[RARING][SRU][PATCH 0/2] Fix for LP#1226726

[Chris J Arges]

This is an SRU for Raring. The Quantal SRU was posted later.
--chris j arges

On 10/03/2013 03:57 PM, Chris J Arges wrote:
> BugLink: http://bugs.launchpad.net/bugs/1226726
> 
> SRU Justification:
> 
> Impact: When creating thousands of network namespaces the delay in executing
> commands increases exponentially in kernels before 84d17192.
> 
> Fix: In 84d17192 in the upstream kernel, locking code in fs/namespace.c
> is greatly improved resulting in much better performance when the number
> namespaces increase.
> 
> Testcase: Below, test_ns.sh can be run and a graph can be compared between
> the existing version and the patched version.
> 
> Additional Information: Because this is a change in the vfs layer, I ran the
> xfstests and compared before and after results of this patch. The patch did
> not create any additional failures in the generic xfstests.
> 
> The quantal and raring solutions differ but are both based on the 84d17192
> patch. The quantal solution does a backport of this patch instead of clean
> cherry-picks because of the amount of deps required to just use cherry-picks.
> The raring solution was able to be done with two clean cherry-picks and that's
> why that solution was chosen.
> 
>