From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Avi Kivity <avi@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Marcelo Tosatti <mtosatti@redhat.com>,
Ingo Molnar <mingo@redhat.com>, Rik van Riel <riel@redhat.com>,
S390 <linux-s390@vger.kernel.org>,
Carsten Otte <cotte@de.ibm.com>, KVM <kvm@vger.kernel.org>,
chegu vinod <chegu_vinod@hp.com>,
"Andrew M. Theurer" <habanero@linux.vnet.ibm.com>,
LKML <linux-kernel@vger.kernel.org>, X86 <x86@kernel.org>,
Gleb Natapov <gleb@redhat.com>,
linux390@de.ibm.com,
Srivatsa Vaddagiri <srivatsa.vaddagiri@gmail.com>,
Joerg Roedel <joerg.roedel@amd.com>,
Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Subject: Re: [PATCH RFC 0/2] kvm: Improving directed yield in PLE handler
Date: Wed, 11 Jul 2012 18:34:34 +0530 [thread overview]
Message-ID: <4FFD79E2.3080307@linux.vnet.ibm.com> (raw)
In-Reply-To: <4FFD68AA.1000607@linux.vnet.ibm.com>
On 07/11/2012 05:21 PM, Raghavendra K T wrote:
> On 07/11/2012 03:47 PM, Christian Borntraeger wrote:
>> On 11/07/12 11:06, Avi Kivity wrote:
[...]
>>>> So there is no win here, but there are other cases were diag44 is
>>>> used, e.g. cpu_relax.
>>>> I have to double check with others, if these cases are critical, but
>>>> for now, it seems
>>>> that your dummy implementation for s390 is just fine. After all it
>>>> is a no-op until
>>>> we implement something.
>>>
>>> Does the data structure make sense for you? If so we can move it to
>>> common code (and manage it in kvm_vcpu_on_spin()). We can guard it with
>>> CONFIG_KVM_HAVE_CPU_RELAX_INTERCEPT or something, so other archs don't
>>> have to pay anything.
>>
>> Ignoring the name, yes the data structure itself seems based on the
>> algorithm
>> and not on arch specific things. That should work.
>
> Ok. can you please elaborate, on the flow.
>
Ok got it.. Will check how the code can be common to both x86 and s390.
next prev parent reply other threads:[~2012-07-11 13:04 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-09 6:20 [PATCH RFC 0/2] kvm: Improving directed yield in PLE handler Raghavendra K T
2012-07-09 6:20 ` [PATCH RFC 1/2] kvm vcpu: Note down pause loop exit Raghavendra K T
2012-07-09 6:33 ` Raghavendra K T
2012-07-09 6:33 ` Raghavendra K T
2012-07-09 22:39 ` Rik van Riel
2012-07-10 11:22 ` Raghavendra K T
2012-07-11 8:53 ` Avi Kivity
2012-07-11 10:52 ` Raghavendra K T
2012-07-11 11:18 ` Avi Kivity
2012-07-11 11:56 ` Raghavendra K T
2012-07-11 12:41 ` Andrew Jones
2012-07-12 10:58 ` Nikunj A Dadhania
2012-07-12 11:02 ` Raghavendra K T
2012-07-09 6:20 ` [PATCH RFC 2/2] kvm PLE handler: Choose better candidate for directed yield Raghavendra K T
2012-07-09 22:30 ` Rik van Riel
2012-07-10 11:46 ` Raghavendra K T
2012-07-09 7:55 ` [PATCH RFC 0/2] kvm: Improving directed yield in PLE handler Christian Borntraeger
2012-07-10 8:27 ` Raghavendra K T
2012-07-11 9:06 ` Avi Kivity
2012-07-11 10:17 ` Christian Borntraeger
2012-07-11 11:04 ` Avi Kivity
2012-07-11 11:16 ` Alexander Graf
2012-07-11 11:23 ` Avi Kivity
2012-07-11 11:52 ` Alexander Graf
2012-07-11 12:48 ` Avi Kivity
2012-07-12 2:19 ` Benjamin Herrenschmidt
2012-07-11 11:18 ` Christian Borntraeger
2012-07-11 11:39 ` Avi Kivity
2012-07-12 5:11 ` Raghavendra K T
2012-07-12 8:11 ` Avi Kivity
2012-07-12 8:32 ` Raghavendra K T
2012-07-12 2:17 ` Benjamin Herrenschmidt
2012-07-12 8:12 ` Avi Kivity
2012-07-12 11:24 ` Benjamin Herrenschmidt
2012-07-12 10:38 ` Nikunj A Dadhania
2012-07-11 11:51 ` Raghavendra K T
2012-07-11 11:55 ` Christian Borntraeger
2012-07-11 12:04 ` Raghavendra K T
2012-07-11 13:04 ` Raghavendra K T [this message]
2012-07-09 21:47 ` Andrew Theurer
2012-07-09 21:47 ` Andrew Theurer
2012-07-10 9:26 ` Raghavendra K T
2012-07-10 10:07 ` [PATCH RFC 0/2] kvm: Improving directed yield in PLE handler : detailed result Raghavendra K T
2012-07-10 11:54 ` [PATCH RFC 0/2] kvm: Improving directed yield in PLE handler Raghavendra K T
2012-07-10 13:27 ` Andrew Theurer
2012-07-11 9:00 ` Avi Kivity
2012-07-11 13:59 ` Raghavendra K T
2012-07-11 14:01 ` Raghavendra K T
2012-07-12 8:15 ` Avi Kivity
2012-07-12 8:25 ` Raghavendra K T
2012-07-12 12:31 ` Avi Kivity
2012-07-09 22:28 ` Rik van Riel
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