Messages in this thread | | | Date | Wed, 14 Apr 1999 14:03:04 +0200 | From | Kurt Garloff <> | Subject | Ingo's PIII FXSTOR patch [2 Mar] causes problems |
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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.
Symptoms: * 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.
-- 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] [unhandled content-type:application/pgp-signature] | |