Re: [locktorture] 5f6a140f30: kernel BUG at drivers/base/driver.c:153!

[Oleg Nesterov <oleg@redhat.com>]

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On 09/09, Paul E. McKenney wrote:
>
> This is obsolete, but its replacement is the same patch.

fbe3b97183f84155d81e506b1aa7d2ce986f7a36 in linux-rcu.git#experimental
I guess?

> Oleg, Davidlohr, am I missing something on how percpu_rwsem or
> locktorture work?

No, I think the patch is fine. Thanks for doing this! I was going to
send something like this change too. And in fact I am still thinking
about another test which plays with rcu_sync only, but probably we
need some cleanups first (and we need them anyway). I'll try to do
this a bit later.

> +void torture_percpu_rwsem_init(void)
> +{
> +	BUG_ON(percpu_init_rwsem(&pcpu_rwsem));
> +}
> +

Aha, we don't really need this... I mean we can use the static initialiser
which can also be used by uprobes and cgroups. I'll try to send the patch
tomorrow.

Thanks!

Oleg.