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| author | Raghavendra Rao Ananta <[email protected]> | 2023-08-11 04:51:26 +0000 |
|---|---|---|
| committer | Marc Zyngier <[email protected]> | 2023-08-17 08:40:35 +0000 |
| commit | defc8cc7abf0fcee8d73e440ee02827348d060e0 (patch) | |
| tree | 9092158864af8a9452a777891371e959ff1fa6cd /tools/perf/scripts/python | |
| parent | KVM: arm64: Flush only the memslot after write-protect (diff) | |
| download | kernel-defc8cc7abf0fcee8d73e440ee02827348d060e0.tar.gz kernel-defc8cc7abf0fcee8d73e440ee02827348d060e0.zip | |
KVM: arm64: Invalidate the table entries upon a range
Currently, during the operations such as a hugepage collapse,
KVM would flush the entire VM's context using 'vmalls12e1is'
TLBI operation. Specifically, if the VM is faulting on many
hugepages (say after dirty-logging), it creates a performance
penalty for the guest whose pages have already been faulted
earlier as they would have to refill their TLBs again.
Instead, leverage kvm_tlb_flush_vmid_range() for table entries.
If the system supports it, only the required range will be
flushed. Else, it'll fallback to the previous mechanism.
Signed-off-by: Raghavendra Rao Ananta <[email protected]>
Reviewed-by: Gavin Shan <[email protected]>
Reviewed-by: Shaoqin Huang <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions