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linux/arch/x86/kvm
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Marcelo Tosatti 630994b3c7 KVM: x86: add module parameter to disable periodic kvmclock sync 
The periodic kvmclock sync can be an undesired source of latencies.

When running cyclictest on a guest, a latency spike is visible.
With kvmclock periodic sync disabled, the spike is gone.

Guests should use ntp which means the propagations of ntp corrections
from the host clock are unnecessary.

v2:
-> Make parameter read-only (Radim)
-> Return early on kvmclock_sync_fn (Andrew)

Reported-and-tested-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 		2015-05-28 10:43:35 +02:00
..
Kconfig Fairly small update, but there are some interesting new features. 2015-02-13 09:55:09 -08:00
Makefile KVM: x86: remove now unneeded include directory from Makefile 2015-03-26 21:43:13 +00:00
assigned-dev.c VFS: assorted d_backing_inode() annotations 2015-04-15 15:06:59 -04:00
assigned-dev.h KVM: x86: move device assignment out of kvm_host.h 2014-11-24 16:53:50 +01:00
cpuid.c Merge branch 'kvm-master' into kvm-next 2015-05-20 12:31:37 +02:00
cpuid.h kvm/fpu: Enable eager restore kvm FPU for MPX 2015-05-20 12:30:26 +02:00
emulate.c KVM: x86: Fix zero iterations REP-string 2015-05-19 20:52:36 +02:00
i8254.c KVM: Redesign kvm_io_bus_ API to pass VCPU structure to the callbacks. 2015-03-26 21:43:11 +00:00
i8254.h KVM: move iodev.h from virt/kvm/ to include/kvm 2015-03-26 21:43:12 +00:00
i8259.c KVM/ARM changes for v4.1: 2015-04-07 18:09:20 +02:00
ioapic.c KVM: x86: drop unneeded null test 2015-05-07 11:29:47 +02:00
ioapic.h KVM/ARM changes for v4.1: 2015-04-07 18:09:20 +02:00
iommu.c kvm: iommu: Add cond_resched to legacy device assignment code 2015-01-27 21:31:12 +01:00
irq.c KVM: nVMX: fix "acknowledge interrupt on exit" when APICv is in use 2014-08-05 15:00:24 +02:00
irq.h KVM: move iodev.h from virt/kvm/ to include/kvm 2015-03-26 21:43:12 +00:00
irq_comm.c kvm: x86: Deliver MSI IRQ to only lowest prio cpu if msi_redir_hint is true 2015-05-07 11:29:45 +02:00
kvm_cache_regs.h KVM: MMU: Do not unconditionally read PDPTE from guest memory 2011-09-25 19:18:01 +03:00
lapic.c kvm: x86: Deliver MSI IRQ to only lowest prio cpu if msi_redir_hint is true 2015-05-07 11:29:45 +02:00
lapic.h kvm: x86: Deliver MSI IRQ to only lowest prio cpu if msi_redir_hint is true 2015-05-07 11:29:45 +02:00
mmu.c KVM: x86: pass struct kvm_mmu_page to account/unaccount_shadowed 2015-05-28 10:43:34 +02:00
mmu.h KVM: MMU: fix MTRR update 2015-05-19 20:52:42 +02:00
mmu_audit.c KVM: MMU: introduce for_each_rmap_spte() 2015-05-19 20:52:38 +02:00
mmutrace.h x86/kvm/tracing: Use helper function trace_seq_buffer_ptr() 2014-11-19 15:25:36 -05:00
paging_tmpl.h KVM: MMU: fix smap permission check 2015-05-11 17:17:23 +02:00
pmu.c KVM: x86: For the symbols used locally only should be static type 2015-03-17 22:38:28 -03:00
svm.c Merge branch 'kvm-master' into kvm-next 2015-05-20 12:31:37 +02:00
trace.h KVM: VMX: Add PML support in VMX 2015-01-30 09:39:54 +01:00
tss.h KVM: x86: hardware task switching support 2008-04-27 12:00:39 +03:00
vmx.c Merge branch 'kvm-master' into kvm-next 2015-05-20 12:31:37 +02:00
x86.c KVM: x86: add module parameter to disable periodic kvmclock sync 2015-05-28 10:43:35 +02:00
x86.h KVM: x86: fix initial PAT value 2015-05-07 11:29:46 +02:00