lkml.org 
[lkml]   [2001]   [Aug]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectusb-uhci + SMP -> bad
On Tue, Aug 14, 2001 at 01:48:06PM +0100, Alan Cox wrote:

> > - use the uhci USB driver when I'm using a USB printer. If I
> > use the usb-uhci driver with my USB printer, the whole system
> > locks. This has been reported a few times on LKML,
> > linux-usb-users, and linux-usb-developers and nobody helped,
> > but a few people wrote back with "me too"s. It was broken in
> > the trasnition from 2.4.3 to 2.4.4 and only seems to affect
> > SMP systems. I just gave up on USB printing and went back to
> > my parallel port.
>
> usb-uhci seems to not be SMP safe. Ultimately we don't need both uhci
> drivers so that hasnt been one that worried me. Probably we should drop
> the other uhci driver over time (2.5 maybe)

i'd just thought i'd verify that usb-uchi seems to be causing
some havoc on SMP boxes.

i've had complete crashes (Alt-SysRq-s doesn't respond) when i
try to print stuff to a USB printer using the usb-uchi and
printer modules. this is on an SMP box.

however -- 2.4.2 works perfectly for that. it broke from 2.4.4
onward (tried 2.4.[5-7], i'm presuming .8 hasn't fixed the
problem.)

if anybody wants me to help them diagnose the problem, i'd be
more than happy to, but i'm not sure where to start at the
moment.


--
#ozone/algorithm <ozone@algorithm.com.au> - trust.in.love.to.save
-
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/

\
 
 \ /
  Last update: 2005-03-22 12:57    [W:0.118 / U:0.620 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site