linux-kernel - Re: [PATCH 3.16 47/47] KVM: x86/vPMU: refine kvm

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Message-ID: <20191101080745.GT1554@sasha-vm>
Date:   Fri, 1 Nov 2019 04:07:45 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Ben Hutchings <ben@...adent.org.uk>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>,
        akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        Like Xu <like.xu@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH 3.16 47/47] KVM: x86/vPMU: refine kvm_pmu err msg when
 event creation failed

On Thu, Oct 31, 2019 at 03:53:23PM -0700, Joe Perches wrote:
>On Thu, 2019-10-31 at 22:14 +0000, Ben Hutchings wrote:
>> On Fri, 2019-10-25 at 12:05 -0700, Joe Perches wrote:
>> > On Fri, 2019-10-25 at 19:03 +0100, Ben Hutchings wrote:
>> > > 3.16.76-rc1 review patch.  If anyone has any objections, please let me know.
>> >
>> > This seems more like an enhancement than a bug fix.
>> >
>> > Is this really the type of patch that is appropriate
>> > for stable?
>>
>> Apparently so:
>>
>> v4.14.135: eba797dbf352 KVM: x86/vPMU: refine kvm_pmu err msg when event creation failed
>> v4.19.61: ba27a25df6df KVM: x86/vPMU: refine kvm_pmu err msg when event creation failed
>> v4.4.187: 505c011f9f53 KVM: x86/vPMU: refine kvm_pmu err msg when event creation failed
>> v4.9.187: 3984eae04473 KVM: x86/vPMU: refine kvm_pmu err msg when event creation failed
>> v5.1.20: edadec197fbf KVM: x86/vPMU: refine kvm_pmu err msg when event creation failed
>> v5.2.3: 9f062aef7356 KVM: x86/vPMU: refine kvm_pmu err msg when event creation failed
>
>I think not, but hey, maybe you and Greg do.
>
>Porting enhancements, even trivial ones, imo is
>not a great thing for stable branches.
>
>My perspective is that only bug fixes should be
>applied to stable branches.

Usability issues are just as bad as code bugs. Our human interface is at
least as important as the functionality of our code.

-- 
Thanks,
Sasha