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| author | Sean Christopherson <seanjc@google.com> | 2024-01-10 04:15:32 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-02-06 22:04:11 +0300 |
| commit | 8284765f03b7a0b18968cefeb5e78aca647b8f8b (patch) | |
| tree | 2dacd08f38baf749f7a1ca25f490193f88c0008c /include/linux/kvm_host.h | |
| parent | 422eeb543ac99ea24b80c19492c3359696500a47 (diff) | |
| download | linux-8284765f03b7a0b18968cefeb5e78aca647b8f8b.tar.xz | |
KVM: Get reference to VM's address space in the async #PF worker
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>
Diffstat (limited to 'include/linux/kvm_host.h')
| -rw-r--r-- | include/linux/kvm_host.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 7e7fd25b09b3..bbfefd7e612f 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -238,7 +238,6 @@ struct kvm_async_pf { struct list_head link; struct list_head queue; struct kvm_vcpu *vcpu; - struct mm_struct *mm; gpa_t cr2_or_gpa; unsigned long addr; struct kvm_arch_async_pf arch; |