Messages in this thread | | | From | Con Kolivas <> | Subject | Re: 2.6.x Scheduler, preemption and responsiveness - puzzlement | Date | Mon, 12 Jul 2004 11:57:42 +1000 |
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Sid Boyce writes:
> Nuno Monteiro wrote: > >> >> On 2004.07.11 23:55, Sid Boyce wrote: >> >>> I've been wondering why this is, I can't remember what the BIOS says >>> about the hard drives, from memory it looked OK, I think it was set to >> >> >> <snip snip> >> >>> PCI IDE nVidia Corporation nForce2 IDE (rev a2) >> >> >> <snip snip> >> >>> # CONFIG_BLK_DEV_AMD74XX is not set >> >> >> You don't have the driver for your IDE chipset compiled in. In the >> "ATA/ ATAPI/MFM/RLL support" under "Device Drivers" menu select "AMD >> and nVidia IDE support". Also, you can disable the "Generic PCI IDE >> Chipset Support" and the "VIA82CXXX chipset support" you seem to have >> enabled. >> >> Then you should be able to do DMA, and things will go a lot faster. >> >> >> Hope this helps. >> >> >> >> Nuno > > Oops!, thanks. The previous motherboard used the VIA chipset, so that > got missed when I changed over. > Regards > Sid.
DMA disabled is perhaps the most common reason for poor performance under I/O loads. I think some cut down configurations that people have used from their 2.4 installations have missed the appropriate IDE driver.
Cheers, Con [unhandled content-type:application/pgp-signature] | |