[LU-13473] page discard of non-composite file does not set mirror info

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0, Lustre 2.12.6
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

the lov_io_mirror_init() assertion failed "LASSERT(comp->lo_preferred_mirror == 0)" when a page is discarded for a plain file.