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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2019-02-05 13:01:21 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-02-20 22:48:39 +0100 |
| commit | 4e103134b862314dc2f2f18f2fb0ab972adc3f5f (patch) | |
| tree | dccc458d31608d0d922d8af8265bdf938dc35e23 /net/lapb/lapb_timer.c | |
| parent | a21136345cb6f1a5b7f576701b6a454da5b6e606 (diff) | |
| download | lwn-4e103134b862314dc2f2f18f2fb0ab972adc3f5f.tar.gz lwn-4e103134b862314dc2f2f18f2fb0ab972adc3f5f.zip | |
KVM: x86/mmu: Zap only the relevant pages when removing a memslot
Modify kvm_mmu_invalidate_zap_pages_in_memslot(), a.k.a. the x86 MMU's
handler for kvm_arch_flush_shadow_memslot(), to zap only the pages/PTEs
that actually belong to the memslot being removed. This improves
performance, especially why the deleted memslot has only a few shadow
entries, or even no entries. E.g. a microbenchmark to access regular
memory while concurrently reading PCI ROM to trigger memslot deletion
showed a 5% improvement in throughput.
Cc: Xiao Guangrong <guangrong.xiao@gmail.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions