No bootloader -- 2.6.4-1.303.i386 is it me?
davej at redhat.com
Mon Apr 5 17:11:52 UTC 2004
On Sat, 2004-04-03 at 02:39, Phil Schaffner wrote:
> > What is vdso=0 anyway?
> Bit me too. The "vdso=0" has me running 303 on an Athlon now. Glad to
> see a Red Hat guy is puzzled also.
> Google is NOT my friend on this - best I can find is that a vDSO is a
> virtual DSO, has something to do with CPU features, and that the kernel
> hackers have been talking about randomizing it, and trade-offs of
> efficiency with security vulnerabilities quite a lot as of late. Please
> enlighten us mere mortals.
It enables usage of sysenter instruction to enter the kernel instead of
using int 80h instructions. Sysenter is faster if the cpu supports it
(quite dramatically so on newer CPUs like P4s), but there are obviously
some bugs that need fixing before we can run with it.
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