[LU-18152] Use __fput_sync when available

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Severity: 3
• Assignee: Shaun Tancheff
• Reporter: Shaun Tancheff

Description

If __fput_sync() is exported then prefer it when closing files created with alloc_file_pseudo() to avoid performance regression associated with flush_delayed_fput()

Issue Links

• is related to: LU-18463 mdtest perfomance degradation after LU-16973