Messages in this thread | | | Date | Tue, 07 Apr 2015 13:11:13 +0200 | From | Paolo Bonzini <> | Subject | Re: [PATCH] x86: vdso: fix pvclock races with task migration |
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On 02/04/2015 20:44, Radim Krčmář wrote: > If we were migrated right after __getcpu, but before reading the > migration_count, we wouldn't notice that we read TSC of a different > VCPU, nor that KVM's bug made pvti invalid, as only migration_count > on source VCPU is increased. > > Change vdso instead of updating migration_count on destination. > > Fixes: 0a4e6be9ca17 ("x86: kvm: Revert "remove sched notifier for cross-cpu migrations"") > Cc: stable@vger.kernel.org > Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Applying this, but removing the "Fixes" tag because a guest patch cannot fix a host patch (it can work around it or complement it).
Paolo
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