On 12/06/2011 04:09 AM, Ben Hutchings wrote:
On Mon, 2011-12-05 at 16:58 +0800, Jason Wang wrote:
This patch adds a simple flow director to tun/tap device. It is just a
page that contains the hash to queue mapping which could be changed by
user-space. The backend (tap/macvtap) would query this table to get
the desired queue of a packets when it send packets to userspace.
This is just flow hashing (RSS), not flow steering.
The page address were set through a new kind of ioctl - TUNSETFD and
were pinned until device exit or another new page were specified.
[...]
You should implement ethtool ETHTOOL_{G,S}RXFHINDIR instead.
Ben.
I'm not fully understanding this. The page belongs to guest, and the
idea is to let guest driver can easily change any entry. Looks like if
ethtool_set_rxfh_indir() is used, this kind of change is not easy as it
needs one copy and can only accept the whole table as its parameters.
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