Re: [patch added to the 3.12 stable tree] epoll: optimize EPOLL_CTL_DEL using rcu

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On 03/12/2014 09:40 PM, Eric Wong wrote:
> Jiri Slaby <jslaby@xxxxxxx> wrote:
>> This patch has been added to the 3.12 stable tree. If you have any
>> objections, please let us know.
> 
> Not really an objection, but performance improvements go to stable?

Yup, please see Documentation/stable_kernel_rules.txt:
- Serious issues as reported by a user of a distribution kernel may also
  be considered if they fix a notable performance or interactivity issue.
  As these fixes are not as obvious and have a higher risk of a subtle
  regression they should only be submitted by a distribution kernel
  maintainer and include an addendum linking to a bugzilla entry if it
  exists and additional information on the user-visible impact.

A bugzilla entry exists in suse, but is not visible outside suse
(bnc#849463), so I didn't link it. The user-visible impact is clearly
visible from the commit logs.

thanks,
-- 
js
suse labs
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