sysenter patch question

Suleiman Souhlal ssouhlal at
Sat Jan 14 11:36:05 PST 2006

Scott Long wrote:
> I was the last to work on the patch, and that was about a year or so
> ago.  It worked fine under fairly simple processes, but trying to run
> things like KDE and Mozilla made it blow up fairly quickly.  I suspect
> that it has something to do with thread upcalls, but I never got around
> to figuring it out.  If someone wants to pick it up, that would be
> great.  Note that this only matters for i386; amd64 has always had its
> own version of sysenter that it uses.

As far as I know, amd64 uses the SYSCALL instruction, which I believe, 
should have about the same performance as SYSENTER.


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