"Peter T. Breuer" wrote:

"A month of sundays ago Paul Clements wrote:"

quoted

* allowing the bitmap to be rescaled -- i.e., changing the amount of
data that each bit represents

I really don't agree with that :-).  But maybe it can be done!  It's
just I personally see no way anyone can count in anything except 1K
blocks with the current raid code the way it is.

Originally I wrote the patch with more generality, but realized that the
generality could never be made use of - there are too many assumptions
in the extant raid code that one block = 1KB.

The translation from 1K blocks to whatever-sized bitmap blocks (or
"chunks") will be done only when marking or unmarking the bitmap (and
incrementing/decrementing the block counters). The block counters allow
us to know when multiple 1K block writes are actually on the same
"chunk" so that everything is handled correctly.

--
Paul