github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 09:36:22 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: s390: Improve kvm_s390_vm_stop_migration()

Browse Source 
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: 6cfd47f91f ("KVM: s390: Fix cmma dirty tracking")
Fixes: 190df4a212 ("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>
This commit is contained in:
Claudio Imbrenda 2026-07-02 17:24:06 +02:00 committed by Christian Borntraeger
parent 4d4a21e38f
commit 9489220fe0
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/s390/kvm/kvm-s390.c
View File

@ -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);