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KVM: remove dummy pages

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Currently, kvm allocates some pages and use them as error indicators,
it wastes memory and is not good for scalability

Base on Avi's suggestion, we use the error codes instead of these pages
to indicate the error conditions

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong
2012-07-26 11:58:59 +08:00
committed by Avi Kivity
parent 2b4b5af8f8
commit a2766325cf
3 changed files with 52 additions and 75 deletions
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3
virt/kvm/async_pf.c
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@@ -203,8 +203,7 @@ int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu)
if (!work)
return -ENOMEM;
work->page = bad_page;
get_page(bad_page);
work->page = get_bad_page();
INIT_LIST_HEAD(&work->queue); /* for list_del to work */
spin_lock(&vcpu->async_pf.lock);