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- Implement the rest of the nonpaged pool allocator, now with support for allocating pages in the nonpaged pool expansion area.

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- This uses System PTEs, so if you're still not sick of the same old mantra -- optimizations to the former will help the latter.
    - Additionally, we should eventually implement a single-page SLIST for nonpaged pool pages, which will greately improve allocate/free of 1 page.
- As a reminder, this code isn't being used yet.

svn path=/trunk/; revision=41933
This commit is contained in:
ReactOS Portable Systems Group 2009-07-12 13:02:05 +00:00
parent d9b66b43bd
commit 1279c44e6c
1 changed files with 72 additions and 6 deletions
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78
reactos/ntoskrnl/mm/ARM3/pool.c
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@ -130,11 +130,12 @@ NTAPI
MiAllocatePoolPages(IN POOL_TYPE PoolType,
IN SIZE_T SizeInBytes)
{
PFN_NUMBER SizeInPages;
PFN_NUMBER SizeInPages, PageFrameNumber;
ULONG i;
KIRQL OldIrql;
PLIST_ENTRY NextEntry, NextHead, LastHead;
PMMPTE PointerPte;
PMMPTE PointerPte, StartPte;
MMPTE TempPte;
PMMPFN Pfn1;
PVOID BaseVa;
PMMFREE_POOL_ENTRY FreeEntry;
@ -258,13 +259,78 @@ MiAllocatePoolPages(IN POOL_TYPE PoolType,
// If we got here, we're out of space.
// Start by releasing the lock
//
KeReleaseQueuedSpinLock (LockQueueMmNonPagedPoolLock, OldIrql);
KeReleaseQueuedSpinLock(LockQueueMmNonPagedPoolLock, OldIrql);
//
// Allocate some system PTEs
//
StartPte = MiReserveSystemPtes(SizeInPages, NonPagedPoolExpansion);
PointerPte = StartPte;
if (StartPte == NULL)
{
//
// Ran out of memory
//
DPRINT1("Out of NP Expansion Pool\n");
return NULL;
}
//
// We should now go into expansion nonpaged pool
// Acquire the pool lock now
//
DPRINT1("Out of NP Pool\n");
return NULL;
OldIrql = KeAcquireQueuedSpinLock(LockQueueMmNonPagedPoolLock);
//
// Lock the PFN database too
//
//KeAcquireQueuedSpinLockAtDpcLevel(LockQueuePfnLock);
//
// Loop the pages
//
TempPte = HyperTemplatePte;
do
{
//
// Allocate a page
//
PageFrameNumber = MmAllocPage(MC_NPPOOL, 0);
//
// Get the PFN entry for it
//
Pfn1 = MiGetPfnEntry(PageFrameNumber);
//
// Write the PTE for it
//
TempPte.u.Hard.PageFrameNumber = PageFrameNumber;
ASSERT(PointerPte->u.Hard.Valid == 0);
ASSERT(TempPte.u.Hard.Valid == 1);
*PointerPte++ = TempPte;
} while (--SizeInPages > 0);
//
// This is the last page
//
Pfn1->u3.e1.EndOfAllocation = 1;
//
// Get the first page and mark it as such
//
Pfn1 = MiGetPfnEntry(StartPte->u.Hard.PageFrameNumber);
Pfn1->u3.e1.StartOfAllocation = 1;
//
// Release the PFN and nonpaged pool lock
//
//KeReleaseQueuedSpinLockFromDpcLevel(LockQueuePfnLock);
KeReleaseQueuedSpinLock(LockQueueMmNonPagedPoolLock, OldIrql);
//
// Return the address
//
return MiPteToAddress(StartPte);
}
ULONG