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- Allocate memory for mdl's for paging io from stack instead of the non paged pool.

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svn path=/trunk/; revision=9636
This commit is contained in:
Hartmut Birr 2004-06-06 09:13:21 +00:00
parent efc9160052
commit 1d4397159c
1 changed files with 19 additions and 13 deletions
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32
reactos/ntoskrnl/mm/pagefile.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: pagefile.c,v 1.46 2004/06/06 07:52:22 hbirr Exp $
/* $Id: pagefile.c,v 1.47 2004/06/06 09:13:21 hbirr Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/pagefile.c
@ -191,13 +191,15 @@ MmGetOffsetPageFile(PGET_RETRIEVAL_DESCRIPTOR RetrievalPointers, LARGE_INTEGER O
#endif
}
NTSTATUS MmWriteToSwapPage(SWAPENTRY SwapEntry, PMDL Mdl)
NTSTATUS MmWriteToSwapPage(SWAPENTRY SwapEntry, PHYSICAL_ADDRESS* Page)
{
ULONG i, offset;
LARGE_INTEGER file_offset;
IO_STATUS_BLOCK Iosb;
NTSTATUS Status;
KEVENT Event;
UCHAR MdlBase[sizeof(MDL) + sizeof(ULONG)];
PMDL Mdl = (PMDL)MdlBase;
DPRINT("MmWriteToSwapPage\n");
@ -222,6 +224,9 @@ NTSTATUS MmWriteToSwapPage(SWAPENTRY SwapEntry, PMDL Mdl)
KEBUGCHECK(0);
}
MmInitializeMdl(Mdl, NULL, PAGE_SIZE);
MmBuildMdlFromPages(Mdl, (PULONG)Page);
file_offset.QuadPart = offset * PAGE_SIZE;
file_offset = MmGetOffsetPageFile(PagingFileList[i]->RetrievalPointers, file_offset);
@ -234,18 +239,21 @@ NTSTATUS MmWriteToSwapPage(SWAPENTRY SwapEntry, PMDL Mdl)
if (Status == STATUS_PENDING)
{
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
return(Iosb.Status);
Status = Iosb.Status;
}
MmUnmapLockedPages(Mdl->MappedSystemVa, Mdl);
return(Status);
}
NTSTATUS MmReadFromSwapPage(SWAPENTRY SwapEntry, PMDL Mdl)
NTSTATUS MmReadFromSwapPage(SWAPENTRY SwapEntry, PHYSICAL_ADDRESS* Page)
{
ULONG i, offset;
LARGE_INTEGER file_offset;
IO_STATUS_BLOCK Iosb;
NTSTATUS Status;
KEVENT Event;
UCHAR MdlBase[sizeof(MDL) + sizeof(ULONG)];
PMDL Mdl = (PMDL)MdlBase;
DPRINT("MmReadFromSwapPage\n");
@ -270,6 +278,9 @@ NTSTATUS MmReadFromSwapPage(SWAPENTRY SwapEntry, PMDL Mdl)
KEBUGCHECK(0);
}
MmInitializeMdl(Mdl, NULL, PAGE_SIZE);
MmBuildMdlFromPages(Mdl, (PULONG)Page);
file_offset.QuadPart = offset * PAGE_SIZE;
file_offset = MmGetOffsetPageFile(PagingFileList[i]->RetrievalPointers, file_offset);
@ -282,8 +293,9 @@ NTSTATUS MmReadFromSwapPage(SWAPENTRY SwapEntry, PMDL Mdl)
if (Status == STATUS_PENDING)
{
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
return(Iosb.Status);
Status = Iosb.Status;
}
MmUnmapLockedPages(Mdl->MappedSystemVa, Mdl);
return(Status);
}
@ -538,14 +550,8 @@ MmDumpToPagingFile(ULONG BugCode,
}
/* Initialize the MDL. */
Mdl->Next = NULL;
Mdl->Size = sizeof(MDL) + sizeof(PVOID);
Mdl->MdlFlags = MDL_SOURCE_IS_NONPAGED_POOL;
Mdl->Process = NULL;
Mdl->MappedSystemVa = MmCoreDumpPageFrame;
Mdl->StartVa = NULL;
Mdl->ByteCount = PAGE_SIZE;
Mdl->ByteOffset = 0;
MmInitializeMdl(Mdl, MmCoreDumpPageFrame, PAGE_SIZE);
Mdl->MdlFlags = MDL_PAGES_LOCKED|MDL_IO_PAGE_READ|MDL_SOURCE_IS_NONPAGED_POOL;
MdlMap = (PULONG)(Mdl + 1);