v10b misses the checkpoint_sort part of the patch, and thus cannot be
applied.
Yes, indeed, the second part is expected to be applied on top of v10a.
Oh, sorry. I'd somehow assumed they were two variants of the same patch
(one with "slim" sorting and the other without).
The idea is that as these two features could be committed separately.
However, experiments show that flushing is really efficient when sorting
is done first, and moreover the two features conflict, so I've made two
dependent patches.
--
Fabien.
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