06/07: [NTOSKRNL] Store page file sizes in pages, not in bytes

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=e392bdf962d278fa7ee7d…

commit e392bdf962d278fa7ee7dd0c2aeaf6658d8bef03
Author:     Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Thu Aug 16 13:50:16 2018 +0200
Commit:     Pierre Schweitzer <pierre(a)reactos.org>
CommitDate: Thu Aug 16 13:50:16 2018 +0200

    [NTOSKRNL] Store page file sizes in pages, not in bytes
---
 ntoskrnl/include/internal/mm.h |  6 +++---
 ntoskrnl/mm/pagefile.c         | 10 +++++-----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/ntoskrnl/include/internal/mm.h b/ntoskrnl/include/internal/mm.h
index 9739d62709..ca82fd87d9 100644
--- a/ntoskrnl/include/internal/mm.h
+++ b/ntoskrnl/include/internal/mm.h
@@ -426,9 +426,9 @@ extern MM_MEMORY_CONSUMER MiMemoryConsumers[MC_MAXIMUM];
 /* Page file information */
 typedef struct _MMPAGING_FILE
 {
-    LARGE_INTEGER CurrentSize;
-    LARGE_INTEGER MaximumSize;
-    LARGE_INTEGER MinimumSize;
+    PFN_NUMBER CurrentSize;
+    PFN_NUMBER MaximumSize;
+    PFN_NUMBER MinimumSize;
     PFN_NUMBER FreePages;
     PFN_NUMBER UsedPages;
     PFILE_OBJECT FileObject;
diff --git a/ntoskrnl/mm/pagefile.c b/ntoskrnl/mm/pagefile.c
index 784495d444..dd24fe7d5b 100644
--- a/ntoskrnl/mm/pagefile.c
+++ b/ntoskrnl/mm/pagefile.c
@@ -635,7 +635,7 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
         }
 
         /* Don't allow page file shrinking */
-        if (PagingFile->MinimumSize.QuadPart > SafeMinimumSize.QuadPart)
+        if (PagingFile->MinimumSize > (SafeMinimumSize.QuadPart >>
PAGE_SHIFT))
         {
             KeReleaseGuardedMutex(&MmPageFileCreationLock);
             ObDereferenceObject(FileObject);
@@ -645,7 +645,7 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
             return STATUS_INVALID_PARAMETER_2;
         }
 
-        if (SafeMaximumSize.QuadPart < PagingFile->MaximumSize.QuadPart)
+        if ((SafeMaximumSize.QuadPart >> PAGE_SHIFT) <
PagingFile->MaximumSize)
         {
             KeReleaseGuardedMutex(&MmPageFileCreationLock);
             ObDereferenceObject(FileObject);
@@ -740,9 +740,9 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
 
     PagingFile->FileHandle = FileHandle;
     PagingFile->FileObject = FileObject;
-    PagingFile->MaximumSize.QuadPart = SafeMaximumSize.QuadPart;
-    PagingFile->CurrentSize.QuadPart = SafeMinimumSize.QuadPart;
-    PagingFile->MinimumSize.QuadPart = SafeMinimumSize.QuadPart;
+    PagingFile->MaximumSize = (SafeMaximumSize.QuadPart >> PAGE_SHIFT);
+    PagingFile->CurrentSize = (SafeMinimumSize.QuadPart >> PAGE_SHIFT);
+    PagingFile->MinimumSize = (SafeMinimumSize.QuadPart >> PAGE_SHIFT);
     PagingFile->FreePages = (ULONG)(SafeMinimumSize.QuadPart / PAGE_SIZE);
     PagingFile->UsedPages = 0;
     PagingFile->PageFileName = PageFileName;