KVM: s390: Optimize ucontrol path

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Since commit 7c470539c9
(s390/kvm: avoid automatic sie reentry) we will run through the C code
of KVM on host interrupts instead of just reentering the guest. This
will result in additional ucontrol exits (at least HZ per second). Let
handle a 0 intercept in the kernel and dont return to userspace,
even if in ucontrol mode.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
CC: stable@vger.kernel.org

...

This commit is contained in:

Christian Borntraeger 2014-03-06 16:01:38 +01:00

parent fed495d25e

commit 2955c83f72

1 changed files with 2 additions and 1 deletions

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arch/s390/kvm/kvm-s390.c

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