This bug was fixed in the package linux - 4.18.0-14.15
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linux (4.18.0-14.15) cosmic; urgency=medium
* linux: 4.18.0-14.15 -proposed tracker (LP: #1811406)
* CPU hard lockup with rigorous writes to NVMe drive (LP: #1810998)
- blk-wbt: Avoid lock contention and thundering
This bug was fixed in the package linux - 4.15.0-44.47
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linux (4.15.0-44.47) bionic; urgency=medium
* linux: 4.15.0-44.47 -proposed tracker (LP: #1811419)
* Packaging resync (LP: #1786013)
- [Packaging] update helper scripts
* CPU hard lockup with rigorous writes to
Verification done on Bionic, with the HWE kernel in Xenial
(i.e., 4.15.0-44.47~16.04.1 per the original reporter's environment)
The mpt3sas driver is running correctly -- the sosreport shows the
previous kernel had mpt3sas fault_state error messages repeatedly within
less than 10 minutes, and
Verification done on Cosmic for regression on an older adapter model,
I/O stress (iozone) finishes successfully, no errors seen in dmesg.
Waiting for verification on Bionic by the reporter.
root@dixie:~# fdisk /dev/sdb # create one partition
root@dixie:~# mkfs.ext4 /dev/sdb1
root@dixie:~# mount
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
cosmic' to 'verification-done-cosmic'. If the problem still exists,
change the tag
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag
** Changed in: linux (Ubuntu Bionic)
Status: Confirmed => Fix Committed
** Changed in: linux (Ubuntu Cosmic)
Status: Confirmed => Fix Committed
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Patch submitted to kernel-team mailing list, got 2 ACKs.
https://lists.ubuntu.com/archives/kernel-team/2019-January/097471.html
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https://bugs.launchpad.net/bugs/1810781
** Description changed:
[Impact]
* Adapter resets periodically during high-load activity.
* I/O stalls until reset/reinit is complete (latency) and I/O performance
degrades across cluster (e.g., low throughput from data spread over nodes).
* The mpt3sas driver relies in a FW
** Description changed:
[Impact]
+
+ * Adapter resets periodically during high-load activity.
+
+ * I/O stalls until reset/reinit is complete (latency) and I/O performance
+ degrades across cluster (e.g., low throughput from data spread over nodes).
* The mpt3sas driver relies in a FW
Xenial has no support for the SAS 3.5 class, so we won't backport the
patch - it's only needed in Bionic (4.15 / Xenial HWE) and Cosmic kernel
(4.18).
** Changed in: linux (Ubuntu Xenial)
Status: Confirmed => Won't Fix
** Changed in: linux (Ubuntu Xenial)
Importance: Critical => Medium
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => Critical
** Changed in: linux (Ubuntu Cosmic)
Importance: Undecided => Critical
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => Critical
** Changed in: linux (Ubuntu Xenial)
Status: New => Confirmed
**
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Disco)
Importance: Critical
Assignee: Guilherme G. Piccoli (gpiccoli)
Status:
** Attachment added: "dmesg snippet showing the error"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1810781/+attachment/5227414/+files/dmesg-error
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