On Thu, Dec 17, 2015 at 04:46:00PM +0800, Xin Long wrote:
>
> sorry for late test, but unfortunately, my case with rhashtalbe still
> return EBUSY.
> I added some debug code in rhashtable_insert_rehash(), and found:
> *future_tbl is null*
>
> fail:
> /* Do not fail the insert if someone else did a rehash. */
> if (likely(rcu_dereference_raw(tbl->future_tbl))) {
> printk("future_tbl is there\n");
> return 0;
> } else {
> printk("future_tbl is null\n");
> }
>
> any idea why ?
That's presumably because you got a genuine double rehash.
Until you post your code we can't really help you.
Cheers,
--
Email: Herbert Xu <[email protected]>
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