[LU-5521] grant errors during soak testing with message drop

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.7.0
• Fix Version/s: Lustre 2.7.0
• Type: Bug
• Priority: Minor
• Reporter: Johann Lombardi (Inactive)
• Assignee: Johann Lombardi (Inactive)
• Resolution: Fixed
• Severity: 3

Description

We regularly notice the following error in the client logs during soak testing with message drop on routers:

LustreError: 7110:0:(osc_cache.c:1565:osc_enter_cache()) soaked-OST0001-osc-ffff88083651dc00: grant { dirty: 8192/8192 dirty_pages: 8192/4096729 dropped: 0 avail: 12132352, reserved: 0, flight: 9 }lru {in list: 1365510, left: 8194, waiters: 0 }try to reserve 4096.

Comments

[Johann Lombardi (Inactive)]

http://review.whamcloud.com/#/c/11716/

[Oleg Drokin]

It seems that due to an omission, patch 11716 introduced a warning and I now get a ton of this in my kernel logs:
"format at osc_cache.c:1473:osc_enter_cache_try doesn't end in new line"
also
"format at osc_cache.c:1524:osc_enter_cache doesn't end in newline"

Hopefully somebody can make a patch soon.

[Johann Lombardi (Inactive)]

hm, the patch looks sane to me ... strange

[Oleg Drokin]

I reverted this patch due to all this message spam that was also affecting Cliff.
Also LU-5656 seems to be caused by this patch too, ever since I reverted it the problem seems to be gone (still testing for some more time to be 100% sure, but by this
time it was already hitting in previous testing).

[Johann Lombardi (Inactive)]

I have pushed a new version which should address the warning: http://review.whamcloud.com/12146
As for the umount issue, i have no clue for now on how this patch could trigger this ...

[Johann Lombardi (Inactive)]

The new version should fix the umount problem. Should be tested on the soak cluster shortly.

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/12146/
Subject: LU-5521 grant: quiet message on grant waiting timeout
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: c2a0ab016383be46a8d04c00ff163eb6a4550f58

[Peter Jones]

Landed for 2.7