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| author |   David Hildenbrand <dahi@linux.vnet.ibm.com> | 2015-01-14 14:08:38 +0100 |
|---|---|---|
| committer |   Christian Borntraeger <borntraeger@de.ibm.com> | 2015-05-08 15:51:16 +0200 |
| commit | 96e0ed23dca3769053c5211ef885e789097834bf (patch) | |
| tree | ae7324f669fcb7329a0681367bbfe8233d79091d /arch/s390/kvm/intercept.c | |
| parent | KVM: s390: optimize interrupt handling round trip time (diff) | |
| download | linux-dev-96e0ed23dca3769053c5211ef885e789097834bf.tar.xz linux-dev-96e0ed23dca3769053c5211ef885e789097834bf.zip | |
KVM: s390: factor out and optimize floating irq VCPU kick
This patch factors out the search for a floating irq destination
VCPU as well as the kicking of the found VCPU. The search is optimized
in the following ways:
1. stopped VCPUs can't take any floating interrupts, so try to find an
operating one. We have to take care of the special case where all
VCPUs are stopped and we don't have any valid destination.
2. use online_vcpus, not KVM_MAX_VCPU. This speeds up the search
especially if KVM_MAX_VCPU is increased one day. As these VCPU
objects are initialized prior to increasing online_vcpus, we can be
sure that they exist.
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Reviewed-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/intercept.c')
0 files changed, 0 insertions, 0 deletions