From: Avi Kivity <avi@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org, Gregory Haskins <gregory.haskins@gmail.com>
Subject: Re: [patch 3/4] KVM: introduce irq_lock, use it to protect ioapic
Date: Tue, 26 May 2009 14:33:33 +0300 [thread overview]
Message-ID: <4A1BD38D.6040207@redhat.com> (raw)
In-Reply-To: <20090525111114.GC2789@amt.cnet>
Marcelo Tosatti wrote:
> On Sun, May 24, 2009 at 05:10:07PM +0300, Avi Kivity wrote:
>
>> Marcelo Tosatti wrote:
>>
>>> Subject says it all.
>>>
>>>
>> I hate those changelogs. I guess Subject never reviews code.
>>
>> You might put some evidence that we're suffering from contention here
>> (I'm very willing to believe it, but hard evidence is better).
>>
>
> Don't have any evidence yet, the main purpose of the split is to fix the
> deadlock.
>
You might have said that.
> But, with the data we have so far, slots_lock and kvm->lock will cause
> significant cache bouncing on EPT hardware (with measurements on shadow
> mmu_lock is #1 offender).
>
Well, mmu_lock is probably contended, which is much worse than just
cache bouncing.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2009-05-26 11:33 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-18 16:56 [patch 0/4] move irq protection role to separate kvm->irq_lock Marcelo Tosatti
2009-05-18 16:56 ` [patch 1/4] KVM: x86: grab pic lock in kvm_pic_clear_isr_ack Marcelo Tosatti
2009-05-18 16:56 ` [patch 2/4] KVM: move coalesced_mmio locking to its own device Marcelo Tosatti
2009-05-20 12:06 ` Avi Kivity
2009-05-20 14:09 ` Marcelo Tosatti
2009-05-20 14:29 ` Avi Kivity
2009-05-20 15:13 ` Marcelo Tosatti
2009-05-20 15:22 ` Marcelo Tosatti
2009-05-20 15:22 ` Avi Kivity
2009-05-20 18:48 ` [patch 0/4] move irq protection role to separate lock v2 Marcelo Tosatti
2009-05-20 18:48 ` [patch 1/4] KVM: x86: grab pic lock in kvm_pic_clear_isr_ack Marcelo Tosatti
2009-05-20 18:48 ` [patch 2/4] KVM: move coalesced_mmio locking to its own device Marcelo Tosatti
2009-05-24 14:04 ` Avi Kivity
2009-05-25 11:04 ` Marcelo Tosatti
2009-05-26 11:24 ` Avi Kivity
2009-05-26 13:15 ` Marcelo Tosatti
2009-05-26 13:27 ` Avi Kivity
2009-05-20 18:48 ` [patch 3/4] KVM: introduce irq_lock, use it to protect ioapic Marcelo Tosatti
2009-05-24 14:10 ` Avi Kivity
2009-05-25 11:11 ` Marcelo Tosatti
2009-05-26 11:33 ` Avi Kivity [this message]
2009-05-28 4:45 ` [patch 0/4] move irq protection role to separate lock v3 Marcelo Tosatti
2009-05-28 4:45 ` [patch 1/4] KVM: x86: grab pic lock in kvm_pic_clear_isr_ack Marcelo Tosatti
2009-05-28 4:45 ` [patch 2/4] KVM: move coalesced_mmio locking to its own device Marcelo Tosatti
2009-05-31 12:14 ` Avi Kivity
2009-06-01 21:23 ` Marcelo Tosatti
2009-06-01 21:43 ` Avi Kivity
2009-06-04 18:08 ` [patch 0/4] move irq protection role to separate lock v4 Marcelo Tosatti
2009-06-04 18:08 ` [patch 1/4] KVM: x86: grab pic lock in kvm_pic_clear_isr_ack Marcelo Tosatti
2009-06-04 18:08 ` [patch 2/4] KVM: move coalesced_mmio locking to its own device Marcelo Tosatti
2009-06-04 18:08 ` [patch 3/4] KVM: introduce irq_lock, use it to protect ioapic Marcelo Tosatti
2009-06-04 18:08 ` [patch 4/4] KVM: switch irq injection/acking data structures to irq_lock Marcelo Tosatti
2009-06-08 9:18 ` [patch 0/4] move irq protection role to separate lock v4 Avi Kivity
2009-05-28 4:45 ` [patch 3/4] KVM: introduce irq_lock, use it to protect ioapic Marcelo Tosatti
2009-05-28 4:45 ` [patch 4/4] KVM: switch irq injection/acking data structures to irq_lock Marcelo Tosatti
2009-05-20 18:48 ` [patch 4/4] KVM: switch irq injection/acking " Marcelo Tosatti
2009-05-21 4:50 ` [patch 0/4] move irq protection role to separate lock v2 Marcelo Tosatti
2009-05-21 6:55 ` Christian Bornträger
2009-05-21 7:26 ` Avi Kivity
2009-05-21 14:32 ` Marcelo Tosatti
2009-05-21 15:02 ` Avi Kivity
2009-05-18 16:56 ` [patch 3/4] KVM: introduce irq_lock, use it protect ioapic Marcelo Tosatti
2009-05-20 12:11 ` Avi Kivity
2009-05-20 14:11 ` Marcelo Tosatti
2009-05-20 14:29 ` Avi Kivity
2009-05-18 16:56 ` [patch 4/4] KVM: switch irq injection/acking to irq_lock Marcelo Tosatti
2009-05-20 12:15 ` Gregory Haskins
2009-05-20 14:16 ` Marcelo Tosatti
2009-05-24 14:53 ` Avi Kivity
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