APPLIED[Artful]: [SRU][Artful][Bionic][PATCH 0/1] KVM: PPC: Book3S HV: Fix guest time accounting with VIRT_CPU_ACCOUNTING_GEN

Kleber Souza kleber.souza at canonical.com
Tue Apr 3 09:45:25 UTC 2018


On 03/23/18 21:03, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1755979
> 
> == SRU Justification ==
> All KVM guest cpu utilization is being reported as sys% time in the host.
> It turns out Guest time accounting (CONFIG_VIRT_CPU_ACCOUNTING_GEN) has 
> been broken since v4.13 by commit 8b24e69fc47e436.
> 
> Commit 61bd0f66ff92 fixes this bug and is included in mainline as of v4.16-rc5.
> The commit was cc'd to upstream stable, but has not yet landed in upstream 4.15.
> 
> == Fix ==
> 61bd0f66ff92 ("KVM: PPC: Book3S HV: Fix guest time accounting with VIRT_CPU_ACCOUNTING_GEN")
> 
> == Regression Potential ==
> Low.  Also cc'd to stable, so it has had additionl upstream review.  Limited to powerpc.
> 
> == 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.
> 
> Laurent Vivier (1):
>   KVM: PPC: Book3S HV: Fix guest time accounting with
>     VIRT_CPU_ACCOUNTING_GEN
> 
>  arch/powerpc/kvm/book3s_hv.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 

Applied to artful/master-next branch.

Thanks,
Kleber




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