Date: Wed, 15 Jan 2003 13:06:15 +0300 (MSK) From: Igor Sysoev <is@rambler-co.ru> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: arch@FreeBSD.ORG Subject: Re: getsysfd() patch #1 (Re: Virtual memory question) Message-ID: <Pine.BSF.4.21.0301151236260.31202-100000@is> In-Reply-To: <200301150316.h0F3GIe8005442@apollo.backplane.com>
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On Tue, 14 Jan 2003, Matthew Dillon wrote: > Communication between kernel and userland could use a VM Object like > this... consider kqueue and AIO operation that does not require copying > to and from userspace. Instead you implement a message queue with a > shared VM object and tell the kernel to go. This would allow a bunch of > I/O and/or kqueue requests to be collected together and then initiated > with a single system call, and events could be reported back on a > different VM Object. > > (just brainstorming). Last Linux kernels introduced epoll (small subset of kqueue with EV_CLEAR flag): http://www.xmailserver.org/linux-patches/nio-improve.html It uses mmap()ed area to get event array. Igor Sysoev http://sysoev.ru/en/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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