linux-kernel - Re: [GIT PULL rcu/urgent] Allow SRCU readers in irq handlers for KVM

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Date:   Fri, 9 Jun 2017 08:18:07 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     linux-kernel@...r.kernel.org, linuc.decode@...il.com,
        kvm@...r.kernel.org, pbonzini@...hat.com
Subject: Re: [GIT PULL rcu/urgent] Allow SRCU readers in irq handlers for KVM


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

> Hello, Ingo,
> 
> This series enables srcu_read_lock() and srcu_read_unlock to be used from
> interrupt handlers, which fixes a bug in KVM's use of SRCU in delivery
> of interrupts to guest OSes.  These patches have been exposed to 0day
> Test Robot and to -next testing, have been tested by the KVM folks,
> and were posted to LKML:
> 
> http://lkml.kernel.org/r/20170605220919.GA27820@linux.vnet.ibm.com
> 
> These changes, based on v4.2-rc4, are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/urgent
> 
> for you to fetch changes up to 1123a6041654e8f889014659593bad4168e542c2:
> 
>   srcu: Allow use of Classic SRCU from both process and interrupt context (2017-06-08 08:25:19 -0700)
> 
> ----------------------------------------------------------------
> Paolo Bonzini (2):
>       srcu: Allow use of Tiny/Tree SRCU from both process and interrupt context
>       srcu: Allow use of Classic SRCU from both process and interrupt context
> 
>  include/linux/srcu.h  | 2 --
>  kernel/rcu/srcu.c     | 5 ++---
>  kernel/rcu/srcutiny.c | 7 ++++---
>  kernel/rcu/srcutree.c | 5 ++---
>  4 files changed, 8 insertions(+), 11 deletions(-)

Pulled, thanks a lot Paul!

	Ingo