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Optimize system PTE deallocation by avoiding immediate and expensive TLB flush
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This commit is contained in:
Aiken Harris
2026-01-05 16:59:35 +01:00
parent 410286d012
commit 3a087766cc
1 changed files with 3 additions and 3 deletions
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6
xtoskrnl/mm/pte.cc
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@@ -319,6 +319,9 @@ MM::Pte::ReleaseSystemPtes(IN PMMPTE StartingPte,
PMMPTE NextPte, PreviousPte, ReleasedPte; PMMPTE NextPte, PreviousPte, ReleasedPte;
ULONG ClusterSize; ULONG ClusterSize;
/* Clear the PTEs before releasing them */
RtlZeroMemory(StartingPte, NumberOfPtes * MM::Paging::GetPteSize());
/* Raise runlevel and acquire lock to protect the PTE pool */ /* Raise runlevel and acquire lock to protect the PTE pool */
KE::RaiseRunLevel RunLevel(DISPATCH_LEVEL); KE::RaiseRunLevel RunLevel(DISPATCH_LEVEL);
KE::QueuedSpinLockGuard SpinLock(SystemSpaceLock); KE::QueuedSpinLockGuard SpinLock(SystemSpaceLock);
@@ -408,9 +411,6 @@ MM::Pte::ReleaseSystemPtes(IN PMMPTE StartingPte,
/* Link the new block into the free list */ /* Link the new block into the free list */
MM::Paging::SetNextEntry(StartingPte, MM::Paging::GetNextEntry(ReleasedPte)); MM::Paging::SetNextEntry(StartingPte, MM::Paging::GetNextEntry(ReleasedPte));
MM::Paging::SetNextEntry(ReleasedPte, MM::Paging::GetPteDistance(StartingPte, SystemPteBase)); MM::Paging::SetNextEntry(ReleasedPte, MM::Paging::GetPteDistance(StartingPte, SystemPteBase));
/* Flush the TLB to ensure address translation consistency */
AR::CpuFunc::FlushTlb();
} }
/** /**