diff options
| author | Ingo Molnar <mingo@elte.hu> | 2006-12-29 16:50:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-30 10:56:44 -0800 |
| commit | 8018c27b26af56af18eb8b2dc600eba825792d8f (patch) | |
| tree | 1125fea536282ff9605f101728a880157796692e /drivers/kvm/kvm_main.c | |
| parent | 55a54f79e091d52c3c2835985c347ea4d2e1c21f (diff) | |
[PATCH] kvm: fix GFP_KERNEL allocation in atomic section in kvm_dev_ioctl_create_vcpu()
fix an GFP_KERNEL allocation in atomic section: kvm_dev_ioctl_create_vcpu()
called kvm_mmu_init(), which calls alloc_pages(), while holding the vcpu.
The fix is to set up the MMU state in two phases: kvm_mmu_create() and
kvm_mmu_setup().
(NOTE: free_vcpus does an kvm_mmu_destroy() call so there's no need for any
extra teardown branch on allocation/init failure here.)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/kvm/kvm_main.c')
| -rw-r--r-- | drivers/kvm/kvm_main.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 973544553cb..ce7fe640f18 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -522,12 +522,14 @@ static int kvm_dev_ioctl_create_vcpu(struct kvm *kvm, int n) if (r < 0) goto out_free_vcpus; - kvm_arch_ops->vcpu_load(vcpu); + r = kvm_mmu_create(vcpu); + if (r < 0) + goto out_free_vcpus; - r = kvm_arch_ops->vcpu_setup(vcpu); + kvm_arch_ops->vcpu_load(vcpu); + r = kvm_mmu_setup(vcpu); if (r >= 0) - r = kvm_mmu_init(vcpu); - + r = kvm_arch_ops->vcpu_setup(vcpu); vcpu_put(vcpu); if (r < 0) |