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authorPaolo Bonzini <pbonzini@redhat.com>2014-07-15 21:45:42 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2014-07-18 15:15:14 +0200
commit108e4c3871e0d0cd185ccffef5e932961f92dd63 (patch)
treef7d3788ad0b7b7d40fd92e74e4d402189e57e047 /hw
parentbb2eb1892d36e5c9fa1695924434313e3acbb1c0 (diff)
Revert "kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation"
This reverts commit 9b1786829aefb83f37a8f3135e3ea91c56001b56. This patch fixed a hang introduced by commit a096b3a (kvmclock: Ensure time in migration never goes backward, 2014-05-16), but it causes a regression in migration whose cause is not quite clear. Because of this, I'm choosing to revert both patches. This trades a 2.1 regression for a bug that's been there forever. Cc: agraf@suse.de Cc: mtosatti@redhat.com Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/i386/kvm/clock.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/hw/i386/kvm/clock.c b/hw/i386/kvm/clock.c
index 272a88acb5..feb5fc5109 100644
--- a/hw/i386/kvm/clock.c
+++ b/hw/i386/kvm/clock.c
@@ -17,7 +17,6 @@
#include "qemu/host-utils.h"
#include "sysemu/sysemu.h"
#include "sysemu/kvm.h"
-#include "sysemu/cpus.h"
#include "hw/sysbus.h"
#include "hw/kvm/clock.h"
@@ -66,7 +65,6 @@ static uint64_t kvmclock_current_nsec(KVMClockState *s)
cpu_physical_memory_read(kvmclock_struct_pa, &time, sizeof(time));
- assert(time.tsc_timestamp <= migration_tsc);
delta = migration_tsc - time.tsc_timestamp;
if (time.tsc_shift < 0) {
delta >>= -time.tsc_shift;
@@ -125,8 +123,6 @@ static void kvmclock_vm_state_change(void *opaque, int running,
if (s->clock_valid) {
return;
}
-
- cpu_synchronize_all_states();
ret = kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, &data);
if (ret < 0) {
fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(ret));