CcScheduleReadAhead - NtDoc
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headers
// ntifs.h
VOID CcScheduleReadAhead(
[in] PFILE_OBJECT FileObject,
[in] PLARGE_INTEGER FileOffset,
[in] ULONG Length
);
View the official Windows Driver Kit DDI referenceNo description available.
The CcScheduleReadAhead routine performs read-ahead (also called "lazy read") on a cached file. CcScheduleReadAhead should never be called directly. The CcReadAhead macro should be called instead.
FileObject [in]Pointer to a file object for the file on which read-ahead is to be performed.
FileOffset [in]Pointer to a variable that specifies the starting byte offset within the cached file where the last read occurred.
Length [in]Length in bytes of the range that was last read.
The CcReadAhead macro is a wrapper for CcScheduleReadAhead. It calls CcScheduleReadAhead only if Length >= 256. Measurements have shown that calling CcScheduleReadAhead for smaller reads actually decreases performance.
CcReadAhead and CcScheduleReadAhead can only be called after a successful call to CcCopyRead, CcFastCopyRead, or CcMdlRead.
CcScheduleReadAhead
CcSetAdditionalCacheAttributes