Saturday, March 19, 2005

Memory Manager preliminar Design

Me and Ponniah has started the coding for memory manager preliminary code few weeks ago. The sequence of events after memory manager starts are:
1. Counts the number of pages in the Main Memory:
This is done by writing a value to a start of a page and then reading it again. If the written and read value are the same then the page exists else page doesnot exsits. A counter is incremented if page exists. The value of counter is the number of pages.

2. Create a bit map for the Occupied Pages:
Initally grub loads some modules in the memory those pages are to be found from the Kernel's command line arguments and those pages are marked as used. A page is allocated for creating this bit map.

3. Allocating a Page and Deallocating a Page are to be coded.

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