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    SubjectRe: X-freeze after clflush changes [Was: 2.6.23-rc6-mm1]
    On Thu, Sep 20, 2007 at 11:42:29AM +1000, Dave Airlie wrote:
    > > The code is broken anyways. If you free pages without flushing
    > > them first some other innocent user allocating them will end up
    > > with possible uncached pages for some time.
    > >
    > > Does this simple patch help?
    > >
    >
    > 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

    Video is:

    01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250
    [Mobility FireGL 9000] (rev 02)


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