Re: INFO: task rcu_kthread:6 blocked for more than 120 seconds.

[Russell King]

On Wed, Jan 12, 2011 at 02:22:19PM -0800, Paul E. McKenney wrote:
> Does the following patch help?

Yes it does, thanks.

Tested-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>

> commit 70ce43253a4465211a9c51e33d56a417c759a718
> Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
> Date:   Wed Jan 12 14:18:11 2011 -0800
> 
>     rcu: avoid pointless blocked-task warnings
>     
>     If the RCU callback-processing kthread has nothing to do, it parks in
>     a wait_event().  If RCU remains idle for more than two minutes, the
>     kernel complains about this.  This commit changes from wait_event()
>     to wait_event_interruptible() to prevent the kernel from complaining
>     just because RCU is idle.
>     
>     Reported-by: Russell King <rmk@xxxxxxxxxxxxxxxx>

Please add '+kernel' in there, thanks.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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