[LU-921] generate warnings in case of discarding dirty pages

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.4.0, Lustre 2.1.4
• Affects Version/s: Lustre 1.8.x (1.8.0 - 1.8.5)
• Environment: sles10sp3, sles11sp1, centos5.6, centos6
• Severity: 3
• Bugzilla ID: 21,812
• Assignee: Hongchao Zhang
• Reporter: Jay Lan (Inactive)

Description

"NASA/AMES is asking for the ability to be able to tell users which files may be suspect after an
adverse cluster event; panics, hangs, client evictions, etc.

One example that may be easier than others is when a client is evicted and the client is forced to
toss dirty pages of open files. The site has been experimenting with a way to list the inode
numbers on the mds with the associated pages tossed on the clients. I'll leave it to them to
discuss here.
" – from Oracle BZ 21812.

Oracle has released a patch (attachment 33114.) It affected client side. We like Whamcloud to include this patch for 1.8.x and 2.1.x.

Issue Links

• is related to: LU-2505 lfsck: BUG: soft lockup - CPU#0 stuck for 67s! [umount:22194]
• Trackbacks: Lustre 1.8.x known issues tracker While testing against Lustre b18 branch, we would hit known bugs which were already reported in Lustre Bugzilla https://bugzilla.lustre.org/. In order to move away from relying on Bugzilla, we would create a JIRA

Comments

[Peter Jones]

Landed for 2.1.4 and 2.4

[Emoly Liu]

Port for b2_1 is here http://review.whamcloud.com/#change,4716. I combine the two related patches into a single one.

[Hongchao Zhang]

the patch is tracked at http://review.whamcloud.com/#change,4443

[Hongchao Zhang]

Yes, this test is put into ALWAYS_EXCEPT in bz5494, and I tested it under master and b2_1, both passed locally,
I'll try to create a patch to remove it from A_E, and check whether it pass or not in Toro.

[Peter Jones]

Ah sorry - I did not realize that. In that case I will defer to Hongchao to comment.

[Jay Lan (Inactive)]

Peter, a new test case recovery-small 24b was created to test this issue as part of the patch. That was how I discovered that test_24[ab] were skipped.

Let me know if you want to fix that in this case, since recovery-small.sh is modified anyway, or you want me to open a new case. I am fine either way.

[Peter Jones]

Jay that is really a separate issue and should be tracked as such. Could you please open a separate ticket to track the issue about test 24? Thanks!

[Jay Lan (Inactive)]

The test result looks good!

Can you make changes to remove test "24" from ALWAYS_EXCEPT as part of the patch? Thanks!

[Jay Lan (Inactive)]

Why is recovery-small test 24 ALWAYS_EXCEPT?

I think we can remove it from the ALWAYS_EXCEPT.

[Jay Lan (Inactive)]

I provide our Lustre group the new rpms and ask for feedback.