Maybe RCU_BARRIER is waiting for all RCU callback to complete but one or
more don't exists, since the module was unloaded.
On Fri, Feb 3, 2012 at 11:48 AM, Robert Beckett
wrote:
> Hello,
>
> Does anyone reading this list know much about the rcu subsystem?
>
> I have been debugging a problem with
Hello,
Does anyone reading this list know much about the rcu subsystem?
I have been debugging a problem with unmounting disks. Occasionally when
unmounting an ext4 filesystem, the whole system would freeze.
I traced this to it waiting for completion on an rcu_barrier.
After lots of debugging,
