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.
