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| author | Ben Gardon <bgardon@google.com> | 2020-10-14 11:26:56 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-23 03:42:14 -0400 |
| commit | 14881998566d2dc0703870bbe063e8d42d780eb9 (patch) | |
| tree | c5fe7553fde8d6e1c9a73e2df9ba19daefb9aa47 /tools/testing/selftests/bpf/prog_tests/global_data_init.c | |
| parent | a6a0b05da9f37ff56faa6b8351ed6e0b55032460 (diff) | |
kvm: x86/mmu: Support disabling dirty logging for the tdp MMU
Dirty logging ultimately breaks down MMU mappings to 4k granularity.
When dirty logging is no longer needed, these granaular mappings
represent a useless performance penalty. When dirty logging is disabled,
search the paging structure for mappings that could be re-constituted
into a large page mapping. Zap those mappings so that they can be
faulted in again at a higher mapping level.
Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell
machine. This series introduced no new failures.
This series can be viewed in Gerrit at:
https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20201014182700.2888246-17-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/global_data_init.c')
0 files changed, 0 insertions, 0 deletions