Messages in this thread | | | Date | Mon, 1 Mar 2010 07:35:08 +0100 | From | Pavel Machek <> | Subject | Re: [linux-pm] Is it supposed to be ok to call del_gendisk while userspace is frozen? |
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Hi!
> > > This is a matter for Jens. Is the bdi writeback task freezable? If it > > > is, should it be made unfreezable? > > > > I'm not a big expect on what tasks should be freezable or not. As it > > stands, the writeback tasks will attempt to freeze and thaw with the > > system. I guess that screws the sync from resume call, since it's not > > running and the sync will wait for it to retrieve and finish that work > > item. > > > > To the suspend experts - can we safely mark the writeback tasks as > > non-freezable? > > The reason for freezing those tasks is to avoid writebacks at random > times during a system sleep transition, when the underlying device may > already be suspended, right?
It is also there to avoid inconsistency between in-filesystem data and snapshot in hibernation image.
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