[LU-4520] Text file busy error -- mainline 3.12 client

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Affects Version/s: Lustre 2.4.2

Environment

- Client mainline kernel 3.12.5 with patches (mentioned in LU-4400) / lustre-utils 2.4.2
- Servers lustre 2.4.2/ZFS OSDs and 2.4.2/ldiskfs OSDs
- ko2iblnd an ksocklnd

• Severity: 3
• Assignee: WC Triage
• Reporter: Roland Fehrenbacher

Description

When executing the following simple script, the in-kernel client fails with error "Text file busy", while the out-of-kernel 2.4.2 client compiled against 2.6.32 vanilla works.

-----------
#!/bin/bash

rm -f ./test.sh
touch ./test.sh && chmod a+x ./test.sh
echo "echo foo" > ./test.sh
./test.sh
echo "echo foo" > ./test.sh
------------

The following script works in all cases:

-----------
#!/bin/bash

rm -f ./test.sh
touch ./test.sh && chmod a+x ./test.sh
echo "echo foo" > ./test.sh
bash ./test.sh
echo "echo foo" > ./test.sh
------------

Issue Links

• is related to: LU-4398 mdt_object_open_lock() may not flush conflicting handles
• is related to: LU-4429 clients leaking open handles/bad lock matching in ll_md_blocking_ast

Comments

[James A Simmons]

Fixed a long time ago

[Peter Jones]

Ah yes - thanks for clarifying!

[Roland Fehrenbacher]

Peter,

yes, it is. But we're working with the in-kernel client based on 3.12 and for that we needed to make a backport. The LU-4429 fix is also included in linux-next, so will probably be in 3.15.

Roland

[Peter Jones]

Roland

Wasn't the LU-4429 fix already in 2.5.1?

Peter

[Roland Fehrenbacher]

I should have added, that it is indeed also necessary to include LU-4429 on the client.

[Roland Fehrenbacher]

Hi John,

your patch (LU-4398, http://review.whamcloud.com/#/c/9063/) applied to 2.5.1 indeed fixes the issue. The problem still exists in 2.5.1 without the patch. Great job.

Roland