rgoldwyn@xxxxxxx writes: > The processing of METADATA_UPDATED message is too simple and prone to > errors. Besides, it would not update the internal data structures as > required. > > This set of patches reads the superblock from one of the device of the MD > and checks for changes in the in-memory data structures. If there is a change, > it performs the necessary actions to keep the internal data structures > as it would be in the primary node. > > An example is if a devices turns faulty. The algorithm is: > > 1. The initiator node marks the device as faulty and updates the superblock > 2. The initiator node sends METADATA_UPDATED with an advisory device number to the rest of the nodes. > 3. The receiving node on receiving the METADATA_UPDATED message > 3.1 Reads the superblock > 3.2 Detects a device has failed by comparing with memory structure > 3.3 Calls the necessary functions to record the failure and get the device out of the active array. > 3.4 Acknowledges the message. > > The patch series also fixes adding the disk which was impacted because of > the changes. > > Patches can also be found at > https://github.com/goldwynr/linux branch md-next > > Changes since V2: > - Fix status synchrnoization after --add and --re-add operations > - Included Guoqing's patches on endian correctness, zeroing cmsg etc > - Restructure add_new_disk() and cancel() Thanks a lots. Looks good. I have pull all this in and will push it out shortly. Thanks, NeilBrown
Attachment:
signature.asc
Description: PGP signature
