Hi Neil, This is the updated patch for the raid5 write hole issue. I thought I addressed most of issues from you and Christoph. Please let me know if anything is missed. Something not done yet: - Still use NOFAIL allocation. I don't think 2-element mempool is ok. An io_unit will have several bio (> 2), 2 element bioset isn't ok. We can dispatch all bio of the io_unit if bio allocation fails, but this will increase complexity. I'd prefer using NOFAIL allocation now for simplicity and fix it later if necessary - Add flag for reshape handling in disk format, but don't support it yet Thanks, Shaohua Shaohua Li (9): md: override md superblock recovery_offset for journal device raid5: export some functions raid5: add a new state for stripe log handling raid5: add basic stripe log raid5: log reclaim support raid5: log recovery raid5: disable batch with log enabled raid5: don't allow resize/reshape with cache(log) support raid5: enable log for raid array with cache disk Song Liu (2): MD: replace special disk roles with macros MD: add a new disk role to present write journal device drivers/md/Makefile | 2 +- drivers/md/md.c | 44 +- drivers/md/md.h | 13 +- drivers/md/raid5-cache.c | 1094 ++++++++++++++++++++++++++++++++++++++++ drivers/md/raid5.c | 137 +++-- drivers/md/raid5.h | 20 + include/uapi/linux/raid/md_p.h | 70 ++- 7 files changed, 1320 insertions(+), 60 deletions(-) create mode 100644 drivers/md/raid5-cache.c -- 1.8.1 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
