From: Stephen Hemminger <shemminger@vyatta.com>
To: "Peter Huang(Peng)" <peter.huangpeng@huawei.com>
Cc: kvm@vger.kernel.org, mst@redhat.com, netdev@vger.kernel.org,
virtualization@lists.linux-foundation.org, avi@redhat.com
Subject: Re: [Question]About KVM network zero-copy feature!
Date: Sat, 11 Aug 2012 13:55:56 -0700 [thread overview]
Message-ID: <20120811135556.58ddf48d@nehalam.linuxnetplumber.net> (raw)
In-Reply-To: <50248148.4070204@huawei.com>
On Fri, 10 Aug 2012 11:34:32 +0800
"Peter Huang(Peng)" <peter.huangpeng@huawei.com> wrote:
> Hi,All
>
> I searched from git-log, and found that until now we have vhost TX zero-copy experiment feature, how
> about RX zero-copy?
>
> For XEN, net-back also only has TX zero-copy, Is there any reason that RX zero-copy still not implemented?
>
There is no guarantee that packet will ever be read by receiver. This means zero-copy could
create memory back pressure stalls.
next prev parent reply other threads:[~2012-08-11 20:55 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-10 3:34 [Question]About KVM network zero-copy feature! Peter Huang(Peng)
2012-08-11 20:55 ` Stephen Hemminger [this message]
2012-08-11 21:54 ` Robert Vineyard
2012-08-12 0:42 ` Robert Vineyard
2012-08-12 0:42 ` Robert Vineyard
2012-08-12 9:37 ` Michael S. Tsirkin
2012-08-12 9:37 ` Michael S. Tsirkin
2012-08-13 1:24 ` Peter Huang(Peng)
2012-08-13 7:18 ` Michael S. Tsirkin
2012-08-13 3:45 ` Robert Vineyard
2012-08-13 3:45 ` Robert Vineyard
2012-08-13 5:59 ` Robert Vineyard
2012-08-13 5:59 ` Robert Vineyard
2012-08-11 21:54 ` Robert Vineyard
-- strict thread matches above, loose matches on Subject: below --
2012-08-10 3:34 Peter Huang(Peng)
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