Re: [PATCH 0/5] x86/kvm: Refactor KVM PV features teardown and fix restore from hibernation

[Aboubakr, Mohamed]

Hello,

Confirmed c5.18xlarge and c5a.18xlarge issue has been fixed by this patch. 

Thanks 
Mohamed Aboubakr
> On May 3, 2021, at 8:26 AM, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
> 
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> 
> 
>> On 14/04/21 14:35, Vitaly Kuznetsov wrote:
>> This series is a successor of Lenny's "[PATCH] x86/kvmclock: Stop kvmclocks
>> for hibernate restore". While reviewing his patch I realized that PV
>> features teardown we have is a bit messy: it is scattered across kvm.c
>> and kvmclock.c and not all features are being shutdown an all paths.
>> This series unifies all teardown paths in kvm.c and makes sure all
>> features are disabled when needed.
>> 
>> Vitaly Kuznetsov (5):
>>   x86/kvm: Fix pr_info() for async PF setup/teardown
>>   x86/kvm: Teardown PV features on boot CPU as well
>>   x86/kvm: Disable kvmclock on all CPUs on shutdown
>>   x86/kvm: Disable all PV features on crash
>>   x86/kvm: Unify kvm_pv_guest_cpu_reboot() with kvm_guest_cpu_offline()
>> 
>>  arch/x86/include/asm/kvm_para.h |  10 +--
>>  arch/x86/kernel/kvm.c           | 113 +++++++++++++++++++++-----------
>>  arch/x86/kernel/kvmclock.c      |  26 +-------
>>  3 files changed, 78 insertions(+), 71 deletions(-)
>> 
> 
> Queuing this patch, thanks.
> 
> If the Amazon folks want to provide their Tested-by (since they looked
> at it before and tested Lenny's first attempt at using syscore_ops),
> they're still in time!
> 
> Paolo
>