/proc/cpuinfo missing sep flag
Dave Jones
davej at redhat.com
Mon Apr 17 23:18:48 UTC 2006
On Mon, Apr 17, 2006 at 07:15:38PM -0400, Jim Cromie wrote:
> This is pretty obscure, and I havent seen any problems because of it,
> but it is a bit odd.
>
> Can someone(s)
> - confirm its absense on 2.6.16-1.2069_FC4 or other
> - check their FC-5 /proc/cpuinfo, and report back.
> - explain why this is a good thing, or how it might have happened
> accidentally ?
SEP is incompatible with segment-based NX emulation provided
by exec-shield in the Fedora kernel.
The reason for this is that a SYSRET resets the segment limits.
Dave
--
http://www.codemonkey.org.uk
More information about the fedora-list
mailing list