Messages in this thread | | | From | Amit Shah <> | Subject | Re: [PATCH] KVM x86: Handle hypercalls for assigned PCI devices | Date | Thu, 1 May 2008 18:48:28 +0530 |
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On Tuesday 29 April 2008 21:28:51 Amit Shah wrote: > On Tuesday 29 April 2008 20:14:16 Glauber Costa wrote: > > Amit Shah wrote:
> > > + if (find_pci_pt_dev(&vcpu->kvm->arch.pci_pt_dev_head, > > > + &pci_pt_info, 0, KVM_PT_SOURCE_ASSIGN)) > > > + r++; /* We have assigned the device */ > > > + > > > + kunmap(host_page); > > > > better use atomic mappings here. > > We can't use atomic mappings for guest pages. They can be swapped out.
Actually you were right: there's no sleeping call here after doing the mapping. I've updated this call with kmap_atomic.
The other function that uses kmap can't be converted since we continue to map several pages in a loop (depending on the length of the DMA region) and hence can't use kmap_atomic there.
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