[lkml]   [2006]   [Nov]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: How to go about debuging a system lockup?
On Sat, Nov 18, 2006 at 12:09:54AM +0100, Stefan Richter wrote:
> Lennart Sorensen wrote:
> > OK, I have now tried connecting with firescope to just follow the dmesg
> > buffer across firewire. Works great, until the system hangs, then
> > firescope reports that it couldn't perform the read. I wonder what part
> > of the system has to lock up for the firewire card to no longer be able
> > to read memory on the system.
> I suppose the PCI bus is no longer accessible to the chip.

Sure seems that way. Makes me wonder if somehow a PCI transfer fails,
and the PCI controller isn't aborting the transfer after a timeout
(quite likely given the timeout timer is never enabled, and whenever I
try to do so, it seems to hang the system). Time to start scoping the

Len Sorensen
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-11-20 16:25    [W:0.043 / U:1.356 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site