Date: Mon, 30 Mar 2009 14:28:22 +0200 From: Joerg Sonnenberger <joerg@britannica.bec.de> To: freebsd-hackers@freebsd.org Subject: Re: Improving the kernel/i386 timecounter performance (GSoC proposal) Message-ID: <20090330122821.GA1391@britannica.bec.de> In-Reply-To: <9969.1238398362@critter.freebsd.dk> References: <20090329180745.GB38985@server.vk2pj.dyndns.org> <9969.1238398362@critter.freebsd.dk>
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On Mon, Mar 30, 2009 at 07:32:42AM +0000, Poul-Henning Kamp wrote: > On systems where the ACPI or HPET hardware can be memory-mapped, I should > be equally possible to map those read-only into userland processes. Both are IO memory and contain other data. There is also the question of how "undefined" is implemented for locked bus cycles to them... Joerg
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