mempool_t
struct bio_set
IO-CPU affinity
- http://barriosstory.blogspot.de/2009/01/add-support-for-io-cpu-affinity.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c7c22e4d5c1fdebfac4dba76de7d0338c2b0d832
커널 동기화 - 어떤 락을 써야나
drivers/md: dm & md