Re: [PATCH v3] NFSv4: replace seqcount_t with a rw_semaphore

[Sebastian Andrzej Siewior]

On 2016-10-31 16:11:02 [+0000], Trond Myklebust wrote:
> 
> Yes, and yes. We can’t rely on the list pointers remaining correct, so we 
> restart the list scan and we use the ops->state_flag_bit to signal whether or 
> not state has been recovered for the entry being scanned.

but this is tested at the top of the loop and by then you look at
lists' ->next pointer which might be invalid.

Sebastian