Messages in this thread | | | Date | Sat, 25 Sep 1999 15:01:26 -0700 (PDT) | From | "Mr. James W. Laferriere" <> | Subject | Re: sym53c875E-0: PCI clock seems too high |
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Hello Gerard,
On Sat, 25 Sep 1999, Gerard Roudier wrote: > The test of the PCI clock is not intended to prevent user from stupidly > breaking their hardware, but some reality test to prevent the driver from > being wrong about its estimation of the SCSI clock of the chip. Applying > the algorithm to the PCI bus and checking the result against the expected > reality (33Mhz), allows to make sure the algorithm is correct. This > algorithm is based on the udelay() stuff of Linux that sometimes may give > weird results, especially on new hardware, and then break the driver > calculation of the SCSI clock. I understand your concerns and agree .
> I will NOT remove the reality test of the PCI clock, but allow user to > tell the driver about the reality they choose for the PCI clock frequency. > This will be a boot command option that will be defaulted to 33 MHz. > Probably something like : pciclk=41 to inform the driver about the PCI BUS > being clocked to 41 MHz. I thank you very much . Not that I over-clock anything I own , a few people I know do . It would be nice if these individuals would first return their systems to an in-spec clock-rate & then try duplicate the problem they were experiencing & then if it is reproducable send out a query to a list .
> I actually donnot care of people who overclock their hardware. I just ask > them for not wasting our time with problems due to their decision to > overclock. These people must know that hardware that have been overclocked > can be definitely damaged and experience far more error than specs said.
> Overcloking a CPU that is in fact sold with an underclocked specification > is one thing. I've heard of some re-seller/Oem doing this but not with any of my oem contacts . I haven't heard any names of re-seller/Oem 's that do this just a few discussions with disgruntled owners who found this to have been done to them .
>Overclocking a BUS and then everything that connect to it by > more than 10% was not imaginable by me. By the way, I think that people > that overclock PCI 33 Mhz buses up to 41MHz or more are just foolish and > plain idiot, but I don't care of them. Total agreement ! Tnx, JimL +-----------------------------------------------------------------+ | James W. Laferriere | System Techniques | Give me VMS | | Network Engineer | 25416 22nd So | Give me Linux | | babydr@baby-dragons.com | DesMoines WA 98198 | only on AXP | +-----------------------------------------------------------------+
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