Hi Ingo,
I wanted to give you a bug report about yout PIII patch, using the new
FXSAVE/FXRESTOR instructions of the PIII (and PII-Deschutes), which are
supposed to be a little bit faster.
Your patch for 2.2.2 from Mar 2 causes problems for both 2.2.2-ac7 and
2.2.5-ac3(+devfs) on my Dual PII (deschutes) box.=20
Symptoms:=20
* My multithreaded numerical benchmark fails (seemingly random NANs)
* KDE crashes X crashes the console on logging out
So I guess, the patched kernel does not correctly save and retore the FP
registers. Debugging suggests, that this is what actually happens.
I reversed the patch on my 2.2.5-ac3 kernel and the problems have
disappeared, now.
Just wanted to let you know. In case there is a more recent version of the
patch to try, please let me know.
--=20
Dipl.Phys. Kurt Garloff <kurt@garloff.de> [Wuppertal, FRG]
Plasma physics, high perf. computing [Linux-ix86,-axp, DUX]
PGP key: see mailheader / key servers [Linux SCSI driver: DC390]
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