On Wed, Apr 21, 2010 at 06:23:45AM +0200, Christian Ehrhardt wrote: > Rik van Riel wrote: > >You do not want the backup to kick the working set > >out of memory, because when the user returns in the > >morning the desktop should come back quickly after > >the screensaver is unlocked. > > IMHO it is fine to prevent that nightly backup job from not being > finished when the user arrives at morning because we didn't give him > some more cache - and e.g. a 30 sec transition from/to both optimized > states is fine. For batched work maybe :-) > What we could do is combine all our thoughts we had so far: > a) Rik could create an experimental patch that excludes the in flight pages > b) Johannes could create one for his suggestion to "always scan active > file pages but only deactivate them when the ratio is off and otherwise > strip buffers of clean pages" Please drop that idea, that 'Buffers:' is a red herring. It's just pages that do not back files but block devices. Stripping buffer_heads won't achieve anything, we need to get rid of the pages. Sorry, I should have slept and thought before writing that suggestion. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>