On Jun 26, 2007  12:35 +1000, Nick Piggin wrote:

Leaving my opinion of higher order pagecache aside, this _may_ be an
example of something that doesn't need a lot of attention, because it
should be fairly uncontroversial from a filesystem's POV? (eg. it is
more a relevant item to memory management and possibly block layer).
OTOH if it is discussed in the context of "large blocks in the buffer
layer is crap because we can do it with higher order pagecache", then
that might be interesting :)

FWIW, being able to have large (8-64kB) blocksize would be great for
ext2/3/4.  We'd sort of been betting on this by limiting the on-disk
extent format to 48-bit physical block numbers, and to have 2 patches
to implement this in as many weeks is excellent.

To me the mechanism doesn't matter, whether through fsblock or high-order
PAGE_SIZE.  I'll let the rest of you duke it out as long as at least one
of them makes it into the kernel.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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