Re: Perform minimal RAM test at boot

Jamie Lokier (lkd@tantalophile.demon.co.uk)
Wed, 3 Nov 1999 22:33:53 +0100

Messages sorted by: [ date ][ thread ][ subject ][ author ]
Next message: Petr Vandrovec: "[PATCH] ncpfs mmap #2 (vm_pgoff overflow) (was Re: [PATCH] fbmem.c ... )"
Previous message: Martin Mares: "Re: Specifying properly the PCI driver model on all linux archite ctur es, (ioremap(), bus_to_virt()"

Jan Echternach wrote:
> IIRC it used a slightly different method: Read byte, write 0x55 and test,
> write 0xaa and test, write back old byte.

This is not good enough even for detecting PC memory. What if:

- The address wraps (locations alias)
- Some address lines aren't decoded (same thing)

-- Jamie

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

Next message: Petr Vandrovec: "[PATCH] ncpfs mmap #2 (vm_pgoff overflow) (was Re: [PATCH] fbmem.c ... )"
Previous message: Martin Mares: "Re: Specifying properly the PCI driver model on all linux archite ctur es, (ioremap(), bus_to_virt()"