From: Paolo Bonzini <pbonzini@redhat.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>,
Joerg Roedel <jroedel@suse.de>
Cc: Joerg Roedel <joro@8bytes.org>, Gleb Natapov <gleb@kernel.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] kvm: irqchip: Break up high order allocations of kvm_irq_routing_table
Date: Mon, 11 May 2015 15:27:26 +0200 [thread overview]
Message-ID: <5550AE3E.6060705@redhat.com> (raw)
In-Reply-To: <5550A661.9000909@de.ibm.com>
On 11/05/2015 14:53, Christian Borntraeger wrote:
> Am 11.05.2015 um 14:50 schrieb Christian Borntraeger:
>
>> s390 has a route per device, but with 100 virtio-blk devices the difference seem
>> pretty much on the "dont care" side. qemu aio-poll/drain code seems to cause
>> much more delay since we elimited the kernel delays by using
>> synchronize_srcu_expedited.
>
> This is ambiguous:
> My point is: qemu did not get slower, it was already slow and the kernel got fast
> enough that it is no longer the slowest part.
Great, I'll apply the patch.
Paolo
next prev parent reply other threads:[~2015-05-11 13:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-08 12:31 [PATCH] kvm: irqchip: Break up high order allocations of kvm_irq_routing_table Joerg Roedel
2015-05-08 16:26 ` Paolo Bonzini
2015-05-11 11:25 ` Joerg Roedel
2015-05-11 11:45 ` Paolo Bonzini
2015-05-11 12:50 ` Christian Borntraeger
2015-05-11 12:53 ` Christian Borntraeger
2015-05-11 13:27 ` Paolo Bonzini [this message]
2015-06-05 10:50 ` Joerg Roedel
2015-06-05 11:39 ` Paolo Bonzini
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