From: Christian Borntraeger Date: Thu, 6 Mar 2014 15:01:38 +0000 (+0100) Subject: KVM: s390: Optimize ucontrol path X-Git-Tag: v3.15-rc1~118^2~17^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2955c83f72801245afd0fe5c560cc75b82bea9aa;p=pandora-kernel.git KVM: s390: Optimize ucontrol path Since commit 7c470539c95630c1f2a10f109e96f249730b75eb (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 Reviewed-by: Cornelia Huck CC: stable@vger.kernel.org --- Reading git-diff-tree failed