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

This started as a non-regression bug-report about wakeonlan
During tests I found a real regression and this email is only about 2.6.22-rc3
without Rafael's patches - which I'll happily come back to later :)

Rafael J. Wysocki wrote:
> On Saturday, 2 June 2007 00:37, David Greaves wrote:
>> Rafael J. Wysocki wrote:
>>> On Friday, 1 June 2007 23:23, David Greaves wrote:
>> The real situation is worse :(
> 
> Ouch.
>  
>> 2.6.22-rc3 (no patches) just hangs on suspend at:
>> Suspending consoles
>>
>> console switching works but needs a hard reset to reboot.
>>
>> 2.6.22-rc3-skge (with Rafael's patches)
> Can you set CONFIG_DISABLE_CONSOLE_SUSPEND in .config and see where exactly it
> fails?

Given that I expected it to fail I unmounted my 1Tb array data before suspending.
It succeeded... so I started digging...

So I tried again.
2.6.22-rc3 (vanilla) suspended OK this time but on resume hung at:
Stopping tasks done
Shrinking memory done (0 pages freed)
Freed 0 kb in 0.0 secs (0.0MB/s)
Suspending console(s)

Then 2.6.22-rc3 again but CONFIG_DISABLE_CONSOLE_SUSPEND=y
It suspended again.
Froze on restore.
Screen photo here:
http://www.dgreaves.com/pub/2.6.21-rc3-resume-failure.jpg

Then 2.6.22-rc3 again but CONFIG_DISABLE_CONSOLE_SUSPEND=y
This time, before suspending I unmounted my xfs/lvm/raid6 filesystem.
Just a umount, I left the devices/array up.
It suspended again.
This time it resumed without fault.

The machine has another xfs filesystem :
/dev/hdb2 on /scratch type xfs (rw)

I've started bisecting... any other info needed?

David

Added Linus as it's a regression
Added xfs as unmounting an xfs filesystem 'fixes' it.

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