linux-kernel - Re: [RFC GIT PULL rcu/next] RCU/hotplug fix

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Date:   Tue, 15 Aug 2017 10:43:24 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     jhugo@...eaurora.org, tglx@...utronix.de, bigeasy@...utronix.de,
        anna-maria@...utronix.de, boris.ostrovsky@...cle.com,
        richard@....at, linux-kernel@...r.kernel.org
Subject: Re: [RFC GIT PULL rcu/next] RCU/hotplug fix


* Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:

> Hello, Ingo,
> 
> This pull request is for an RCU change that permits waiting for grace
> periods started by CPUs late in the process of going offline.  Lack of
> this capability is causing failures:
> 
> http://lkml.kernel.org/r/db9c91f6-1b17-6136-84f0-03c3c2581ab4@codeaurora.org
> 
> Although these failures predate v4.12, and thus are in some sense not
> regressions, it would be good for them to be fixed sooner rather than
> later, hence this RFC pull request.
> 
> This commit was posted to LKML:
> 
> 	http://lkml.kernel.org/r/1500933116-11642-2-git-send-email-paulmck@linux.vnet.ibm.com
> 
> This commit has been exposed to 0day test robot and -next testing
> and is available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo
> 
> for you to fetch changes up to a58163d8ca2c8d288ee9f95989712f98473a5ac2:
> 
>   rcu: Migrate callbacks earlier in the CPU-offline timeline (2017-07-25 13:03:43 -0700)
> 
> ----------------------------------------------------------------
> Paul E. McKenney (1):
>       rcu: Migrate callbacks earlier in the CPU-offline timeline
> 
>  include/linux/rcupdate.h |   1 +
>  kernel/cpu.c             |   1 +
>  kernel/rcu/tree.c        | 209 +++++++++++++++++++++++++----------------------
>  3 files changed, 115 insertions(+), 96 deletions(-)

Pulled, thanks Paul!

	Ingo