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xen-devel
[Xen-devel] Re: [PATCH RFC V2 4/5] kvm guest : Added configuration suppo
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To: |
Avi Kivity <avi@xxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH RFC V2 4/5] kvm guest : Added configuration support to enable debug information for KVM Guests |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Tue, 25 Oct 2011 11:30:21 -0700 |
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Cc: |
Greg Kroah-Hartman <gregkh@xxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, Gleb Natapov <gleb@xxxxxxxxxx>, KVM <kvm@xxxxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Suzuki Poulose <suzuki@xxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Sedat Dilek <sedat.dilek@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Yinghai Lu <yinghai@xxxxxxxxxx>, Xen <xen-devel@xxxxxxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> |
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Delivery-date: |
Thu, 27 Oct 2011 04:44:07 -0700 |
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References: |
<20111023190307.16364.35381.sendpatchset@xxxxxxxxxxxxxxxxxxxx> <20111023190700.16364.7548.sendpatchset@xxxxxxxxxxxxxxxxxxxx> <4EA53AB2.9050805@xxxxxxxxxx> |
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On 10/24/2011 03:15 AM, Avi Kivity wrote:
> On 10/23/2011 09:07 PM, Raghavendra K T wrote:
>> Added configuration support to enable debug information
>> for KVM Guests in debugfs
>>
>> Signed-off-by: Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>
>> Signed-off-by: Suzuki Poulose <suzuki@xxxxxxxxxx>
>> Signed-off-by: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
>> ---
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index 1f03f82..ed34269 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -562,6 +562,15 @@ config KVM_GUEST
>> This option enables various optimizations for running under the KVM
>> hypervisor.
>>
>> +config KVM_DEBUG_FS
>> + bool "Enable debug information for KVM Guests in debugfs"
>> + depends on KVM_GUEST
>> + default n
>> + ---help---
>> + This option enables collection of various statistics for KVM guest.
>> + Statistics are displayed in debugfs filesystem. Enabling this option
>> + may incur significant overhead.
>> +
>> source "arch/x86/lguest/Kconfig"
>>
>>
> This might be better implemented through tracepoints, which an be
> enabled dynamically.
Tracepoints use spinlocks, so that could get awkward.
J
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