## Virtual Device Driver Reference for OS/2

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### VDHGetDirtyPageInfo - Purpose

Context Issues: This function can be called only in the task context.

DOS Session Terminations: There are no DOS session termination implications for this function.

Notes: The virtual dirty bits remain set until cleared by this function, regardless of the swapping activity that has occurred. The actual dirty bits in the page tables are reset whenever a page is swapped to the swap device and brought back into memory. This function is valid only for linear addresses up to 110000H (1MB+64KB) in a DOS session.