Re: [PATCH 0/6 EARLY RFC] Btrfs: Get rid of whole page I/O.

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Hello David,

> I looked at previous postings of this patchset, but haven't found what
> are the expected supported block sizes.
> 
> I assume powers of two starting with 512b, until 64k.

The earlier patchset posted by Chandra Seethraman was to get 4k
blocksize to work with ppc64's 64k PAGE_SIZE. I chose to do 2k
blocksize on x86_64's 4k PAGE_SIZE since that would allow others in
the community to work/experiment with subpagesize-blocksize feature.

The root node of "tree root" tree has 1957 bytes being written by
make_btrfs() (in btrfs-progs).  Hence I chose to do 2k blocksize for
the initial subpagesize-blocksize work. So with this patchset the
supported blocksizes would be in the range 2k-64k.

Thanks,
chandan

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