From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH] virtio: make udp more efficient by avoiding indirect
 desc
Date: Wed, 12 Feb 2014 09:59:26 +0100
Message-ID: <52FB37EE.1090208@redhat.com>
References: <52FA3AAC.2050003@huawei.com> <20140211154308.GA467@redhat.com>
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Cc: rusty@rustcorp.com.au, jasowang@redhat.com,
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To: "Michael S. Tsirkin" <mst@redhat.com>,
	Qin Chuanyu <qinchuanyu@huawei.com>
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Il 11/02/2014 16:43, Michael S. Tsirkin ha scritto:
>> > Signed-off-by: Chuanyu Qin <qinchuanyu@huawei.com>
> Optimization patch without any performance data?
> Such a change would need much more testing than that:
> would have to try various workloads with -net and -blk at least.
>

-blk and -scsi never use 2 descriptors except for flushes (which go all 
the way to the platters or flash, and are not as frequent as other I/O). 
  So the patch is in all likelihood a no-op there.

Of course, virtio-net does need data.

Paolo