[SRU][Artful][Bionic][PATCH 0/1] kvm: vmx: Reinstate support for CPUs without virtual NMI

Kleber Souza kleber.souza at canonical.com
Mon Feb 5 09:39:27 UTC 2018


On 01/22/18 10:00, Fabian Gr├╝nbichler wrote:
> On Fri, Jan 19, 2018 at 10:04:35AM -0500, Joseph Salisbury wrote:
>> BugLink: http://bugs.launchpad.net/bugs/1741655
> 
> and https://bugs.launchpad.net/bugs/1738982
> 
> which I already sent a month ago in 
> <20171219093020.kplydhosqdayx3a5 at nora.maurer-it.com>

Hi Fabian,

We have NACK'ed your patch in
<20171219093020.kplydhosqdayx3a5 at nora.maurer-it.com> because the patch
from this thread has been applied first. There's no need to keep a
reference to both LP bugs if they are against the same issue. I'll go
ahead and mark 1738982 as duplicate of 1741655, please let me know if
you disagree.


Thanks,
Kleber

> 
>> 
>> == SRU Justification == The following mainline commit introduced a
>> regression in v4.12-rc1: 2c82878b0cb3 ("KVM: VMX: require virtual
>> NMI support")
>> 
>> This regression caused the kvm-intel module fail to load with the
>> following error: "modprobe: ERROR: could not insert 'kvm_intel':
>> Input/output error"
>> 
>> This error would happen because support for CPUs without virtual
>> NMI was removed by commit 2c82878b0cb3.
>> 
>> Mainline commit 8a1b43922d0d fixes this regression and was added to
>> mainline in v4.15-rc1.
>> 
>> 
>> == Fix == commit 8a1b43922d0d1279e7936ba85c4c2a870403c95f Author:
>> Paolo Bonzini <pbonzini at redhat.com> Date:   Mon Nov 6 13:31:12 2017
>> +0100
>> 
>> kvm: vmx: Reinstate support for CPUs without virtual NMI
>> 
>> == Regression Potential == Low.  This patch fixes a current
>> regression.  It was cc'd to upstream stable so had additional
>> upstream review.
>> 
>> == Test Case == A test kernel was built with this patch and tested
>> by the original bug reporter. The bug reporter states the test
>> kernel resolved the bug.
>> 
>> Paolo Bonzini (1): kvm: vmx: Reinstate support for CPUs without
>> virtual NMI
>> 
>> arch/x86/kvm/vmx.c | 150
>> +++++++++++++++++++++++++++++++++++++---------------- 1 file
>> changed, 106 insertions(+), 44 deletions(-)
>> 
>> -- 2.7.4
>> 
>> 
>> -- kernel-team mailing list kernel-team at lists.ubuntu.com 
>> https://lists.ubuntu.com/mailman/listinfo/kernel-team
> 
> 




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