Bartlomiej Zolnierkiewicz wrote: {
> >
> >>On 7/4/05, Al Boldi <[EMAIL PROTECTED]> wrote:
> >>Hdparm -tT gives 38mb/s in 2.4.31
> >>Cat /dev/hda > /dev/null gives 2% user 33% sys 65% idle
> >>
> >>Hdparm -tT gives 28mb/s in 2.6.12
> >>Cat /dev/hda > /dev/null gives 2% user 25% sys 0% idle 73% IOWAIT
> >>
> >>It feels like DMA is not being applied properly in 2.6.12.
> >
> > Same on 2.6.10,11,12.
> > No errors though, only sluggish system.What about earlier kernels? Please try to narrow down the problem to a specific kernel version. } Don't know about 2.6.0-2.6.9, but 2.4.31 is ok. Bartlomiej, When you compare 2.4.31 with 2.6.12 don't you see this problem on your machine? If you have a fast system the slowdown won't show, but your IOWAIT will be higher anyway! It feels like running on PIO instead of DMA. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
