From: Claudio Imbrenda imbrenda@linux.ibm.com
[ Upstream commit 1e2aa46de526a5adafe580bca4c25856bb06f09e ]
When the system is heavily overcommitted, kvm_s390_pv_init_vm might generate stall notifications.
Fix this by using uv_call_sched instead of just uv_call. This is ok because we are not holding spinlocks.
Signed-off-by: Claudio Imbrenda imbrenda@linux.ibm.com Fixes: 214d9bbcd3a672 ("s390/mm: provide memory management functions for protected KVM guests") Reviewed-by: Christian Borntraeger borntraeger@de.ibm.com Reviewed-by: Janosch Frank frankja@linux.ibm.com Message-Id: 20210920132502.36111-4-imbrenda@linux.ibm.com Signed-off-by: Janosch Frank frankja@linux.ibm.com Signed-off-by: Christian Borntraeger borntraeger@de.ibm.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/s390/kvm/pv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c index 74265304dd9cd..8228878872228 100644 --- a/arch/s390/kvm/pv.c +++ b/arch/s390/kvm/pv.c @@ -190,7 +190,7 @@ int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc) uvcb.conf_base_stor_origin = (u64)kvm->arch.pv.stor_base; uvcb.conf_virt_stor_origin = (u64)kvm->arch.pv.stor_var;
- cc = uv_call(0, (u64)&uvcb); + cc = uv_call_sched(0, (u64)&uvcb); *rc = uvcb.header.rc; *rrc = uvcb.header.rrc; KVM_UV_EVENT(kvm, 3, "PROTVIRT CREATE VM: handle %llx len %llx rc %x rrc %x",