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Allow PFN insertion at the beginning of standby list
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This commit is contained in:
Aiken Harris
2026-01-05 19:36:12 +01:00
parent 3a087766cc
commit 154ca7be35
2 changed files with 26 additions and 8 deletions
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6
xtoskrnl/includes/mm/pfn.hh
View File

@@ -40,9 +40,11 @@ namespace MM
STATIC XTAPI PFN_NUMBER AllocatePhysicalPage(IN ULONG Color); STATIC XTAPI PFN_NUMBER AllocatePhysicalPage(IN ULONG Color);
STATIC XTAPI VOID ComputePfnDatabaseSize(VOID); STATIC XTAPI VOID ComputePfnDatabaseSize(VOID);
STATIC XTAPI VOID DecrementReferenceCount(IN PMMPFN Pfn1, STATIC XTAPI VOID DecrementReferenceCount(IN PMMPFN Pfn1,
IN PFN_NUMBER PageFrameIndex); IN PFN_NUMBER PageFrameIndex,
IN BOOLEAN BeginStandbyList = FALSE);
STATIC XTAPI VOID DecrementShareCount(IN PMMPFN Pfn1, STATIC XTAPI VOID DecrementShareCount(IN PMMPFN Pfn1,
IN PFN_NUMBER PageFrameIndex); IN PFN_NUMBER PageFrameIndex,
IN BOOLEAN BeginStandbyList = FALSE);
STATIC XTAPI VOID FreePhysicalPage(IN PMMPTE PointerPte); STATIC XTAPI VOID FreePhysicalPage(IN PMMPTE PointerPte);
STATIC XTAPI ULONG_PTR GetHighestPhysicalPage(VOID); STATIC XTAPI ULONG_PTR GetHighestPhysicalPage(VOID);
STATIC XTAPI ULONGLONG GetNumberOfPhysicalPages(VOID); STATIC XTAPI ULONGLONG GetNumberOfPhysicalPages(VOID);

26
xtoskrnl/mm/pfn.cc
View File

@@ -138,6 +138,9 @@ MM::Pfn::DecrementAvailablePages(VOID)
* @param PageFrameIndex * @param PageFrameIndex
* The page frame number of the physical page. * The page frame number of the physical page.
* *
* @param BeginStandbyList
* Determines whether the page should be added to the beginning of the standby list.
*
* @return This routine does not return any value. * @return This routine does not return any value.
* *
* @since XT 1.0 * @since XT 1.0
@@ -145,7 +148,8 @@ MM::Pfn::DecrementAvailablePages(VOID)
XTAPI XTAPI
VOID VOID
MM::Pfn::DecrementReferenceCount(IN PMMPFN PageFrameNumber, MM::Pfn::DecrementReferenceCount(IN PMMPFN PageFrameNumber,
IN PFN_NUMBER PageFrameIndex) IN PFN_NUMBER PageFrameIndex,
IN BOOLEAN BeginStandbyList)
{ {
/* Decrement the PFN reference count */ /* Decrement the PFN reference count */
PageFrameNumber->u3.e2.ReferenceCount--; PageFrameNumber->u3.e2.ReferenceCount--;
@@ -203,9 +207,17 @@ MM::Pfn::DecrementReferenceCount(IN PMMPFN PageFrameNumber,
else else
{ {
/* Link clean page to the standby list */ /* Link clean page to the standby list */
if(BeginStandbyList)
{
UNIMPLEMENTED;
}
else
{
/* Link clean page to the end of the standby list */
LinkPage(&StandbyPagesList, PageFrameIndex); LinkPage(&StandbyPagesList, PageFrameIndex);
} }
} }
}
} }
/** /**
@@ -217,6 +229,9 @@ MM::Pfn::DecrementReferenceCount(IN PMMPFN PageFrameNumber,
* @param PageFrameIndex * @param PageFrameIndex
* The page frame number of the physical page. * The page frame number of the physical page.
* *
* @param BeginStandbyList
* Determines whether the page should be added to the beginning of the standby list.
*
* @return This routine does not return any value. * @return This routine does not return any value.
* *
* @since XT 1.0 * @since XT 1.0
@@ -224,7 +239,8 @@ MM::Pfn::DecrementReferenceCount(IN PMMPFN PageFrameNumber,
XTAPI XTAPI
VOID VOID
MM::Pfn::DecrementShareCount(IN PMMPFN PageFrameNumber, MM::Pfn::DecrementShareCount(IN PMMPFN PageFrameNumber,
IN PFN_NUMBER PageFrameIndex) IN PFN_NUMBER PageFrameIndex,
IN BOOLEAN BeginStandbyList)
{ {
/* Ensure the page is in a valid state */ /* Ensure the page is in a valid state */
if((PageFrameNumber->u3.e1.PageLocation != ActiveAndValid) && if((PageFrameNumber->u3.e1.PageLocation != ActiveAndValid) &&
@@ -280,7 +296,7 @@ MM::Pfn::DecrementShareCount(IN PMMPFN PageFrameNumber,
else else
{ {
/* The PTE can not be removed yet, decrement the reference count */ /* The PTE can not be removed yet, decrement the reference count */
DecrementReferenceCount(PageFrameNumber, PageFrameIndex); DecrementReferenceCount(PageFrameNumber, PageFrameIndex, BeginStandbyList);
} }
} }
else else
@@ -317,13 +333,13 @@ MM::Pfn::FreePhysicalPage(IN PMMPTE PointerPte)
PageTableFrame = MM::Pfn::GetPfnEntry(PageTableFrameNumber); PageTableFrame = MM::Pfn::GetPfnEntry(PageTableFrameNumber);
/* Decrement the share count of the page table */ /* Decrement the share count of the page table */
MM::Pfn::DecrementShareCount(PageTableFrame, PageTableFrameNumber); MM::Pfn::DecrementShareCount(PageTableFrame, PageTableFrameNumber, FALSE);
/* Mark the PTE as being ready for removal */ /* Mark the PTE as being ready for removal */
MM::Paging::SetPte(PageFrame->PteAddress, MM::Paging::GetPte(PageFrame->PteAddress) | 1); MM::Paging::SetPte(PageFrame->PteAddress, MM::Paging::GetPte(PageFrame->PteAddress) | 1);
/* Decrement the share count of the page */ /* Decrement the share count of the page */
MM::Pfn::DecrementShareCount(PageFrame, PageFrameNumber); MM::Pfn::DecrementShareCount(PageFrame, PageFrameNumber, FALSE);
} }
/** /**