From: Jinpu Wang <jinpu.wang@profitbricks.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable <stable@vger.kernel.org>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
konrad.wilk@oracle.com, Peter Zijlstra <peterz@infradead.org>,
David Woodhouse <dwmw@amazon.co.uk>
Subject: Re: [BUG]smt sysfs dir missing on 4.4.148 and 4.14.63
Date: Mon, 20 Aug 2018 16:52:41 +0200 [thread overview]
Message-ID: <CAMGffEnrFu3ve6CbqNX9cRKz_MwH-Ch_QU7zGbYiQ7Hpnv6Yrw@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.21.1808201646440.1551@nanos.tec.linutronix.de>
On Mon, Aug 20, 2018 at 4:47 PM Thomas Gleixner <tglx@linutronix.de> wrote:
>
> On Mon, 20 Aug 2018, Jinpu Wang wrote:
> > On Mon, Aug 20, 2018 at 3:02 PM Thomas Gleixner <tglx@linutronix.de> wrote:
> > > That works, but we might as well force 'select HOTPLUG_CPU if SMP' so the
> > > L1TF mitigations are functional. Sigh....
> > >
> > > Thanks,
> > >
> > > tglx
> > right, sth like?
> > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> > index b0312f8..5852948 100644
> > --- a/arch/x86/Kconfig
> > +++ b/arch/x86/Kconfig
> > @@ -188,7 +188,8 @@ config X86
> > select HAVE_SYSCALL_TRACEPOINTS
> > select HAVE_UNSTABLE_SCHED_CLOCK
> > select HAVE_USER_RETURN_NOTIFIER
> > - select HOTPLUG_SMT if SMP
> > + select HOTPLUG_CPU if SMP
> > + select HOTPLUG_SMT if SMP && HOTPLUG_CPU
>
> The && HOTPLUG is pretty pointless now.
Hmm, so this way?
+ select HOTPLUG_CPU if SMP
+ select HOTPLUG_SMT if HOTPLUG_CPU
thanks!
--
Jack Wang
Linux Kernel Developer
ProfitBricks GmbH
Greifswalder Str. 207
D - 10405 Berlin
Tel: +49 30 577 008 042
Fax: +49 30 577 008 299
Email: jinpu.wang@profitbricks.com
URL: https://www.profitbricks.de
Sitz der Gesellschaft: Berlin
Registergericht: Amtsgericht Charlottenburg, HRB 125506 B
Geschäftsführer: Achim Weiss, Matthias Steinberg, Christoph Steffens
prev parent reply other threads:[~2018-08-20 14:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAMGffEnzVo5VVSVBjCOBMhcoV1qXf0XXqJqr3C01xQn-aUiZFQ@mail.gmail.com>
[not found] ` <20180816155126.GA18296@kroah.com>
2018-08-16 16:28 ` [BUG]smt sysfs dir missing on 4.4.148 and 4.14.63 Jinpu Wang
2018-08-16 16:39 ` Greg Kroah-Hartman
[not found] ` <CAMGffEk2FqRn0av7T-aF-TKvRAKeinm96NYjJju_T4CmUrYPkQ@mail.gmail.com>
2018-08-17 12:39 ` Jinpu Wang
2018-08-17 17:01 ` Greg Kroah-Hartman
2018-08-18 12:50 ` Thomas Gleixner
2018-08-20 8:05 ` Jinpu Wang
2018-08-20 13:02 ` Thomas Gleixner
2018-08-20 13:20 ` Jinpu Wang
2018-08-20 14:47 ` Thomas Gleixner
2018-08-20 14:52 ` Jinpu Wang [this message]
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