Martin Schwidefsky wrote: > From: Martin Schwidefsky <schwidefsky at de.ibm.com> > From: Hubertus Franke <frankeh at watson.ibm.com> > From: Himanshu Raj <rhim at cc.gatech.edu> > > [patch 1/9] Guest page hinting: unused / free pages. > > A very simple but already quite effective improvement in the handling > of guest memory vs. host memory is to tell the host when pages are > free. Would it be an idea to place this interface in-between the per-cpu free page lists and the buddy allocator, so we can move a batch of pages around at once and do the hinting in a batched fashion ? That way the overhead will be acceptable not just on S390 (where things are millicoded), but also on hypervisor based virtualization like Xen. Easy enough to pass a vector of pages to the hypervisor. -- What is important? What you want to be true, or what is true?
