https://git.reactos.org/?p=reactos.git;a=commitdiff;h=a93e065ebce692289cec49af0e686122be479fbf
commit a93e065ebce692289cec49af0e686122be479fbf
Author: Jérôme Gardou <jerome.gar...@reactos.org>
AuthorDate: Tue Feb 23 11:07:35 2021 +0100
Commit: Jérôme Gardou <jerome.gar...@reactos.org>
CommitDate: Fri Feb 26 08:46:53 2021 +0100
[NTOS:MM] Do not chunk-read file when we are the modified-page-writer thread
---
ntoskrnl/mm/section.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/ntoskrnl/mm/section.c b/ntoskrnl/mm/section.c
index ea56635b72f..b3e300a58cc 100644
--- a/ntoskrnl/mm/section.c
+++ b/ntoskrnl/mm/section.c
@@ -1200,8 +1200,10 @@ MmMakeSegmentResident(
if (!NT_SUCCESS(Status))
return Status;
- /* If the file is not random access, read a 64K Chunk. */
- if (!FlagOn(FileObject->Flags, FO_RANDOM_ACCESS))
+ /* If the file is not random access and we are not the page out thread
+ * read a 64K Chunk. */
+ if (((ULONG_PTR)IoGetTopLevelIrp() != FSRTL_MOD_WRITE_TOP_LEVEL_IRP)
+ && !FlagOn(FileObject->Flags, FO_RANDOM_ACCESS))
{
RangeStart = Offset - (Offset % _64K);
if (RangeEnd % _64K)
