[LU-9129] deadlock in direct IO

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.0
• Severity: 3
• Assignee: Jinshan Xiong (Inactive)
• Reporter: Jinshan Xiong (Inactive)

Description

ll_writepages() should ignore layout change otherwise it would cause deadlock in direct IO. This is because ll_writepages() would be called inside the direct IO context and if the layout has been changed during this time, the layout_conf() has to wait for active IO to complete before applying the layout change.

Patch is coming soon.