From: Raghavendra K T <raghukt@linux.vnet.ibm.com>
To: Avi Kivity <avi@redhat.com>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>,
Greg Kroah-Hartman <gregkh@suse.de>,
"H. Peter Anvin" <hpa@zytor.com>, Gleb Natapov <gleb@redhat.com>,
Virtualization <virtualization@lists.linux-foundation.org>,
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>,
x86@kernel.org, KVM <kvm@vger.kernel.org>,
Dave Jiang <dave.jiang@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Xen <xen-devel@lists.xensource.com>,
Sedat Dilek <sedat.dilek@gmail.com>,
Yinghai Lu <yinghai@kernel.org>,
Marcelo Tosatti <mtosatti@redhat.com>,
Ingo Molnar <mingo@redhat.com>, Rik van Riel <riel@redhat.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
LKML <linux-kernel@vger.kernel.org>,
Suzuki Poulose <suzuki@linux.vnet.ibm.com>,
Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH RFC V2 3/5] kvm hypervisor : Add two hypercalls to support pv-ticketlock
Date: Mon, 24 Oct 2011 16:50:07 +0530 [thread overview]
Message-ID: <4EA549E7.9090601@linux.vnet.ibm.com> (raw)
In-Reply-To: <4EA53A7D.300@redhat.com>
On 10/24/2011 03:44 PM, Avi Kivity wrote:
> On 10/23/2011 09:05 PM, Raghavendra K T wrote:
>> Add two hypercalls to KVM hypervisor to support pv-ticketlocks.
>> +
>> +end_wait:
>> + finish_wait(&vcpu->wq,&wait);
>> +}
>
> This hypercall can be replaced by a HLT instruction, no?
>
> I'm pretty sure this misses a lot of stuff from kvm_vcpu_block().
Yes.. agree. HLT sounds better idea. 'll try this out.
>
>> + if (vcpu) {
>> + vcpu->kicked = 1;
>
> Need to use smp memory barriers here.
Agree.
>
>> + wake_up_interruptible(&vcpu->wq);
>> + }
>> +}
>> +
>> int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
>> {
>> unsigned long nr, a0, a1, a2, a3, ret;
>>
>
next prev parent reply other threads:[~2011-10-24 11:19 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-23 19:03 [PATCH RFC V2 0/5] kvm : Paravirt-spinlock support for KVM guests Raghavendra K T
2011-10-23 19:03 ` Raghavendra K T
2011-10-23 19:04 ` [PATCH RFC V2 1/5] debugfs: Add support to print u32 array in debugfs Raghavendra K T
2011-10-23 19:04 ` Raghavendra K T
2011-10-23 19:04 ` Raghavendra K T
2011-10-23 22:20 ` Greg KH
2011-10-24 9:30 ` Raghavendra K T
2011-10-23 19:04 ` [PATCH RFC V2 2/5] debugfs: Renaming of xen functions and change unsigned to u32 Raghavendra K T
2011-10-23 19:04 ` Raghavendra K T
2011-10-23 19:04 ` Raghavendra K T
2011-10-23 22:19 ` Greg KH
2011-10-24 9:28 ` Raghavendra K T
2011-10-24 9:38 ` Greg KH
2011-10-23 19:05 ` [PATCH RFC V2 3/5] kvm hypervisor : Add two hypercalls to support pv-ticketlock Raghavendra K T
2011-10-23 19:05 ` Raghavendra K T
2011-10-24 10:01 ` Sasha Levin
2011-10-24 11:00 ` Raghavendra K T
2011-10-24 11:00 ` Raghavendra K T
2011-10-24 11:00 ` Raghavendra K T
2011-10-24 10:01 ` Sasha Levin
2011-10-24 10:14 ` Avi Kivity
2011-10-24 11:20 ` Raghavendra K T [this message]
2011-10-24 12:27 ` Srivatsa Vaddagiri
2011-10-24 13:09 ` Avi Kivity
2011-10-24 13:50 ` Srivatsa Vaddagiri
2011-10-25 18:24 ` Raghavendra K T
2011-10-26 10:34 ` Avi Kivity
2011-10-26 19:08 ` Raghavendra K T
2011-10-26 19:08 ` Raghavendra K T
2011-10-26 19:08 ` Raghavendra K T
2011-10-27 10:17 ` Avi Kivity
2011-10-27 10:17 ` Avi Kivity
2011-10-26 20:09 ` Jeremy Fitzhardinge
2011-10-26 20:09 ` Jeremy Fitzhardinge
2011-10-26 20:09 ` Jeremy Fitzhardinge
2011-10-23 19:05 ` Raghavendra K T
2011-10-23 19:07 ` [PATCH RFC V2 4/5] kvm guest : Added configuration support to enable debug information for KVM Guests Raghavendra K T
2011-10-23 19:07 ` Raghavendra K T
2011-10-23 19:07 ` Raghavendra K T
2011-10-24 10:01 ` Sasha Levin
2011-10-24 18:45 ` Raghavendra K T
2011-10-24 18:45 ` Raghavendra K T
2011-10-24 18:45 ` Raghavendra K T
2011-10-24 10:01 ` Sasha Levin
2011-10-24 10:15 ` Avi Kivity
2011-10-25 18:11 ` Raghavendra K T
2011-10-25 18:30 ` Jeremy Fitzhardinge
2011-10-23 19:07 ` [PATCH RFC V2 5/5] kvm guest : pv-ticketlocks support for linux guests running on KVM hypervisor Raghavendra K T
2011-10-23 19:07 ` Raghavendra K T
2011-10-24 10:01 ` Sasha Levin
2011-10-24 9:33 ` Raghavendra K T
2011-10-24 9:33 ` Raghavendra K T
2011-10-24 9:33 ` Raghavendra K T
2011-10-25 18:34 ` Jeremy Fitzhardinge
2011-10-26 19:23 ` Raghavendra K T
2011-10-26 19:46 ` Jeremy Fitzhardinge
2011-10-26 19:55 ` Raghavendra K T
2011-10-25 18:35 ` Jeremy Fitzhardinge
2011-10-26 19:25 ` Raghavendra K T
2011-10-23 19:07 ` Raghavendra K T
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