Details
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Bug
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Resolution: Fixed
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Major
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Lustre 2.12.2
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3
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9223372036854775807
Description
We discovered that on our systems with lustre mounted, the kworker is using signifficant amount of CPU.
perf top shows on an idle system:
39.44% [kernel] [k] osc_should_shrink_grant 12.14% [kernel] [k] osc_grant_work_handler 2.81% [kernel] [k] process_one_work 2.64% [kernel] [k] __queue_work 2.56% [kernel] [k] read_tsc
We currently have grant_shrink=0 on this system.
Looks like doing just du -hs /fs makes the problem go away for some time.
Also unmounting the filesystem makes the problem go away.
This is Centos 7.6 system with Lustre 2.12.0
Attachments
Issue Links
- is related to
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LU-8708 Grant shrinking disabled all the time
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- Resolved
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Activity
| Link | New: This issue is related to JFC-20 [ JFC-20 ] |
| Link | Original: This issue is related to JFC-20 [ JFC-20 ] |
| Link | New: This issue is related to JFC-20 [ JFC-20 ] |
| Fix Version/s | New: Lustre 2.12.5 [ 14696 ] |
| Resolution | New: Fixed [ 1 ] | |
| Status | Original: Open [ 1 ] | New: Resolved [ 5 ] |
| Labels | New: LTS12 |
| Fix Version/s | New: Lustre 2.14.0 [ 14490 ] |
| Link | New: This issue is duplicated by DDN-1032 [ DDN-1032 ] |
| Assignee | Original: WC Triage [ wc-triage ] | New: Alexander Zarochentsev [ zam ] |