linux-kernel - Re: [PATCH 5.2 000/413] 5.2.3-stable review

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Message-ID: <20190725160939.GC18612@linux.intel.com>
Date:   Thu, 25 Jul 2019 09:09:39 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        wanpengli@...cent.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        patches@...nelci.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        linux- stable <stable@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>, jmattson@...gle.com
Subject: Re: [PATCH 5.2 000/413] 5.2.3-stable review

On Thu, Jul 25, 2019 at 07:35:13PM +0530, Naresh Kamboju wrote:
> Paolo,
> 
> On Thu, 25 Jul 2019 at 19:17, Paolo Bonzini <pbonzini@...hat.com> wrote:
> >
> > On 25/07/19 13:34, Greg Kroah-Hartman wrote:
> > > Any chance you can run 'git bisect' to find the offending patch?  Or
> > > just try reverting a few, you can ignore the ppc ones, so that only
> > > leaves you 7 different commits.
> > >
> > > Does this same test pass in 5.3-rc1?
> 
> Yes. same test pass on 5.3-rc1
> kvm unit test always fetching master branch and at tip
> runs the latest test code on all branches
> mainline 5.3-rc1 and stable-rc-5.2 branch
> 
> >
> > Anders, are you running the same kvm-unit-tests commit that passed for
> > 5.2.2?  My suspicion is that your previous test didn't have this commit
> 
> No.
> I see two extra test code commits for 5.2.3
> Re-tested 5.2.2 with tip of kvm unit tests sources and vmx test FAILED [1].
> 
> Greg,
> This investigation confirms it is a new test code failure on stable-rc 5.2.3

No, it only confirms that kvm-unit-tests/master fails on 5.2.*.  To confirm
a new failure in 5.2.3 you would need to show a test that passes on 5.2.2
and fails on 5.2.3.

As Paolo suspected, kvm-unit-tests/master fails on 5.2.* and passes if
commit 95d6d2c ("nVMX: Test Host Segment Registers and Descriptor Tables on
vmentry of nested guests") is reverted (from kvm-unit-tests).

The failures are quite clearly in the new test(s).

  PASS: HOST_SEL_CS 8: vmlaunch succeeds
  FAIL: HOST_SEL_CS 9: vmlaunch fails
  FAIL: HOST_SEL_CS c: vmlaunch fails
  PASS: HOST_SEL_SS 10: vmlaunch succeeds
  FAIL: HOST_SEL_SS 11: vmlaunch fails
  FAIL: HOST_SEL_SS 14: vmlaunch fails
  PASS: HOST_SEL_DS 10: vmlaunch succeeds
  FAIL: HOST_SEL_DS 11: vmlaunch fails
  FAIL: HOST_SEL_DS 14: vmlaunch fails
  PASS: HOST_SEL_ES 10: vmlaunch succeeds
  FAIL: HOST_SEL_ES 11: vmlaunch fails
  FAIL: HOST_SEL_ES 14: vmlaunch fails
  PASS: HOST_SEL_FS 10: vmlaunch succeeds
  FAIL: HOST_SEL_FS 11: vmlaunch fails
  FAIL: HOST_SEL_FS 14: vmlaunch fails
  PASS: HOST_SEL_GS 10: vmlaunch succeeds
  FAIL: HOST_SEL_GS 11: vmlaunch fails
  FAIL: HOST_SEL_GS 14: vmlaunch fails
  PASS: HOST_SEL_TR 80: vmlaunch succeeds
  FAIL: HOST_SEL_TR 81: vmlaunch fails
  KVM: entry failed, hardware error 0x80000021