[LU-15030] Add /debugfs interface to monitor the sync progress between MDT and OST

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: Hongchao Zhang
• Reporter: Hongchao Zhang

Description

During sync between MDT and OSTs by "lctl set_param -n osc*.MDT.force_sync=1",
it could need much more time if the load on OST is very high, it will be better to have
some kind of /debugfs interface to know the sync progress and make sure the sync is moving

Issue Links

• is related to: LU-15114 ASSERTION( atomic_read(&d->opd_sync_changes) > 0