), >> which effectively allows a select()- (or in this case kqueue())-like >> syscall to wait on both file descriptors and condvars (as well as >> probably other MS-style objects). It's useful for multiplexing events >> for dissimilar sources. >> >> But you will probably soon receive a message to take this discussion >> to hackers@freebsd.org, and I agree :) >> > > ------------------------------ > Randall Stewart > 803-317-4952 (cell) > 803-345-0391(direct) > ------------------------------ Randall Stewart 803-317-4952 (cell) 803-345-0391(direct)