On 7/11/07, Avi Kivity <[EMAIL PROTECTED]> wrote: > Current kvm disables preemption while the new virtualization registers are > in use. This of course is not very good for latency sensitive workloads (one > use of virtualization is to offload user interface and other latency > insensitive stuff to a container, so that it is easier to analyze the > remaining workload). This patch re-enables preemption for kvm; preemption > is now only disabled when switching the registers in and out, and during > the switch to guest mode and back. [...] > diff --git a/drivers/kvm/Kconfig b/drivers/kvm/Kconfig > index 33fa28a..92644b5 100644 > --- a/drivers/kvm/Kconfig > +++ b/drivers/kvm/Kconfig > @@ -10,7 +10,7 @@ if VIRTUALIZATION > > config KVM > tristate "Kernel-based Virtual Machine (KVM) support" > - depends on X86 && EXPERIMENTAL > + depends on X86 && EXPERIMENTAL && PREEMPT_HOOKS > depends on X86_CMPXCHG64 || 64BIT
select PREEMPT_HOOKS maybe? Luca ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
