> > So - is anyone else having problems with ISA DMA cards in 2.1.125 ?
>
> No but the Z85230 driver which has similar properties in its DMA use always
> has a bounce buffer handy, as does every other driver I know. They grab
> a bounce buffer at set up time and hold onto it
Roger Wolff corrected me on this one as well. He wrote the driver, so
he knows better than I:
Roger>For transmit buffers, there is also an escape route. It will use the
Roger>one emergency buffer allocated at ifconfig-up time as a jump-buffer.
Roger>If no below-16M buffers can be found, it will use this one, and again
Roger>the driver will become single threaded. But as far as I can see, it
Roger>should only suffer a bit in the performance region, it should not
Roger>be possible to lock the machine.
So I think the driver is already doing this.
--
Henrik Storner | "testing? What's that? If it compiles, it is good,
| if it boots up it is perfect."
| Linus Torvalds
-
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/