On Tuesday, 24 July 2007 16:00, Huang, Ying wrote: > >From: Rafael J. Wysocki [mailto:rjw at sisk.pl] > >This is not the point. There are memory regions that you should not > _restore_, > >because that will cause harm. > > > >> On x86_64, there is another usage of nosave during processing E820 > >> memory map. But I don't know why the memory region other than > E820_RAM > >> are marked as nosave. I think only the memory region of type E820_RAM > >> will be thought of normal memory, others will be thought as reserved. > Is > >> it sufficient just to check whether the page is reserved? > > > >No, it's not. > > The "/proc/iomem" records information of all memory regions including > "normal RAM" and all kinds of reserved regions, which is backed by > iomem_resource. On x86_64, it is initialized in the exact same way as > nosave region initialization. > > I think maybe we can replace the "nosave region" concepts with > "iomem_resource" (maybe need some enhancement). Yes, I think that might be done. Geetings, Rafael -- "Premature optimization is the root of all evil." - Donald Knuth
