User reports a hang on 18.04 LTS(4.15.18) under a heavy I/O load
Bug #1805693 reported by
Jay Vosburgh
This bug report is a duplicate of:
Bug #1810998: CPU hard lockup with rigorous writes to NVMe drive.
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This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux (Ubuntu) |
Triaged
|
High
|
Unassigned | ||
| Bionic |
Triaged
|
High
|
Unassigned | ||
Bug Description
User reports a hang under heavy I/O:
The IO hang problem on our cloud is caused by IO hang in block-wbt wbt_wait.
The fix commit id is 2887e41b910bb14
We can recreate the problem easily by running concurrent IO from multiple VMs with sequential write. We can provide fio workload as needed for recreate.
Revision history for this message
| Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote Missing required logs. | #1 |
| Changed in linux (Ubuntu): | |
| status: | New → Incomplete |
| tags: | added: bionic |
| Changed in linux (Ubuntu): | |
| importance: | Undecided → High |
| status: | Incomplete → Triaged |
| Changed in linux (Ubuntu Bionic): | |
| status: | New → Triaged |
| importance: | Undecided → High |
| tags: | added: kernel-da-key |
| tags: | added: cscc |
Revision history for this message
| Frank Heimes (fheimes) wrote | #2 |
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This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1805693
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.