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SubjectRe: mmotm 2010-11-23 + autogroups -> inconsistent lock state
On Thu, 2010-12-02 at 10:16 -0800, Paul E. McKenney wrote:
> On Wed, Nov 24, 2010 at 01:25:25PM -0700, Mike Galbraith wrote:
> > Despite task groups being freed via rcu, update_shares_cup() hits freed
> > memory and explodes, and nothing I've tried has been able to stop it.
> > The only thing I haven't tried (aside from the right thing;) is to take
> > rcu out of the picture entirely.
> Is your new autogroup structure retaining a pointer to memory that
> is freed by RCU?

That turned out to be a typo that left freed cfs_rq registered. No dark
elves (memory ordering), just a defenseless little typo.


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