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Date: Sat, 14 Jan 2006 11:36:03 -0800
From: Suleiman Souhlal <ssouhlal@FreeBSD.org>
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To: Scott Long <scottl@samsco.org>
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Cc: Divacky Roman <xdivac02@stud.fit.vutbr.cz>, current@freebsd.org
Subject: Re: sysenter patch question
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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.

--Suleiman