Christoph Lameter wrote:
On Thu, 26 Apr 2007, Nick Piggin wrote:
Nick, what's the buffer layer? Are you talking about operations
based on bufferheads?
Yeah. Our pgoff_t->sector_t translation.
Sadly the buffers in the buffer layer still assume contiguous memory. You
would have to add a series of pointers there and then add a layer to
handle this.
That's the least of the problems with rewriting the buffer layer.
But I maintain that the end result is better than the fragmentation
based approach. A lot of people don't actually want a bigger page
cache size, because they want efficient internal fragmentation as
well, so your radix-tree based approach isn't really comparable.
--
SUSE Labs, Novell Inc.
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