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pc: kvm: check if KVM has free memory slots to avoid abort()

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When more memory devices are used than available
KVM memory slots, QEMU crashes with:

kvm_alloc_slot: no free slot available
Aborted (core dumped)

Fix this by checking that KVM has a free slot before
attempting to map memory in guest address space.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2014-10-31 16:38:32 +00:00 • committed by Michael S. Tsirkin
parent c409572678
commit b8865591d4
4 changed files with 28 additions and 1 deletions
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18
kvm-all.c
View file

@ -132,7 +132,7 @@ static const KVMCapabilityInfo kvm_required_capabilites[] = {
KVM_CAP_LAST_INFO
};
static KVMSlot *kvm_alloc_slot(KVMState *s)
static KVMSlot *kvm_get_free_slot(KVMState *s)
{
int i;
@ -142,6 +142,22 @@ static KVMSlot *kvm_alloc_slot(KVMState *s)
}
}
return NULL;
}
bool kvm_has_free_slot(MachineState *ms)
{
return kvm_get_free_slot(KVM_STATE(ms->accelerator));
}
static KVMSlot *kvm_alloc_slot(KVMState *s)
{
KVMSlot *slot = kvm_get_free_slot(s);
if (slot) {
return slot;
}
fprintf(stderr, "%s: no free slot available\n", __func__);
abort();
}