Hi Nomura-san, On 07/10/09 07:16, Jun'ichi Nomura wrote: > Hi Yasui-san, > > Takahiro Yasui wrote: >> This is a prototype patch to fix data corruption issue on dm-raid1. >> It is just a draft patch and is not tested well, but let me post it >> to review and discuss this in-kernel superblock approach. >> >> I appreciate your comments and suggestions. > <snip> >> * Introduce superblock area >> >> A superblock area is related to a mirror leg on a one-to-one basis and >> keeps a sequential number to decide the default mirror when the mirror >> is resumed. > > If you are to introduce kernel-managed RAID1 superblock, > isn't it possible to use the on-disk format compatible to md's? > Then the kernel code to handle the superblock may be shared between > md and dm in future, which I think is even better and would help > dm/md convergence. Thank you for the comment. You are right and sharing the kernel code to handle superblock between md and dm would be better toward merging dm/md. I would like to introduce this in-kernel superblock approach, but userspace approach handled by dmeventd seems to be preferred. I try to check the possibility to reduce overhead of error handling in userspace. Thanks, Taka -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
