cpu hot-remove fails with nvme device
Bug #1498778 reported by
AceLan Kao
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
AceLan Kao | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
AceLan Kao | ||
Vivid |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
Using cpu hotplug to disable (offline) a cpu:
echo 0 > /sys/devices/
does not return.
Machine is usable, and cpu10 is marked as offline, but any test
scripts hangs because the "echo 0" never returned.
Doing bisect pointed to this commit id: a4aea5623d "NVMe: Convert to blk-mq"
Indeed, the test machine in question has an NVMe card.
Doing "rmmod nvme" and then disabling cpus works.
Related branches
CVE References
tags: | added: patch |
Changed in hwe-next: | |
status: | New → In Progress |
assignee: | nobody → AceLan Kao (acelankao) |
Changed in linux (Ubuntu Vivid): | |
status: | New → Fix Committed |
Changed in linux (Ubuntu): | |
status: | In Progress → Fix Released |
Changed in hwe-next: | |
status: | In Progress → Fix Released |
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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- vivid' to 'verification- done-vivid' .
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed. Thank you!