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| author | Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> | 2011-11-24 17:38:24 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-12-27 11:17:35 +0200 |
| commit | be593d6286075801bba6d60fa466a39c24cc7616 (patch) | |
| tree | 7d2b156d7a9fa19700cb7ac5327a15093114905a /virt/kvm/kvm_main.c | |
| parent | 93a5cef07d686a0341d056b0f930a762c7174a13 (diff) | |
| download | lwn-be593d6286075801bba6d60fa466a39c24cc7616.tar.gz lwn-be593d6286075801bba6d60fa466a39c24cc7616.zip | |
KVM: introduce update_memslots function
Introduce update_memslots to update slot which will be update to
kvm->memslots
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
| -rw-r--r-- | virt/kvm/kvm_main.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 9ad94c9996e7..b5ed7770ced3 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -630,6 +630,19 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) } #endif /* !CONFIG_S390 */ +void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new) +{ + if (new) { + int id = new->id; + + slots->memslots[id] = *new; + if (id >= slots->nmemslots) + slots->nmemslots = id + 1; + } + + slots->generation++; +} + /* * Allocate some memory and give it an address in the guest physical address * space. @@ -780,10 +793,8 @@ skip_lpage: GFP_KERNEL); if (!slots) goto out_free; - if (mem->slot >= slots->nmemslots) - slots->nmemslots = mem->slot + 1; - slots->generation++; slots->memslots[mem->slot].flags |= KVM_MEMSLOT_INVALID; + update_memslots(slots, NULL); old_memslots = kvm->memslots; rcu_assign_pointer(kvm->memslots, slots); @@ -815,9 +826,6 @@ skip_lpage: GFP_KERNEL); if (!slots) goto out_free; - if (mem->slot >= slots->nmemslots) - slots->nmemslots = mem->slot + 1; - slots->generation++; /* actual memory is freed via old in kvm_free_physmem_slot below */ if (!npages) { @@ -827,7 +835,7 @@ skip_lpage: new.lpage_info[i] = NULL; } - slots->memslots[mem->slot] = new; + update_memslots(slots, &new); old_memslots = kvm->memslots; rcu_assign_pointer(kvm->memslots, slots); synchronize_srcu_expedited(&kvm->srcu); |