Date: Sat, 18 Aug 2001 13:22:07 -0700 (PDT) From: Matthew Jacob <mjacob@feral.com> To: Christoph Hellwig <hch@caldera.de> Cc: Mike Smith <msmith@FreeBSD.ORG>, Amit Shah <amitshah@techie.com>, freebsd-arch@FreeBSD.ORG Subject: Re: threaded device drivers Message-ID: <Pine.BSF.4.21.0108181321520.59594-100000@beppo> In-Reply-To: <20010818220823.C8481@caldera.de>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, 18 Aug 2001, Christoph Hellwig wrote: > On Sat, Aug 18, 2001 at 12:56:19PM -0700, Mike Smith wrote: > > > You might want to take a look at Linux's schedule_task family of cuntions > > > (kernel/context.c) - it should be straight forward to implement for FreeBSD. > > > > But entirely unnecessary, since we can already create threads in the > > kernel, as I pointed out earlier. See the kthread* family of functions. > > I know kthread ;) The differnce is just that you need an entire > thread this way - threads are eating up far too much ressources > (e.g. kernel stack) for certain types of problems. A way to just > execute some function in user context is a very nice appropeach > for lots of the smaller stuff. Some people might also remeber > NetWare's WorkToDo's that can do this stuff combines with wait queues. The linux schedule_task functions aren't all that lightweight either. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.0108181321520.59594-100000>