Re: 2.6.22-rc3 hibernate(?) fails totally - regression (xfs on raid6)

[David Greaves <david@xxxxxxxxxxxx>]

Tejun Heo wrote:
> Hello,
>
> David Greaves wrote:
> > Just to be clear. This problem is where my system won't resume after s2d
> > unless I umount my xfs over raid6 filesystem.
>
> This is really weird.  I don't see how xfs mount can affect this at all.
Indeed.
It does :)

> How hard does the machine freeze?  Can you use sysrq?  If so, please
> dump sysrq-t.
I suspect there is a problem writing to the consoles...

I recompiled (rc4+patch) with sysrq support, suspended, resumed and tried 
sysrq-t but got no output.

I *can* change VTs and see the various login prompts, bitmap messages and the 
console messages. Caps/Num lock lights work.

Fearing incompetence I tried sysrq-s sysrq-u sysrq-b and got a reboot so sysrq 
is OK.

Any suggestions on how to see more? Or what to try next?

Any other kernel debug options to set?

David
PS Back in a couple of hours...