[LU-14907] VM_WRITE should not trigger layout write

• Status: Open
• Project: Lustre
• Type: Bug
• Priority: Minor
• Reporter: Qian Yingjin
• Assignee: Qian Yingjin
• Resolution: Unresolved
• Severity: 3

Description

VM area marked with VM_WRITE means that pages may be written, but mmap page write may ne ver happen.
It should delay layout write until the actual modification on the file happen in ->page_mkwrite().
Otherwise, it will trigger panic for PCC-RO sanity-pcc test_21f().

Fixes: f2d1c4ee4 ("LU-14647 flr: mmap write/punch does not stale other mirrors")

Comments

[Gerrit Updater]

Andreas Dilger ([e-mail]) uploaded a new patch: https://review.whamcloud.com/44483
Subject: LU-14907 pcc: VM_WRITE should not trigger layout write
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: de1fe260d8c88112b46857d69cf5fe9e5d06cfbd