smp 13xx kernels with hung processes.

[Anne & Lynn Wheeler]

 > Try specifying the kernel parameter "usb-handoff" and see if that
 > helps .... it's kind of like disabling usb-legacy but from the kernel
 > side ...

well i've tried nearly every smp 13xx kernel on poweredge 2400 (1gbyte 
memory, two 1ghz pentiums originally shipped with redhat 7 installed) 
that doesn't have any usb devices ... and they all had hung processes of 
one sort or antoher. problems disappear regressing to smp kernel 1276 
and the problems disappear.

tried 1366 kernel still same problems of one sort or another. after new 
x distribution ... x related processes seem to have less problem ... but 
there still were hang problems with processes that did network i/o.

i tried selecting bios that completely turns usb off ... and rebooted
1366 several times and still problem (I even used hardware browse ... 
and it doesn't even show usb controller of any kind).

i tried also setting usb-handoff on kernel boot line for smp kernel 
1366. no difference (i wouldn't think it would make a lot of difference 
since there weren't any usb devices and bios turning usb off also didn't 
make any difference).