On Wed, 16 Mar 2011, Julian Elischer wrote:
On 3/16/11 2:16 PM, Ivan Voras wrote:
On 16 March 2011 21:03, Erik Trulsson<ertr1...@student.uu.se> wrote:
On Wed, Mar 16, 2011 at 06:45:53PM +0100, Roman Divacky wrote:
On Wed, Mar 16, 2011 at 12:32:56PM -0400, Jung-uk Kim wrote:
On Tuesday 15 March 2011 08:45 pm, Maxim Dounin wrote:
This isn't really different as long as GENERIC kernel used, as
GENERIC defines I486_CPU.
Fixed in r219698, sorry.
Actually, I think we should remove i486 from GENERIC at some point.
It has too many limitations. For example, I really love to implement
atomic 64-bit mem read/write using cmpxchg8b (no 0xf00f joke, please)
but I cannot do that cleanly without removing I486 support or
checking cpu_class at run-time. :-(
if we drop i486 I think it makes sense to require something that has
at least SSE2, thus we can have the same expectations as on amd64.
No, that would remove support from far too many machines that people
actually use to run FreeBSD.
There are probably only a handful of people (if that) who actually run
FreeBSD on an actual 486-class machine, but requiring SSE2 would mean
dropping support for Pentium-III and Athlon-XP equipped machines and
I believe there are a large number of such machines still in use, and
they are still perfectly suitable for a large number of tasks.
This is understandable but I also think it deserves a poll at stable@
and current@. It might be worth keeping i486 for all of 9-stable but
removing it before 10-stable. Judging from previous releases, 9.x
would be supported until at least 2016. I don't follow the embedded
world that much, but from what I saw, most (incl. Soekris) are moving
to Atom designs which support SSE2.
not sure what is in the Soekris and other embedded machines but do keep them
in mind.
many are now 586 class I guess but there may still be some 486 ones around.
I believe you can now get a 486 core in some arrays.
You mean something like this .. though it's not a fully classic? It's
one of the soekris boxes I boot/run as long as I manage to get a
kernel and a world in an mdimage booted from tftp... yes you can still
get down to that tiny size though there's a lot of ignorance for that
in our tree these days.
CPU: AMD Enhanced Am486DX4/Am5x86 Write-Back (486-class CPU)
Origin = "AuthenticAMD" Id = 0x494 Stepping = 4
Features=0x1<FPU>
real memory = 33554432 (32 MB)
/bz
--
Bjoern A. Zeeb You have to have visions!
Stop bit received. Insert coin for new address family.
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