** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
** Changed in: linux (Ubuntu)
Status: Fix Released => Invalid
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This bug was fixed in the package linux - 4.18.0-14.15
---
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
---
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
The reporter verified the Bionic kernel successfully as well.
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https://bugs.launchpad.net/bugs/1810998
Title:
CPU hard lockup with rigorous writes to NVMe drive
Status in
Verification done on Bionic (no errors seen on dmesg).
Still waiting on verification by the reporter (different hardware), but this
verification shows no regression in dmesg.
Same steps as described in the previous comment.
** Tags removed: verification-needed-bionic
** Tags added:
Verification done on Cosmic (no errors seen on dmesg).
Waiting for verification on Bionic by the reporter.
root@shuckle:~# uname -a
Linux shuckle 4.18.0-14-generic #15-Ubuntu SMP Mon Jan 14 09:01:02 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux
root@shuckle:~# fdisk /dev/nvme0n1 # create one
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: New => Fix Committed
** Changed in: linux (Ubuntu Cosmic)
Status: New => Fix Committed
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Patch v2 series posted to the kernel-team mailing list:
[SRU B][PATCH v2 0/7] blk-wbt: fix for LP#1810998
https://lists.ubuntu.com/archives/kernel-team/2019-January/097831.html
[SRU C][PATCH v2 0/6] blk-wbt: fix for LP#1810998
** Description changed:
[Impact]
- * Users may experience cpu hard lockups when performing
- rigorous writes to NVMe drives.
+ * Users may experience cpu hard lockups when performing
+rigorous writes to NVMe drives.
- * The fix addresses an scheduling issue in the original
-
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Cosmic)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Bionic)
Importance:
Patch series posted to kernel-team mailing list:
[SRU B][PATCH 00/13] blk-wbt: fix for LP#1810998
https://lists.ubuntu.com/archives/kernel-team/2019-January/097675.html
[SRU C][PATCH 0/8] blk-wbt: fix for LP#1810998
https://lists.ubuntu.com/archives/kernel-team/2019-January/097689.html
--
You
** Description changed:
- [NOTE]
-
- * Patches will be sent to the kernel-team mailing list
- once the test kernel has been verified by the reporter.
-
[Impact]
* Users may experience cpu hard lockups when performing
rigorous writes to NVMe drives.
* The fix addresses an
** Description changed:
[NOTE]
* Patches will be sent to the kernel-team mailing list
once the test kernel has been verified by the reporter.
[Impact]
* Users may experience cpu hard lockups when performing
rigorous writes to NVMe drives.
* The fix addresses an
** Description changed:
[NOTE]
* Patches will be sent to the kernel-team mailing list
once the test kernel has been verified by the reporter.
[Impact]
* Users may experience cpu hard lockups when performing
rigorous writes to NVMe drives.
* The fix addresses an
** Description changed:
[NOTE]
- * Patches will be sent to the kernel-team mailing list
-once the test kernel has been verified by the reporter.
+ * Patches will be sent to the kernel-team mailing list
+ once the test kernel has been verified by the reporter.
[Impact]
- *
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