Jeremy Fitzhardinge 8b84ad942b xen: hack to prevent bad segment register reload ... The hypervisor saves and restores the segment registers as part of the state is saves while context switching. If, during a context switch, the next process doesn't use the TLS segments, it invalidates the GDT entry, causing the segment register reload to fault. This fault effectively doubles the cost of a context switch. This patch is a band-aid workaround which clears the usermode %gs after it has been saved for the previous process, but before it gets reloaded for the next, and it avoids having the hypervisor attempt to erroneously reload it. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org>		2007-07-18 08:47:44 -07:00
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enlighten.c	xen: hack to prevent bad segment register reload	2007-07-18 08:47:44 -07:00
events.c	xen: SMP guest support	2007-07-18 08:47:44 -07:00
features.c
Kconfig	xen: Add support for preemption	2007-07-18 08:47:44 -07:00
Makefile	xen: SMP guest support	2007-07-18 08:47:44 -07:00
mmu.c	xen: lazy-mmu operations	2007-07-18 08:47:44 -07:00
mmu.h	xen: SMP guest support	2007-07-18 08:47:44 -07:00
multicalls.c	xen: lazy-mmu operations	2007-07-18 08:47:44 -07:00
multicalls.h
setup.c	xen: SMP guest support	2007-07-18 08:47:44 -07:00
smp.c	xen: SMP guest support	2007-07-18 08:47:44 -07:00
time.c	xen: Add support for preemption	2007-07-18 08:47:44 -07:00
xen-head.S
xen-ops.h	xen: SMP guest support	2007-07-18 08:47:44 -07:00