From: Paolo Bonzini <pbonzini@redhat.com>
To: Greg KH <gregkh@linuxfoundation.org>,
Jing Zhang <jingzhangos@google.com>
Cc: KVM <kvm@vger.kernel.org>, KVMARM <kvmarm@lists.cs.columbia.edu>,
LinuxMIPS <linux-mips@vger.kernel.org>,
KVMPPC <kvm-ppc@vger.kernel.org>,
LinuxS390 <linux-s390@vger.kernel.org>,
Linuxkselftest <linux-kselftest@vger.kernel.org>,
Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Will Deacon <will@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Paul Mackerras <paulus@ozlabs.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
David Hildenbrand <david@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Jim Mattson <jmattson@google.com>,
Peter Shier <pshier@google.com>, Oliver Upton <oupton@google.com>,
David Rientjes <rientjes@google.com>,
Emanuele Giuseppe Esposito <eesposit@redhat.com>,
David Matlack <dmatlack@google.com>,
Ricardo Koller <ricarkol@google.com>,
Krish Sadhukhan <krish.sadhukhan@oracle.com>,
Fuad Tabba <tabba@google.com>
Subject: Re: [PATCH v10 3/5] KVM: stats: Add documentation for binary statistics interface
Date: Thu, 17 Jun 2021 13:19:50 +0200 [thread overview]
Message-ID: <be506135-5bc3-31bd-1b20-063f01f41df1@redhat.com> (raw)
In-Reply-To: <YMrmqOxDWJ2/8sfD@kroah.com>
On 17/06/21 08:07, Greg KH wrote:
>> The statistics data itself could be read out by userspace telemetry
>> periodically without any extra parsing or setup effort.
> Do you have a pointer to userspace code that can do such a thing that
> others can use? We do not like adding apis to the kernel without at
> least seeing the user of those apis, especially for complex things like
> this.
>
> Ideally you would include some library code in the kernel tree itself
> that everyone can use for this for their own programs. You have
> provided a test which is great, but how do we know it works for "real"
> usages?
I am pretty sure that Google is using this internally, but we are also
going to work on QEMU and Libvirt support for this.
As for the rest, thanks for the review---I'll let Jing act on it and
only add my own remarks in a couple places.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Greg KH <gregkh@linuxfoundation.org>,
Jing Zhang <jingzhangos@google.com>
Cc: KVM <kvm@vger.kernel.org>, David Hildenbrand <david@redhat.com>,
Paul Mackerras <paulus@ozlabs.org>,
Linuxkselftest <linux-kselftest@vger.kernel.org>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Will Deacon <will@kernel.org>,
KVMARM <kvmarm@lists.cs.columbia.edu>,
Emanuele Giuseppe Esposito <eesposit@redhat.com>,
LinuxS390 <linux-s390@vger.kernel.org>,
Janosch Frank <frankja@linux.ibm.com>,
Marc Zyngier <maz@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
David Rientjes <rientjes@google.com>,
KVMPPC <kvm-ppc@vger.kernel.org>,
Krish Sadhukhan <krish.sadhukhan@oracle.com>,
David Matlack <dmatlack@google.com>,
Jim Mattson <jmattson@google.com>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Sean Christopherson <seanjc@google.com>,
Cornelia Huck <cohuck@redhat.com>,
Peter Shier <pshier@google.com>,
LinuxMIPS <linux-mips@vger.kernel.org>,
Vitaly Kuznetsov <vkuznets@redhat.com>
Subject: Re: [PATCH v10 3/5] KVM: stats: Add documentation for binary statistics interface
Date: Thu, 17 Jun 2021 13:19:50 +0200 [thread overview]
Message-ID: <be506135-5bc3-31bd-1b20-063f01f41df1@redhat.com> (raw)
In-Reply-To: <YMrmqOxDWJ2/8sfD@kroah.com>
On 17/06/21 08:07, Greg KH wrote:
>> The statistics data itself could be read out by userspace telemetry
>> periodically without any extra parsing or setup effort.
> Do you have a pointer to userspace code that can do such a thing that
> others can use? We do not like adding apis to the kernel without at
> least seeing the user of those apis, especially for complex things like
> this.
>
> Ideally you would include some library code in the kernel tree itself
> that everyone can use for this for their own programs. You have
> provided a test which is great, but how do we know it works for "real"
> usages?
I am pretty sure that Google is using this internally, but we are also
going to work on QEMU and Libvirt support for this.
As for the rest, thanks for the review---I'll let Jing act on it and
only add my own remarks in a couple places.
Paolo
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Greg KH <gregkh@linuxfoundation.org>,
Jing Zhang <jingzhangos@google.com>
Cc: KVM <kvm@vger.kernel.org>, KVMARM <kvmarm@lists.cs.columbia.edu>,
LinuxMIPS <linux-mips@vger.kernel.org>,
KVMPPC <kvm-ppc@vger.kernel.org>,
LinuxS390 <linux-s390@vger.kernel.org>,
Linuxkselftest <linux-kselftest@vger.kernel.org>,
Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Will Deacon <will@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Paul Mackerras <paulus@ozlabs.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
David Hildenbrand <david@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Jim Mattson <jmattson@google.com>,
Peter Shier <pshier@google.com>, Oliver Upton <oupton@google.com>,
David Rientjes <rientjes@google.com>,
Emanuele Giuseppe Esposito <eesposit@redhat.com>,
David Matlack <dmatlack@google.com>,
Ricardo Koller <ricarkol@google.com>,
Krish Sadhukhan <krish.sadhukhan@oracle.com>,
Fuad Tabba <tabba@google.com>
Subject: Re: [PATCH v10 3/5] KVM: stats: Add documentation for binary statistics interface
Date: Thu, 17 Jun 2021 11:19:50 +0000 [thread overview]
Message-ID: <be506135-5bc3-31bd-1b20-063f01f41df1@redhat.com> (raw)
In-Reply-To: <YMrmqOxDWJ2/8sfD@kroah.com>
On 17/06/21 08:07, Greg KH wrote:
>> The statistics data itself could be read out by userspace telemetry
>> periodically without any extra parsing or setup effort.
> Do you have a pointer to userspace code that can do such a thing that
> others can use? We do not like adding apis to the kernel without at
> least seeing the user of those apis, especially for complex things like
> this.
>
> Ideally you would include some library code in the kernel tree itself
> that everyone can use for this for their own programs. You have
> provided a test which is great, but how do we know it works for "real"
> usages?
I am pretty sure that Google is using this internally, but we are also
going to work on QEMU and Libvirt support for this.
As for the rest, thanks for the review---I'll let Jing act on it and
only add my own remarks in a couple places.
Paolo
next prev parent reply other threads:[~2021-06-17 11:23 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-17 4:41 [PATCH v10 0/5] KVM statistics data fd-based binary interface Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 4:41 ` [PATCH v10 1/5] KVM: stats: Separate generic stats from architecture specific ones Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 4:41 ` [PATCH v10 2/5] KVM: stats: Add fd-based API to read binary stats data Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 7:03 ` Greg KH
2021-06-17 7:03 ` Greg KH
2021-06-17 7:03 ` Greg KH
2021-06-17 11:23 ` Paolo Bonzini
2021-06-17 11:23 ` Paolo Bonzini
2021-06-17 11:23 ` Paolo Bonzini
2021-06-17 14:48 ` Jing Zhang
2021-06-17 14:48 ` Jing Zhang
2021-06-17 14:48 ` Jing Zhang
2021-06-17 7:24 ` Greg KH
2021-06-17 7:24 ` Greg KH
2021-06-17 7:24 ` Greg KH
2021-06-17 11:27 ` Paolo Bonzini
2021-06-17 11:27 ` Paolo Bonzini
2021-06-17 11:27 ` Paolo Bonzini
2021-06-17 14:56 ` Jing Zhang
2021-06-17 14:56 ` Jing Zhang
2021-06-17 14:56 ` Jing Zhang
2021-06-17 15:29 ` Paolo Bonzini
2021-06-17 15:29 ` Paolo Bonzini
2021-06-17 15:29 ` Paolo Bonzini
2021-06-17 15:42 ` Jing Zhang
2021-06-17 15:42 ` Jing Zhang
2021-06-17 15:42 ` Jing Zhang
2021-06-17 4:41 ` [PATCH v10 3/5] KVM: stats: Add documentation for binary statistics interface Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 5:52 ` Greg KH
2021-06-17 5:52 ` Greg KH
2021-06-17 5:52 ` Greg KH
2021-06-17 15:09 ` Jing Zhang
2021-06-17 15:09 ` Jing Zhang
2021-06-17 15:09 ` Jing Zhang
2021-06-17 5:56 ` Greg KH
2021-06-17 5:56 ` Greg KH
2021-06-17 5:56 ` Greg KH
2021-06-17 11:29 ` Paolo Bonzini
2021-06-17 11:29 ` Paolo Bonzini
2021-06-17 11:29 ` Paolo Bonzini
2021-06-17 11:42 ` Greg KH
2021-06-17 11:42 ` Greg KH
2021-06-17 11:42 ` Greg KH
2021-06-17 11:46 ` Paolo Bonzini
2021-06-17 11:46 ` Paolo Bonzini
2021-06-17 11:46 ` Paolo Bonzini
2021-06-17 15:45 ` Jing Zhang
2021-06-17 15:45 ` Jing Zhang
2021-06-17 15:45 ` Jing Zhang
2021-06-17 15:20 ` Jing Zhang
2021-06-17 15:20 ` Jing Zhang
2021-06-17 15:20 ` Jing Zhang
2021-06-17 22:15 ` Jing Zhang
2021-06-17 22:15 ` Jing Zhang
2021-06-17 22:15 ` Jing Zhang
2021-06-17 6:05 ` Greg KH
2021-06-17 6:05 ` Greg KH
2021-06-17 6:05 ` Greg KH
2021-06-17 15:41 ` Jing Zhang
2021-06-17 15:41 ` Jing Zhang
2021-06-17 15:41 ` Jing Zhang
2021-06-17 6:07 ` Greg KH
2021-06-17 6:07 ` Greg KH
2021-06-17 6:07 ` Greg KH
2021-06-17 11:19 ` Paolo Bonzini [this message]
2021-06-17 11:19 ` Paolo Bonzini
2021-06-17 11:19 ` Paolo Bonzini
2021-06-17 11:34 ` Greg KH
2021-06-17 11:34 ` Greg KH
2021-06-17 11:34 ` Greg KH
2021-06-17 15:51 ` Jing Zhang
2021-06-17 15:51 ` Jing Zhang
2021-06-17 15:51 ` Jing Zhang
2021-06-17 4:41 ` [PATCH v10 4/5] KVM: selftests: Add selftest for KVM statistics data binary interface Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 4:41 ` [PATCH v10 5/5] KVM: stats: Remove code duplication for binary and debugfs stats Jing Zhang
2021-06-17 4:41 ` Jing Zhang
2021-06-17 4:41 ` Jing Zhang
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