Hi!
> > It does apply to all of the LRU pages. This is what I've been doing for years
> > now. The only corner case I've come across is XFS. It still wants to write
> > data even when there's nothing to do and it's threads are frozen (IIRC -
> > haven't looked at it for a while). I got around that by freezing bdevs when
> > freezing processes.
>
> This means if we freeze bdevs, we'll be able to save all of the LRU pages,
> except for the pages mapped by the current task, without copying. I think we
> can try to do this, but we'll need a patch to freeze bdevs for this purpose. ;-)
...adding more dependencies to how vm/blockdevs work. I'd say current
code is complex enough...
Pavel
--
Thanks for all the (sleeping) penguins.
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