[SRU][lts-vivid][PATCH 0/1] cpu: Defer smpboot kthread unparking until CPU known to scheduler

[Kamal Mostafa]

On Wed, Apr 13, 2016 at 02:58:46PM -0400, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1570054
> 
> == SRU Justification ==
> Launchpad bug was opened for an SRU request need for a private bug that
> has embargoed information.
> 
> Upstream commit 00df35f991914db6b8bde8cf09808e19a9cffc3d fixes a bug in lts-vivid
> that is causing guests on a public cloud to crash at random times.  Commit
> 00df35f99 was requested in upstream stable, but it has not come down via the 
> normal stable udpates as of yet.  This SRU request is to get the fix into lts-vivid
> while waiting for the commit to come in via stable updates.

This fix has already been applied to Vivid master-next (via
3.19-stable):

[vivid] f907f5a cpu: Defer smpboot kthread unparking until CPU known to scheduler

 -Kamal

> 
> 
> == Fix ==
> commit 00df35f991914db6b8bde8cf09808e19a9cffc3d
> Author: Paul E. McKenney <paulmck at linux.vnet.ibm.com>
> Date:   Sun Apr 12 08:06:55 2015 -0700
> 
>     cpu: Defer smpboot kthread unparking until CPU known to scheduler
> 
> 
> 
> == Test Case ==
> A test kernel was built with this patch and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.
> 
> 
> 
> 
> Paul E. McKenney (1):
>   cpu: Defer smpboot kthread unparking until CPU known to scheduler
> 
>  include/linux/cpu.h |  2 ++
>  init/main.c         |  1 +
>  kernel/cpu.c        | 34 +++++++++++++++++++++++++++++++---
>  3 files changed, 34 insertions(+), 3 deletions(-)
> 
> -- 
> 2.7.4
> 
> 
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