diff options
| author | Sean Christopherson <[email protected]> | 2021-01-13 12:50:30 -0800 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2021-02-04 05:27:15 -0500 |
| commit | 8fc517267fb28576dfca2380cc2497a2454b8fae (patch) | |
| tree | 01cbf403da58e92d96d3789d81f66ca5ae2d1283 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 15e6a7e5324cc04a67891fc369ea834bbb7e7b42 (diff) | |
KVM: x86: Zap the oldest MMU pages, not the newest
Walk the list of MMU pages in reverse in kvm_mmu_zap_oldest_mmu_pages().
The list is FIFO, meaning new pages are inserted at the head and thus
the oldest pages are at the tail. Using a "forward" iterator causes KVM
to zap MMU pages that were just added, which obliterates guest
performance once the max number of shadow MMU pages is reached.
Fixes: 6b82ef2c9cf1 ("KVM: x86/mmu: Batch zap MMU pages when recycling oldest pages")
Reported-by: Zdenek Kaspar <[email protected]>
Cc: [email protected]
Signed-off-by: Sean Christopherson <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions