On Sat, Sep 30, 2017 at 8:47 AM, Markus Trippelsdorf <mar...@trippelsdorf.de> wrote: > On 2017.09.30 at 13:53 +0200, Borislav Petkov 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. > > The issue does get fixed by setting TlbCacheDis to 1. I have been > running it for the last few weeks without any problems. > Performance is not affected at all. So it might by easier to just set > the bit for older AMD processors as a boot quirk. > Changing the TLB code so late might not be a good idea...
Looking at the AMD K10 revision guide (http://support.amd.com/TechDocs/41322_10h_Rev_Gd.pdf), errata #298 that this fixes should only apply to revisions DR-BA and DR-B2, which include the original Phenom, but not Phenom II. The Phenom II X6 is revision PH-E0, which does not have this errata. -- Brian Gerst
