On Thu, 20 Sep 2007 17:06:05 CDT, Matt Mackall said:
> On Thu, Sep 20, 2007 at 11:42:29AM +1000, Dave Airlie wrote:

> > I've attached a more complicated patch that does a 2 stage effort to
> > unmapping and freeing pages. My kernel no longer hangs with this
> > patch...
> > 
> > Jiri can you confirm?
> 
> It's broken for me.
> 
> 2.6.23-rc3-mm1: solid lock on X shutdown (noticed when upgrading)
>       -rc4-mm1: solid lock on X shutdown, random solid locks about
>                 once every four hours
>       -rc6-mm1: solid lock on X startup
>    +your patch: screen goes black, turns off and on a few times during
>                 startup, can reboot with sysrq-b

Hmm.. maybe I'm chasing a different bug manifested by the same patch.  For me,
it's been a solid lockup at X startup since -rc3-mm1, and this patch doesn't
change matters.