Re: Default enable RCU list lockdep debugging with PROVE_RCU

Qian Cai
2020-05-14T12:31:16Z

> On May 14, 2020, at 8:25 AM, Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> Hi Paul,
>
> This patch in the rcu tree
>
> d13fee049fa8 ("Default enable RCU list lockdep debugging with PROVE_RCU")
>
> is causing whack-a-mole in the syzbot testing of linux-next. Because
> they always do a debug build of linux-next, no testing is getting done. :-(
>
> Can we find another way to find all the bugs that are being discovered
> (very slowly)?

Alternatively, could syzbot to use PROVE_RCU=n temporarily because it can’t keep up with it? I personally found PROVE_RCU_LIST=y is still useful for my linux-next testing, and don’t want to lose that coverage overnight.