On Thu, 2007-02-08 at 22:59 -0800, Zachary Amsden wrote: > I believe there was a patch that got applied that turned it off by > default if CONFIG_PARAVIRT was enabled. Doing it the cpuid way is the > right solution, IMHO. Ah, yes, the VDSO issue. This is separate, and does need fixing. Basically, if the user doesn't select COMPAT_VDSO, we don't have a problem. Currently they don't get offered COMPAT_VDSO if PARAVIRT is enabled, but we *still* disable vdso in that case (unless vdso=1 is on cmdline). I think the best choice is to rework COMPAT_VDSO to a general "support old glibcs" option, which will either (1) map it fixed if ! CONFIG_PARAVIRT, or (2) disable it if CONFIG_PARAVIRT. I'll send that soon... Cheers, Rusty.