Messages in this thread | | | Subject | Re: Direct access to hardware | From | Krzysztof Halasa <> | Date | 25 Jul 2000 23:58:55 +0200 |
| |
James Sutherland <jas88@cam.ac.uk> writes:
> On Tue, 25 Jul 2000, Stuart MacDonald wrote: > > > Which is exactly the point. The hard drives should be checking for > > invalid ATA commands in hardware, right in the drive, preventing > > damage from bad commands. Putting a filter into the kernel is not > > the right fix. > > As with some of the Intel CPU bugs, the problem is NOT "invalid ATA > commands" - it's a matter of VALID commands which are dangerous. FDIV on > early Pentiums isn't an invalid instruction - it just produces the wrong > results at times. So the SOFTWARE must do something to avoid this - either > that, or you need to replace the hardware, which isn't desirable. You do > something in the OS to prevent these problem commands being used.
So what does the kernel (can) do to prevent this problem on defective pentiums? -- Krzysztof Halasa Network Administrator
- 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/
| |