>[...]
> I would think that this would be safe when using DMA, and likely to be
> safe for PIO and more recent chipsets, but I wouldn't want to actually
> tell anyone that.
A little story from OLS. I have a 486/75 laptop, which can only
do PIO. It always was losing characters evern on 9600 baud on its
serial port, and I thought it was simply broken for five years.
A guy who did a security talk showed me that doing hdparm -u
fixes the problem. Apparently, the lappy has a non-buffering UART.
So, it seems that hdparm -u is a very useful thing for obsotele
boxes. If you do DMA, you probably do not care.
-- Pete
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Tue Jul 30 2002 - 14:00:17 EST