ppc64le oopses and userspace process hangs in System V semaphore code
Bug #1358569 reported by
Anton Blanchard
This bug affects 2 people
Affects | Status | Importance | Assigned to | Milestone | ||
---|---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
High
|
Andy Whitcroft | |||
Trusty |
In Progress
|
High
|
Andy Whitcroft | |||
Utopic |
Fix Released
|
High
|
Andy Whitcroft | |||
linux-lts-utopic (Ubuntu) | ||||||
Trusty |
Fix Released
|
High
|
Andy Whitcroft |
Bug Description
Canonical have been hitting issues with the System V semaphore code. Sometimes userspace processes would hang, sometimes an oops would pop.
We have been able to reproduce this. Michael Ellerman has taken a close look and two fixes have just been merged in the 3.17 merge window:
51d7d5205d33 (powerpc: Add smp_mb() to arch_spin_
78e05b1421fa (powerpc: Add smp_mb()s to arch_spin_
Could these please be merged into the Utopic and (eventually) the Trusty kernel trees?
Changed in linux (Ubuntu): | |
status: | Confirmed → Fix Committed |
Changed in linux (Ubuntu Trusty): | |
status: | Confirmed → In Progress |
tags: | added: patch |
Changed in linux (Ubuntu Trusty): | |
milestone: | none → ubuntu-14.04.2 |
Changed in linux (Ubuntu Trusty): | |
milestone: | ubuntu-14.04.2 → ubuntu-14.04.3 |
Changed in linux-lts-utopic (Ubuntu Trusty): | |
milestone: | none → ubuntu-14.04.2 |
Changed in linux-lts-utopic (Ubuntu Utopic): | |
status: | New → Invalid |
Changed in linux-lts-utopic (Ubuntu Trusty): | |
importance: | Undecided → High |
Changed in linux-lts-utopic (Ubuntu): | |
status: | New → Invalid |
Changed in linux-lts-utopic (Ubuntu Trusty): | |
status: | New → Fix Released |
assignee: | nobody → Andy Whitcroft (apw) |
tags: | added: trusty |
no longer affects: | linux-lts-utopic (Ubuntu) |
no longer affects: | linux-lts-utopic (Ubuntu Utopic) |
Changed in linux (Ubuntu Trusty): | |
milestone: | ubuntu-14.04.3 → ubuntu-14.04.4 |
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This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1358569
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.