From mboxrd@z Thu Jan 1 00:00:00 1970 From: Don Dugger Date: Fri, 09 Feb 2001 20:01:45 +0000 Subject: Re: [Linux-ia64] TODO list 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-ia64@vger.kernel.org It also isn't as easy to do as you might think. We were looking into this at one time and you have to be really carefull about stack management because you can wind up running in kernel mode with a user stack pointer. This would cause serious problems when an interrupt comes in. On Fri, Feb 09, 2001 at 11:42:09AM -0800, David Mosberger wrote: > >>>>> On Fri, 09 Feb 2001 14:14:18 -0500, Jun Nakajima said: > > Jun> Do we want to support epc-based system calls? I know some other > Jun> IA-64 OS uses that mechanism. I'm not sure how much perfermance > Jun> gain we can get by that in Linux, though. > > That's certainly something I'm interested in investigating. It's not > nearly as obvious a win as it may seem at first, so it's something that > needs to be looked at carefully. > > In any case, this would be something for 2.5.x, so I don't think we > should clutter the current TODO list with such things (there are LOTS > of other performance related things we can do...). > > --david > > _______________________________________________ > Linux-IA64 mailing list > Linux-IA64@linuxia64.org > http://lists.linuxia64.org/lists/listinfo/linux-ia64 -- Don Dugger "Censeo Toto nos in Kansa esse decisse." - D. Gale n0ano@valinux.com Ph: 303/938-9838