Eric, > Ok so `git blame` shows that Kent added this to md/raid5.c in > c78afc6261b (Kent Overstreet 2013-07-11 22:39:53 -0700 7526) Yep. > Do you think we should leave the md-specific > raid_partial_stripes_expensive setting and require users of RAID > controllers to set the bit themselves in bcache---or---remove all > raid_partial_stripes_expensive code and always treat writes as > "expensive" when `opt_io` is defined? I'd prefer the latter since that was the very intent of exporting the device topology in an abstract and protocol-independent fashion. However, I don't know enough about bcache internals to know whether it is always the right choice, what the trade-offs are, etc. -- Martin K. Petersen Oracle Linux Engineering
