Messages in this thread |  | | Date | Fri, 11 May 2001 01:02:53 -0300 | From | Ralf Baechle <> | Subject | Re: Athlon possible fixes |
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On Sun, May 06, 2001 at 01:51:59PM +0100, Alan Cox wrote:
> > There really needs to be a hardware fix... this doesn't stop some > > application having it's owne optimised code from breaking on some > > hardware (think games and similation software perhaps). > > prefetch is virtually addresses. An application would need access to /dev/mem > or similar. So the only folks I think it might actually bite are the Xserver > people.
Prefetch bugs in hardware have biten Linux/68k as early as '94; a GVP SCSI HBA on the Amiga may touch areas beyond the last valid RAM address when doing DMA to the last page. Being a burned child from that time Linux/MIPS didn't use the last RAM page just to be on the safe side.
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