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    SubjectRe: [linux-pm] Re: swsusp 'disk' fails in bk-current - intel_agp at fault?
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    Date
    Hi.

    On Fri, 2005-04-01 at 08:18, Pavel Machek wrote:
    > Hi!
    >
    > > > > Ok, what do you think about this one?
    > > > >
    > > > > ===================================================================
    > > > >
    > > > > swsusp: disable usermodehelper after generating memory snapshot and
    > > > > before resuming devices, so when device fails to resume we
    > > > > won't try to call hotplug - userspace stopped anyway.
    > > >
    > > > Hm, shouldn't we disable it before we start to freeze processes? We don't
    > > > want any more processes trying to start up after we've taken care of
    > > > them..
    > > >
    > >
    > > Can't a device be removed (for any reason) _while_ we are freezing
    > > processes? I think freeszing code will properly deal with it... What
    > > about suspend semantics - if suspend fails do we say the device should
    > > be operational or the system should attempt to re-initialize? I.e. we
    > > are not doing suspend after all - can we still drop messages on the
    > > floor? After all, we still have ability to run coldplug after failed
    > > suspend.
    >
    > I believe we should freeze hotplug before processes. Dropping messages
    > on the floor should not be a problem, we should just call coldplug
    > after failed suspend.

    How will you know which devices to call coldplug for, post resume? (Or
    does it figure that out itself somehow?)

    Regards,

    Nigel
    --
    Nigel Cunningham
    Software Engineer, Canberra, Australia
    http://www.cyclades.com
    Bus: +61 (2) 6291 9554; Hme: +61 (2) 6292 8028; Mob: +61 (417) 100 574

    Maintainer of Suspend2 Kernel Patches http://suspend2.net

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