Re: net/sunrpc: v4.14-rc4 lockdep warning

[tj@xxxxxxxxxx]

Hello,

On Tue, Oct 10, 2017 at 04:48:57PM +0000, Trond Myklebust wrote:
> Thanks for the explanation. What I'm not really understanding here
> though, is how the work item could be queued at all. We have a
> wait_on_bit_lock() in xprt_destroy() that should mean the xprt-
> >task_cleanup work item has completed running, and that it cannot be
> requeued.
> 
> Is there a possibility that the flush_queue() might be triggered
> despite the work item not being queued?

Yeah, for sure.  The lockdep annotations don't distinguish those
cases and assume the worst case.

Thanks.

-- 
tejun