Date: Mon, 03 Mar 2014 19:50:11 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Justin Hibbits <jhibbits@freebsd.org> Cc: freebsd-arch@freebsd.org Subject: Re: newcons fb driver Message-ID: <60475.1393876211@critter.freebsd.dk> In-Reply-To: <CAHSQbTBTq6EKD_crn=rvbeUcAEBn7E%2B=U8wRHeqchazF1LhjwQ@mail.gmail.com> References: <42130.1393829535@critter.freebsd.dk> <5314B2A2.3060100@pix.net> <CAHSQbTBTq6EKD_crn=rvbeUcAEBn7E%2B=U8wRHeqchazF1LhjwQ@mail.gmail.com>
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In message <CAHSQbTBTq6EKD_crn=rvbeUcAEBn7E+=U8wRHeqchazF1LhjwQ@mail.gmail.com> , Justin Hibbits writes: >On Mon, Mar 3, 2014 at 8:49 AM, Kurt Lidl <lidl@pix.net> wrote: >All great knowledge, but really only answers half of what I'm looking >for (always good to know potential pitfalls). Assuming a >tunable/sysctl is added, what's the best way to optimize from my >original post? Use a backing buffer (potentially with a tunable to >not)? Or assume we don't support background images, and write the >background color in the masked pixels? You should probably drop sos@ aka Søren Schmidt an email, he did syscons and has 10+ years experience in this stuff. One advantage of a backing buffer is that you can implement things like the 1000 line scroll buffer syscons did etc, I personally use that a lot to see dmesg output etc. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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