linux-kernel - Re: [PATCH 0/4 V10] Avoid soft lockup message when KVM is stopped by host

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Message-ID: <20120127204554.GA5784@mgebm.net>
Date:	Fri, 27 Jan 2012 15:45:54 -0500
From:	Eric B Munson <emunson@...bm.net>
To:	avi@...hat.com
Cc:	Eric B Munson <emunson@...bm.net>, mingo@...hat.com, hpa@...or.com,
	ryanh@...ux.vnet.ibm.com, aliguori@...ibm.com, mtosatti@...hat.com,
	jeremy.fitzhardinge@...rix.com, kvm@...r.kernel.org,
	linux-arch@...r.kernel.org, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4 V10] Avoid soft lockup message when KVM is stopped by
 host

On Tue, 17 Jan 2012, Eric B Munson wrote:

> Changes from V9:
> Use kvm_for_each_vcpu to iterate online vcpu's
> 
> Changes from V8:
> Make KVM_GUEST_PAUSED a per vm ioctl instead of per vcpu
> 
> Changes from V7:
> Define KVM_CAP_GUEST_PAUSED and support check
> Call mark_page_dirty () after setting PVCLOCK_GUEST_STOPPED
> 
> Changes from V6:
> Use __this_cpu_and when clearing the PVCLOCK_GUEST_STOPPED flag
> 
> Changes from V5:
> Collapse generic check_and_clear_guest_stopped into patch 2
> Include check_and_clear_guest_stopped defintion to ia64, s390, and powerpc
> Change check_and_clear_guest_stopped to use __get_cpu_var instead of taking the
>  cpuid arg.
> Protect check_and_clear_guest_stopped declaration with CONFIG_KVM_CLOCK check
> 
> Changes from V4:
> Rename KVM_GUEST_PAUSED to KVMCLOCK_GUEST_PAUSED
> Add description of KVMCLOCK_GUEST_PAUSED ioctl to api.txt
> 
> Changes from V3:
> Include CC's on patch 3
> Drop clear flag ioctl and have the watchdog clear the flag when it is reset
> 
> Changes from V2:
> A new kvm functions defined in kvm_para.h, the only change to pvclock is the
> initial flag definition
> 
> Changes from V1:
> (Thanks Marcelo)
> Host code has all been moved to arch/x86/kvm/x86.c
> KVM_PAUSE_GUEST was renamed to KVM_GUEST_PAUSED
> 
> Eric B Munson (4):
>   Add flag to indicate that a vm was stopped by the host
>   Add functions to check if the host has stopped the vm
>   Add ioctl for KVMCLOCK_GUEST_STOPPED
>   Add check for suspended vm in softlockup detector
> 
>  Documentation/virtual/kvm/api.txt   |   13 +++++++++++++
>  arch/ia64/include/asm/kvm_para.h    |    5 +++++
>  arch/powerpc/include/asm/kvm_para.h |    5 +++++
>  arch/s390/include/asm/kvm_para.h    |    5 +++++
>  arch/x86/include/asm/kvm_para.h     |    8 ++++++++
>  arch/x86/include/asm/pvclock-abi.h  |    1 +
>  arch/x86/kernel/kvmclock.c          |   21 +++++++++++++++++++++
>  arch/x86/kvm/x86.c                  |   25 +++++++++++++++++++++++++
>  include/asm-generic/kvm_para.h      |   14 ++++++++++++++
>  include/linux/kvm.h                 |    3 +++
>  kernel/watchdog.c                   |   12 ++++++++++++
>  11 files changed, 112 insertions(+), 0 deletions(-)
>  create mode 100644 include/asm-generic/kvm_para.h
> 

Just poking to make sure this set hasn't fallen through the cracks.

Eric

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