On Sun, 3 Jul 2011 19:46:16 +0200 Pavel Machek <pavel@xxxxxx> wrote: > Hi! > > > > I think, however, that we really should try to merge them. The only > > > difference seems to be how the additionally allocated pages will be populated > > > and what's going to happen to their contents during restore. > > > > > > ACPI will simply copy the NVS memory to those pages, while S390 will save > > > the relevant storage key bits in there. > > > > One complication to keep in mind is that we need to know which storage key > > goes to which page frame. We need something like the orig_bm/copy_bm or > > we'd have to store the pfn with the key. Simply storing the key for every > > page will make the array unnecessarily big. > > How big is the overhead? In percent / in megabytes? Well, that depends on the ratio of the size of the hibernation image and the total size of the ram. Consider a 1TB machine with a hibernation image size of lets say 128 GB. The hibernation image would require 32 MB worth of storage keys (0.024%), for 1TB the array size would be 256 MB (0.19%). -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
