Helmut Toplitzer wrote:
Rene: Could you please try this out?
Yes, but please note I don't have a VIA southbridge (an AMD756), only
the VIA VT6212L EHCI controller. I commented the
#if defined(CONFIG_BLK_DEV_VIA82CXXX)
bit.
I'm currently working with it and it looks good.
Transfer rate is at 57MB and cooler goes down after
booting.
Unfortunately, this all does absolutely nothing for me:
$ dmesg | grep VIA
DISABLE VIA HLT activated
hdparm -t /dev/hda = 50 MB/s
1. modprobe ehci-hcd hdparm -t /dev/hda = 50 MB/s
2. switch on USB2 drive hdparm -t /dev/hda = 42 MB/s
3. switch off USB2 drive hdparm -t /dev/hda = 42 MB/s
4. modprobe -r ehci-hcd hdparm -t /dev/hda = 50 MB/s
Ie, same as before. Also tried the "setpci" statements for AMD751 (and
athcool) as described on the link you posted:
http://www.daniel.nofftz.net/linux/Athlon-Powersaving-HOWTO.html
My machine boots up with the powersaving feauture already disabled. When
I enable it, I
a) hear my PSU calming down, confirming that it works
b) see the (non-ehci loaded) hdparm result drop from 50 to 45
c) lose at least my NIC, a few times all of the computer
That is, the system becomes very unstable. In any case, there is no
effect on the ehci-hcd/vt6216l issue either. If I load ehci-hcd and
switch on the USB2 drive when the powersaving is disabled, then I
a) hear the PSU going full speed again, confirming that something's
being very busy there
b) see the hdparm result drop to the exact same 42MB/s
c) am lucky to have a non-frozen computer at this point
The c) is just the instability. The point is -- no effecf on this issue
at all.
I believe we can conclude that it's confirmed that you and I weren't
experiencing the same problem after all. I feel so alone again...
I do find it interesting that I hear the PSU foing to full again on
switching on the external drive if I had lowered it by disabling the
powersaving. This would seem to prove that, indeed, something is being
_very_ busy there. Earlier, I have confirmed that there's really no
driver -> controller communication going on at this point (and no
interrupts controller -> driver) though.
Yes, I dislike VIA, and I'm probably just paranoid, but I so much would
put it _not_ past those <censored> to do whatever they do on purpose, so
that the chip's faster to the bus when it _does_ actually have something
to do.
Many thanks for the ideas, but I'm still out of luck, it seems.
Rene.
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