On 24/07/15 19:55, Konrad Rzeszutek Wilk wrote: > On Fri, Jul 24, 2015 at 12:47:46PM +0100, David Vrabel wrote: >> alloc_xenballooned_pages() is used to get ballooned pages to back >> foreign mappings etc. Instead of having to balloon out real pages, >> use (if supported) hotplugged memory. >> >> This makes more memory available to the guest and reduces >> fragmentation in the p2m. >> >> If userspace is lacking a udev rule (or similar) to online hotplugged > > Is that udev rule already in distros? Not all, which makes me think that this behaviour should be enabled by userspace (via a module parameter). This would also allow me to drop the timeout and fallback path which I put in to handle the no udev rule case. David -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>