Maurizio Lombardi wrote:
On 11/4/06, Mikulas Patocka <[email protected]> wrote:
free space is organized in lists of free runs
and converted to bitmap only in case of
extreme fragmentation.
There is a performance reason to prefer lists of free blocks rather than
bitmap?
I read from [Tanenbaum: Operating System, Design and Implementation II
ed. ] that lists are better than bitmap only when disk is almost full.
Yes, if you have a truly random access medium.
If you have media like physical disks, where fragmentation costs you,
the lists will kill you dead in no time at all.
-hpa
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