I did some experimenting with converting the DAX radix tree from storing sector numbers to storing pfn_t. While we're not ready to do that conversion yet, these pieces make sense to at least get reviewed now, and maybe get upstream.
I think the first patch is worthwhile all by itself as a stepping stone to making SG lists contain PFNs instead of pages. Matthew Wilcox (3): pfn_t: Change the encoding pfn_t: Support for huge PFNs pfn_t: New functions pfn_t_add and pfn_t_cmp include/linux/pfn_t.h | 72 +++++++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 61 insertions(+), 11 deletions(-) -- 2.7.0
