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SubjectRE: [RH72 Spectre] ibpb_enabled = 1 leads to hard LOCKUP under x86_64 host machine
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well first of all don't use IBRS, use retpoline

and if Andrea says this was a known issue in their code then I think that closes the issue.




> -----Original Message-----
> From: David Woodhouse [mailto:dwmw2@infradead.org]
> Sent: Saturday, January 20, 2018 1:03 AM
> To: Hou Tao <houtao1@huawei.com>; aarcange@redhat.com; linux-
> kernel@vger.kernel.org; Van De Ven, Arjan <arjan.van.de.ven@intel.com>
> Cc: mingo@redhat.com; Thomas Gleixner <tglx@linutronix.de>;
> ak@linux.intel.com; dave.hansen@linux.intel.com; peterz@infradead.org;
> qiuxishi@huawei.com; wangkefeng.wang@huawei.com
> Subject: Re: [RH72 Spectre] ibpb_enabled = 1 leads to hard LOCKUP under
> x86_64 host machine
>
> On Sat, 2018-01-20 at 17:00 +0800, Hou Tao wrote:
> >
> > So has anyone encountered a similar problem before, and any suggestions
> > and directions for the hard LOCKUP problems ?
>
> Arjan, what is the Intel recommendation here?
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