KVM: X86: Introduce mmu_rmaps_stat per-vm debugfs file
Use this file to dump rmap statistic information. The statistic is done by calculating the rmap count and the result is log-2-based. An example output of this looks like (idle 6GB guest, right after boot linux): Rmap_Count: 0 1 2-3 4-7 8-15 16-31 32-63 64-127 128-255 256-511 512-1023 Level=4K: 3086676 53045 12330 1272 502 121 76 2 0 0 0 Level=2M: 5947 231 0 0 0 0 0 0 0 0 0 Level=1G: 32 0 0 0 0 0 0 0 0 0 0 Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20210730220455.26054-5-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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