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Compute PTE count per page from entry size
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This commit is contained in:
Aiken Harris
2025-12-15 13:56:39 +01:00
parent 36c273ea13
commit 7f0ca6a948
4 changed files with 21 additions and 9 deletions
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8
xtoskrnl/mm/mmgr.cc
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@@ -38,10 +38,12 @@ MM::Manager::InitializeMemoryLayout(VOID)
{
ULONG_PTR PagedPoolSize, PteCount;
PFN_NUMBER PfnDatabaseSize;
ULONG PtesPerPage;
/* Calculate size of paged pool (at least 32MiB) */
PteCount = ((SIZE_TO_PAGES(33554432) + (MM_PTE_PER_PAGE - 1)) / MM_PTE_PER_PAGE);
PagedPoolSize = PteCount * MM_PTE_PER_PAGE * MM_PAGE_SIZE;
/* Get the number of PTEs per page and calculate size of paged pool (at least 32MiB) */
PtesPerPage = MM::Pte::GetPtesPerPage();
PteCount = ((SIZE_TO_PAGES(33554432) + (PtesPerPage - 1)) / PtesPerPage);
PagedPoolSize = PteCount * PtesPerPage * MM_PAGE_SIZE;
/* Retrieve the PFN database size */
PfnDatabaseSize = MM::Pfn::GetPfnDatabaseSize();