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8284765f03
Get a reference to the target VM's address space in async_pf_execute() instead of gifting a reference from kvm_setup_async_pf(). Keeping the address space alive just to service an async #PF is counter-productive, i.e. if the process is exiting and all vCPUs are dead, then NOT doing get_user_pages_remote() and freeing the address space asap is desirable. Handling the mm reference entirely within async_pf_execute() also simplifies the async #PF flows as a whole, e.g. it's not immediately obvious when the worker task vs. the vCPU task is responsible for putting the gifted mm reference. Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Xu Yilun <yilun.xu@intel.com> Link: https://lore.kernel.org/r/20240110011533.503302-4-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com> |
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