[LU-6199] ldiskfs kernel warnings at ldiskfs_flush_unwritten_io+0x74

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.7.0
• Environment: el6.6 kernels
• Severity: 3
• Assignee: Bob Glossman (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

new warnings occasionally seen in ldiskfs due to checking code new in upstream ext4 code for el6.6.

stack traces look like ldiskfs_truncate() ..... -> ldiskfs_flush_unwritten_io()

lustre calls some ext4/ldiskfs entry points without locking i_mutex. It must do so in order to avoid deadlocks. This triggers a WARN_ON_ONCE() check that is in el6.6 and newer kernels. ldiskfs patch series for future kernels took care of this, but the patch series for el6.6 did not. Need to add a patch to remove the check for ldiskfs on el6.6

Comments

[Jodi Levi (Inactive)]

Patch landed to Master.

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/13604/
Subject: LU-6199 ldiskfs: delete bad WARN_ON_ONCE from ldiskfs
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 6c55653ed07c4e4c98efdad7693a9543a41d591b

[Gerrit Updater]

Bob Glossman ([e-mail]) uploaded a new patch: http://review.whamcloud.com/13604
Subject: LU-6199 ldiskfs: delete bad WARN_ON_ONCE from ldiskfs
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 4dd2041c74c58e83910964607d13ca18560a1bb1