"H. Peter Anvin" wrote: > > Ravi K wrote: > > > Hi, > > The configuration help for HIGHMEM feature on i386 > > platform states that 'Linux can use up to 64 Gigabytes > > of physical memory on x86 systems'. I see a problem > > with this: > > - page structures needed to support 64GB would take > > up 1GB memory (64 bytes per page of size 4k) > > 64GB is physical memory, not virtual memory. And at approx. 64 bytes per strct page in mem_map, that's 1G worth of page structs, which is Ravi's point. Cheers, -- Joe "I should like to close this book by sticking out any part of my neck which is not yet exposed, and making a few predictions about how the problem of quantum gravity will in the end be solved." --- Physicist Lee Smolin, "Three Roads to Quantum Gravity" -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
