diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2015-10-14 19:33:09 -0300 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2016-03-24 10:01:17 +0000 |
| commit | 3d29c6dba44ff92a6a99e5e532cdca1ed35ed460 (patch) | |
| tree | ee7c8ec65f3c8a066fb7da598208e817ecd06f46 /include/linux | |
| parent | 9541db7a989ae95b320013de227f2a132e6f0463 (diff) | |
KVM: x86: move steal time initialization to vcpu entry time
commit 7cae2bedcbd4680b155999655e49c27b9cf020fa upstream.
As reported at https://bugs.launchpad.net/qemu/+bug/1494350,
it is possible to have vcpu->arch.st.last_steal initialized
from a thread other than vcpu thread, say the iothread, via
KVM_SET_MSRS.
Which can cause an overflow later (when subtracting from vcpu threads
sched_info.run_delay).
To avoid that, move steal time accumulation to vcpu entry time,
before copying steal time data to guest.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Liang Chen <liangchen.linux@gmail.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions