[dm-devel] [PATCH 9/9] dm crypt: sort writes

[Akira Hayakawa]

> OK.  FYI, I cleaned the code up a little today based on Milan's dislike
> for the #define within the function, see:
> https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=for-next&id=039e943277604c3f4f6b4ee803b8793627d53d36

Thanks Mike, I did it last night (feature/sorted-writeback branch)
https://github.com/akiradeveloper/dm-writeboost/tree/feature/sorted-writeback/src

The codes in dm-crypt and dm-thin really helped.

Confirmed actually sorted.

Outline:
- In dm-writeboost.h
-- struct migrate_io is defined
- In dm-writeboost-daemon.c
-- prepare_migrate_ios() adds all migrate I/Os into the tree (add_migrate_io() is called for each)
-- submit_migrate_ios() tasks them out one by one in sorted order of pair (address, id) (compare_migrate_io() is the comparator)

--
Akira