On Mon, 2 Apr 2012, Arnd Bergmann wrote: > > Another option would be batched discard as we do it for file systems: > occasionally stop writing to swap space and scanning for areas that > have become available since the last discard, then send discard > commands for those. I'm not sure whether you've missed "swapon --discard", which switches on discard_swap_cluster() just before we allocate from a new cluster; or whether you're musing that it's no use to you because you want to repurpose the swap cluster to match erase block: I'm mentioning it in case you missed that it's already there (but few use it, since even done at that scale it's often more trouble than it's worth). Hugh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>