lkml.org 
[lkml]   [1997]   [Apr]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.0.30 reboots with cyrix.pl2.patch
On Tue, 22 Apr 1997, Joseph W. Breu wrote:

> processor : 0
> cpu : 586
> model : 6x86 2x Core/Bus Clock
> vendor_id : CyrixInstead
> stepping : 2 rev 2
> [...]
> After the Uncompressing the kernel... it reboots.
> [...]
> I am not sure if the VSPM is causing this because my chip is a
> step that doesn't have the L1 broken and has the VSPM (I think?)..

If you use VSPM on a system with a non-power of two memory size
the current patch gets the kernel page tables wrong and crashes.

It is also extremely likely that the step 2 chips have completely
different sets of bugs in the VSPM handling (the step 1 revisions
are all different...). Cyrix appear not to document such changes
and are unable to answer technical questions about their chips.
Last I heard my questions were going to be passed down to the
engineers but that was *months* ago. I wouldn't recommend trying
VSPM on anything other than step 1 rev 4-7 unless you are willing
to invest the time to figure out what Cyrix can't/won't tell you :-).

N.B. I believe the M2 will have Pentium 4MB page capabilities
(which, being a compatibility issue, probably means they'll want
it to *work*). What that means for the future of VSPM I don't know.

Mike

--
.----------------------------------------------------------------------.
| Mike Jagdis | Internet: mailto:mike@roan.co.uk |
| Roan Technology Ltd. | |
| 54A Peach Street, Wokingham | Telephone: +44 118 989 0403 |
| RG40 1XG, ENGLAND | Fax: +44 118 989 1195 |
`----------------------------------------------------------------------'


\
 
 \ /
  Last update: 2005-03-22 13:39    [W:0.049 / U:0.804 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site