| Message ID | 20180725083214.7703-1-liangchen.linux@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: x86: Skip pae_root shadow allocation if tdp enabled | expand |
On 25/07/2018 10:32, Liang Chen wrote: > Considering the fact that the pae_root shadow is not needed when > tdp is in use, skip the pae_root shadow page allocation to allow > mmu creation even not being able to obtain memory from DMA32 > zone when particular cgroup cpuset.mems or mempolicy control is > applied. > > Signed-off-by: Liang Chen <liangchen.linux@gmail.com> > --- > arch/x86/kvm/mmu.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c > index d594690..af8cc1e 100644 > --- a/arch/x86/kvm/mmu.c > +++ b/arch/x86/kvm/mmu.c > @@ -5029,6 +5029,9 @@ static int alloc_mmu_pages(struct kvm_vcpu *vcpu) > struct page *page; > int i; > > + if (tdp_enabled) > + return 0; > + > /* > * When emulating 32-bit mode, cr3 is only 32 bits even on x86_64. > * Therefore we need to allocate shadow page tables in the first > Queued, thanks. Paolo
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index d594690..af8cc1e 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -5029,6 +5029,9 @@ static int alloc_mmu_pages(struct kvm_vcpu *vcpu) struct page *page; int i; + if (tdp_enabled) + return 0; + /* * When emulating 32-bit mode, cr3 is only 32 bits even on x86_64. * Therefore we need to allocate shadow page tables in the first
Considering the fact that the pae_root shadow is not needed when tdp is in use, skip the pae_root shadow page allocation to allow mmu creation even not being able to obtain memory from DMA32 zone when particular cgroup cpuset.mems or mempolicy control is applied. Signed-off-by: Liang Chen <liangchen.linux@gmail.com> --- arch/x86/kvm/mmu.c | 3 +++ 1 file changed, 3 insertions(+)