[LU-12501] lfs df can never return

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.3
• Affects Version/s: Lustre 2.13.0
• Labels: patch
• Environment: Any lustre client
• Severity: 3
• Assignee: Andreas Dilger
• Reporter: James A Simmons

Description

In recent testing I have encounter cases were running lfs df never returns. Today I sat down to track down why it never returns. The reason is this loop never exits in showdf() in lfs.c.

for (i = 0, state = stat->os_state; state != 0; i++)

{ ... }

Comments

[James A Simmons]

Yes I tracked the issue Peter. Currently my test setup is all SSDs so I see this problem.

[Gerrit Updater]

James Simmons ([e-mail]) uploaded a new patch: https://review.whamcloud.com/35403
Subject: LU-12501 utils: stop showdf() endless loop
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: eba159fd6d2b45689072cd59dff3c77af83c00aa

[Peter Jones]

Does that mean that you are able to run git bisect to identify the commit that introduced the problem?

[James A Simmons]

The last couple of weeks  I started to see it. For some reason I see this all the time on our test bed.

[Patrick Farrell (Inactive)]

James,

When do you see this problem?  It's clearly not all the time, as we don't see it in our testing.

[Peter Jones]

James

Any idea of when this problem first appeared?

Peter