Re: [locking/paravirt] static_key_disable_cpuslocked(): static key 'virt_spin_lock_key+0x0/0x20' used before call to jump_label_init()

[Fengguang Wu]

On Mon, Oct 30, 2017 at 08:47:08AM +0100, Juergen Gross wrote:
> On 30/10/17 08:35, Fengguang Wu wrote:
> > On Sun, Oct 29, 2017 at 11:51:55PM +0100, Fengguang Wu wrote:
> > > Hi Linus,
> > >
> > > Up to now we see the below boot error/warnings when testing v4.14-rc6.
> > >
> > > They hit the RC release mainly due to various imperfections in 0day's
> > > auto bisection. So I manually list them here and CC the likely easy to
> > > debug ones to the corresponding maintainers in the followup emails.
> > >
> > > boot_successes: 4700
> > > boot_failures: 247
> >
> > [...]
> >
> > > WARNING:at_kernel/jump_label.c:#static_key_disable_cpuslocked: 7
>
> This patch is in the tip tree only, it will be merged in 4.15. So I
> don't understand why you are reporting this for 4.14-rc6.

Ah sorry, I simply checked recent bisects for that warning.
Then I'll need to carry out some new bisect on 4.14-rc6.

> There is a patch by Dou Liyang pending since 28th October addressing
> that issue:
>
> [PATCH tip v2] x86/paravirt: Make the virt_spin_lock_key setup after
> jump_label_init()

Excellent!

Thanks,
Fengguang