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| author |   Sean Christopherson <sean.j.christopherson@intel.com> | 2020-02-18 13:07:32 -0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2020-03-16 17:57:26 +0100 |
| commit | 36947254e5f981aeeedab1c7dfa35fc34d330e80 (patch) | |
| tree | f0d27fa167eaa2902831e1485172288072e45617 /include | |
| parent | KVM: Terminate memslot walks via used_slots (diff) | |
| download | linux-dev-36947254e5f981aeeedab1c7dfa35fc34d330e80.tar.xz linux-dev-36947254e5f981aeeedab1c7dfa35fc34d330e80.zip | |
KVM: Dynamically size memslot array based on number of used slots
Now that the memslot logic doesn't assume memslots are always non-NULL,
dynamically size the array of memslots instead of unconditionally
allocating memory for the maximum number of memslots.
Note, because a to-be-deleted memslot must first be invalidated, the
array size cannot be immediately reduced when deleting a memslot.
However, consecutive deletions will realize the memory savings, i.e.
a second deletion will trim the entry.
Tested-by: Christoffer Dall <christoffer.dall@arm.com>
Tested-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 20763598b13b..4bd5251b4477 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -431,11 +431,11 @@ static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu) */ struct kvm_memslots { u64 generation; - struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM]; /* The mapping table from slot id to the index in memslots[]. */ short id_to_index[KVM_MEM_SLOTS_NUM]; atomic_t lru_slot; int used_slots; + struct kvm_memory_slot memslots[]; }; struct kvm { |