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[NTOS:MM] Relax requirements with regards to PFN lock when adding & removing entries in Working Sets

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Once a page is used, holding the WS lock is enough until you want to free it.
This commit is contained in:
Jérôme Gardou 2021-05-11 12:03:52 +02:00 committed by Jérôme Gardou
parent aeffd16b38
commit 6a5fd8f487
3 changed files with 61 additions and 43 deletions
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9
ntoskrnl/mm/ARM3/miarm.h
View file

@ -1052,6 +1052,15 @@ MM_ANY_WS_LOCK_HELD(IN PETHREAD Thread)
(Thread->OwnsSessionWorkingSetShared));
}
FORCEINLINE
BOOLEAN
MM_ANY_WS_LOCK_HELD_EXCLUSIVE(_In_ PETHREAD Thread)
{
return ((Thread->OwnsProcessWorkingSetExclusive) ||
(Thread->OwnsSystemWorkingSetExclusive) ||
(Thread->OwnsSessionWorkingSetExclusive));
}
//
// Checks if the process owns the working set lock
//

6
ntoskrnl/mm/ARM3/procsup.c
View file

@ -993,6 +993,9 @@ MmInitializeProcessAddressSpace(IN PEPROCESS Process,
PageFrameNumber = PFN_FROM_PTE(PointerPte);
MiInitializePfn(PageFrameNumber, PointerPte, TRUE);
/* All our pages are now active & valid. Release the lock. */
MiReleasePfnLock(OldIrql);
/* This should be in hyper space, but not in the mapping range */
Process->Vm.VmWorkingSetList = MmWorkingSetList;
ASSERT(((ULONG_PTR)MmWorkingSetList >= MI_MAPPING_RANGE_END) && ((ULONG_PTR)MmWorkingSetList <= HYPER_SPACE_END));
@ -1016,9 +1019,6 @@ MmInitializeProcessAddressSpace(IN PEPROCESS Process,
/* Sanity check */
ASSERT(Process->PhysicalVadRoot == NULL);
/* Release PFN lock */
MiReleasePfnLock(OldIrql);
/* Release the process working set */
MiUnlockProcessWorkingSet(Process, PsGetCurrentThread());
#ifdef _M_AMD64

89
ntoskrnl/mm/ARM3/wslist.cpp
View file

@ -84,11 +84,15 @@ static void FreeWsleIndex(PMMWSL WsList, ULONG Index)
ASSERT(MiPteToAddress(PointerPte) != WsList);
PFN_NUMBER Page = PFN_FROM_PTE(PointerPte);
PMMPFN Pfn = MiGetPfnEntry(Page);
MI_SET_PFN_DELETED(Pfn);
MiDecrementShareCount(MiGetPfnEntry(Pfn->u4.PteFrame), Pfn->u4.PteFrame);
MiDecrementShareCount(Pfn, Page);
{
MiPfnLockGuard PfnLock;
PMMPFN Pfn = MiGetPfnEntry(Page);
MI_SET_PFN_DELETED(Pfn);
MiDecrementShareCount(MiGetPfnEntry(Pfn->u4.PteFrame), Pfn->u4.PteFrame);
MiDecrementShareCount(Pfn, Page);
}
PointerPte->u.Long = 0;
@ -172,8 +176,13 @@ static ULONG GetFreeWsleIndex(PMMWSL WsList)
PMMPTE PointerPte = MiAddressToPte(&WsList->Wsle[WsList->LastInitializedWsle]);
ASSERT(PointerPte->u.Hard.Valid == 0);
MMPTE TempPte = GetPteTemplateForWsList(WsList);
TempPte.u.Hard.PageFrameNumber = MiRemoveAnyPage(GetNextPageColorForWsList(WsList));
MiInitializePfnAndMakePteValid(TempPte.u.Hard.PageFrameNumber, PointerPte, TempPte);
{
MiPfnLockGuard PfnLock;
TempPte.u.Hard.PageFrameNumber = MiRemoveAnyPage(GetNextPageColorForWsList(WsList));
MiInitializePfnAndMakePteValid(TempPte.u.Hard.PageFrameNumber, PointerPte, TempPte);
}
WsList->LastInitializedWsle += PAGE_SIZE / sizeof(MMWSLE);
}
}
@ -187,8 +196,7 @@ VOID
RemoveFromWsList(PMMWSL WsList, PVOID Address)
{
/* Make sure that we are holding the right locks. */
ASSERT(MM_ANY_WS_LOCK_HELD(PsGetCurrentThread()));
MI_ASSERT_PFN_LOCK_HELD();
ASSERT(MM_ANY_WS_LOCK_HELD_EXCLUSIVE(PsGetCurrentThread()));
PMMPTE PointerPte = MiAddressToPte(Address);
@ -262,37 +270,37 @@ TrimWsList(PMMWSL WsList)
/* Please put yourself aside and make place for the younger ones */
PFN_NUMBER Page = PFN_FROM_PTE(PointerPte);
KIRQL OldIrql = MiAcquirePfnLock();
PMMPFN Pfn = MiGetPfnEntry(Page);
/* Not supported yet */
ASSERT(Pfn->u3.e1.PrototypePte == 0);
ASSERT(!MI_IS_ROS_PFN(Pfn));
/* FIXME: Remove this hack when possible */
if (Pfn->Wsle.u1.e1.LockedInMemory || (Pfn->Wsle.u1.e1.LockedInWs))
{
MiReleasePfnLock(OldIrql);
continue;
MiPfnLockGuard PfnLock;
PMMPFN Pfn = MiGetPfnEntry(Page);
/* Not supported yet */
ASSERT(Pfn->u3.e1.PrototypePte == 0);
ASSERT(!MI_IS_ROS_PFN(Pfn));
/* FIXME: Remove this hack when possible */
if (Pfn->Wsle.u1.e1.LockedInMemory || (Pfn->Wsle.u1.e1.LockedInWs))
{
continue;
}
/* We can remove it from the list. Save Protection first */
ULONG Protection = Entry.u1.e1.Protection;
RemoveFromWsList(WsList, Entry.u1.VirtualAddress);
/* Dirtify the page, if needed */
if (PointerPte->u.Hard.Dirty)
Pfn->u3.e1.Modified = 1;
/* Make this a transition PTE */
MI_MAKE_TRANSITION_PTE(PointerPte, Page, Protection);
KeInvalidateTlbEntry(MiAddressToPte(PointerPte));
/* Drop the share count. This will take care of putting it in the standby or modified list. */
MiDecrementShareCount(Pfn, Page);
}
/* We can remove it from the list. Save Protection first */
ULONG Protection = Entry.u1.e1.Protection;
RemoveFromWsList(WsList, Entry.u1.VirtualAddress);
/* Dirtify the page, if needed */
if (PointerPte->u.Hard.Dirty)
Pfn->u3.e1.Modified = 1;
/* Make this a transition PTE */
MI_MAKE_TRANSITION_PTE(PointerPte, Page, Protection);
KeInvalidateTlbEntry(MiAddressToPte(PointerPte));
/* Drop the share count. This will take care of putting it in the standby or modified list. */
MiDecrementShareCount(Pfn, Page);
MiReleasePfnLock(OldIrql);
Ret++;
}
return Ret;
@ -302,6 +310,7 @@ TrimWsList(PMMWSL WsList)
extern "C"
{
_Use_decl_annotations_
VOID
NTAPI
MiInsertInWorkingSetList(
@ -311,9 +320,8 @@ MiInsertInWorkingSetList(
{
PMMWSL WsList = Vm->VmWorkingSetList;
/* Make sure that we are holding the right locks. */
ASSERT(MM_ANY_WS_LOCK_HELD(PsGetCurrentThread()));
MI_ASSERT_PFN_LOCK_HELD();
/* Make sure that we are holding the WS lock. */
ASSERT(MM_ANY_WS_LOCK_HELD_EXCLUSIVE(PsGetCurrentThread()));
PMMPTE PointerPte = MiAddressToPte(Address);
@ -345,6 +353,7 @@ MiInsertInWorkingSetList(
Vm->PeakWorkingSetSize = Vm->WorkingSetSize;
}
_Use_decl_annotations_
VOID
NTAPI
MiRemoveFromWorkingSetList(
@ -356,7 +365,7 @@ MiRemoveFromWorkingSetList(
Vm->WorkingSetSize -= PAGE_SIZE;
}
_Requires_exclusive_lock_held_(WorkingSet->WorkingSetMutex)
_Use_decl_annotations_
VOID
NTAPI
MiInitializeWorkingSetList(_Inout_ PMMSUPPORT WorkingSet)