>-----Original Message----- >From: linux-pm-bounces at lists.osdl.org [mailto:linux-pm-bounces at lists.osdl.org] On Behalf Of Nigel >Cunningham >Sent: Tuesday, June 13, 2006 3:10 PM >To: linux-pm at lists.osdl.org >Cc: Linus Torvalds >Subject: Re: [linux-pm] [PATCH 1/2] Add some basic resume trace facilities > >Hi. > >On Wednesday 14 June 2006 07:35, Linus Torvalds wrote: >> Considering that there isn't a lot of hw we can depend on during >> resume, this is about as good as it gets. >> >> Use "#include <linux/resume-trace.h>", and then sprinkle TRACE_RESUME(0) >> commands liberally over the driver that you're trying to figure out why >> and where it hangs. Expect to waste a _lot_ of time, but at least this >> gives you _some_ chance to actually debug it, instead of just staring at a >> dead machine. >> >> Signed-off-by: Linus Torvalds <torvalds at osdl.org> > >s/On laptop per child/One bdi2000 per computer/? I'll give it a try. That thing has a lot of flash one could just use to dump the system log too. If you can spare a few blocks it's not too hard to write a low level synchronous flash write code that works at panic time. I did this to a 2.4.10 kernel a while back, and it was *very* useful for debugging problems. --mgross
