From fcd2b8755f1910478f2be63c9339b4c815f046ba Mon Sep 17 00:00:00 2001 From: Justus Winter Date: Wed, 4 May 2016 19:33:52 +0200 Subject: Add missing paragraph --- microkernel/mach/gnumach/projects/mach_5.mdwn | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'microkernel') diff --git a/microkernel/mach/gnumach/projects/mach_5.mdwn b/microkernel/mach/gnumach/projects/mach_5.mdwn index bf678556..73aaef99 100644 --- a/microkernel/mach/gnumach/projects/mach_5.mdwn +++ b/microkernel/mach/gnumach/projects/mach_5.mdwn @@ -105,6 +105,10 @@ sysenter improves our IPC performance by ~10%. ### Implementation +One trouble with sysenter/sysexit (or the amd equivalent) isn't +available on all processors. Linux solves this using the VDSO +mechanism. + I'd like to implement something similar: 1. There is a platform dependent way to map a special page. -- cgit v1.2.3