[ovs-git] Open vSwitch: datapath: Increase maximum number of actions per flow. (master)

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commit 722d19c504351a3e1a6f64e5a01ff9806eb089a4
Diffs: http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=commitdiff;h=722d19c504351a3e1a6f64e5a01ff9806eb089a4
Author: Ben Pfaff <blp at nicira.com>
		
datapath: Increase maximum number of actions per flow.
		
Until now the number of actions in a flow has been limited to what fits in
a page.  Each action is 8 bytes, and on 32-bit architectures there is a
12-byte header, so with 4-kB pages that limits flows to 510 actions.  We
and Citrix have noticed that OVS stops working properly after about 509
VIFs are added to a bridge.  According to log messages this is the reason:
at this point it is no longer possible to flood a packet to all ports.

This commit should help, by increasing the maximum number of actions in a
flow.  In the long term, though, we should adopt use of port groups or
otherwise reduce the number of actions needed to flood a packet.

Signed-off-by: Ben Pfaff <blp at nicira.com>
Bug #3573.
NIC-234.


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Summary of changes:
 datapath/flow.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)


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