diff options
| author | Claudio Imbrenda <imbrenda@linux.ibm.com> | 2026-07-02 17:24:06 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@linux.ibm.com> | 2026-07-09 10:26:10 +0200 |
| commit | 9489220fe0e69d2ca141e5062dd3ef3e2e55959f (patch) | |
| tree | 6afca9c6fb5b1c6c914865bdc10581a08f568ad5 | |
| parent | 4d4a21e38f1b87a76b3e63d4f837ff4e9b52d5a6 (diff) | |
KVM: s390: Improve kvm_s390_vm_stop_migration()
There is no need to clear cmma-dirty state if the VM is not using CMMA.
Skip the CMMA-related code if CMMA is not in use.
Fixes: 6cfd47f91f6a ("KVM: s390: Fix cmma dirty tracking")
Fixes: 190df4a212a7 ("KVM: s390: CMMA tracking, ESSA emulation, migration mode")
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 23c817595e28..150b5dd2170e 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -1280,8 +1280,10 @@ static int kvm_s390_vm_stop_migration(struct kvm *kvm) * PGSTEs might have cmma_d set. */ WRITE_ONCE(kvm->arch.migration_mode, 0); - if (kvm->arch.use_cmma) - kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION); + if (!kvm->arch.use_cmma) + return 0; + + kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION); /* Clear cmma_d on all existing PGSTEs and set cmma_dirty_pages to 0. */ gmap_set_cmma_all_clean(kvm->arch.gmap); atomic64_set(&kvm->arch.cmma_dirty_pages, 0); |