Re: [PATCH] rv: Fix boot failure when kernel lockdown is active

[Gabriele Monaco <gmonaco@redhat.com>]

On Wed, 2025-09-17 at 16:07 +0200, Nam Cao wrote:
> Gabriele Monaco <gmonaco@redhat.com> writes:
> > On Wed, 2025-09-17 at 12:57 +0000, Xiu Jianfeng wrote:
> > > From: Xiu Jianfeng <xiujianfeng@huawei.com>
> > > 
> > > When booting kernel with lockdown=confidentiality parameter, the
> > > system will hang at rv_register_reactor() due to waiting for
> > > rv_interface_lock, as shown in the following log,
> > > 
> > 
> > Thanks for finding this, the problem was already fixed in [1],
> > which is on its way to getting merged.
> > 
> > [1] -
> > https://lore.kernel.org/all/20250903065112.1878330-1-zhen.ni@easystack.cn
> 
> Yeah, but it is interesting that this is causing real boot problem. I
> thought that commit merely fixes a theoretical bug. I guess this is
> an even stronger motivation to use lock guards.

Yeah totally, I have the feeling that with the kernel there's no such a
thing as a "theoretical bug", kinda like a good consequence of Murphy's
Law.

But I agree, that's something we may want to do sooner than later.
I'm currently not refactoring the RV core so I won't be touching that
for a while, but any patch is more than welcome!

Gabriele