Re: random insta-reboots on AMD Phenom II

[Andy Lutomirski]

> On Sep 30, 2017, at 4:53 AM, Borislav Petkov <bp@xxxxxxxxx> wrote:
> 
>> On Sat, Sep 30, 2017 at 01:29:03PM +0200, Adam Borowski wrote:
>>> On Sat, Sep 30, 2017 at 01:11:37PM +0200, Borislav Petkov wrote:
>>>> On Sat, Sep 30, 2017 at 04:05:16AM +0200, Adam Borowski wrote:
>>>> Any hints how to debug this?
>>> 
>>> Do
>>> rdmsr -a 0xc0010015
>>> as root and paste it here.
>> 
>> 1000010
>> 1000010
>> 1000010
>> 1000010
>> 1000010
>> 1000010
>> 
>> on both 4.13.4 and 4.14-rc2+.
> 
> Boot into -rc2+ and do as root:
> 
> # wrmsr -a 0xc0010015 0x1000018
> 
> If the issue gets fixed then Mr. Luto better revert the new lazy TLB
> flushing fun'n'games for 4.14 before it is too late and that kernel
> releases b0rked.

Yeah, working on it.  It's not a straightforward revert.

> 
> Thx.
> 
> -- 
> Regards/Gruss,
>    Boris.
> 
> Good mailing practices for 400: avoid top-posting and trim the reply.