> On Jul 16, 2015, at 4:44 PM, Ben Pfaff <b...@nicira.com> wrote:
> 
> On Thu, Jul 16, 2015 at 03:15:54PM -0700, Jarno Rajahalme wrote:
>> Use two maps in miniflow to allow for expansion of struct flow past
>> 512 bytes.  We now have one map for tunnel related fields, and another
>> for the rest of the packet metadata and actual packet header fields.
>> This split has the benefit that for non-tunneled packets the overhead
>> should be minimal.
>> 
>> Some miniflow utilities now exist in two variants, new ones operating
>> over all the data, and the old ones operating only on a single 64-bit
>> map at a time.  The old ones require doubling of code but should
>> execute faster, so those are used in the datapath and classifier's
>> lookup path.
>> 
>> Signed-off-by: Jarno Rajahalme <jrajaha...@nicira.com>
> 
> I consistently get a test failure in test 636 "tunnel_push_pop - action"
> with this commit.  The failure looks like this:
> 
> ../../tests/tunnel-push-pop.at:131: ovs-ofctl dump-ports int-br | grep 'port  
> 5'
> --- -   2015-07-16 16:43:05.417520479 -0700
> +++ /home/blp/nicira/ovs/_build/tests/testsuite.dir/at-groups/636/stdout      
>   2015-07-16 16:43:05.410146027 -0700
> @@ -1,2 +1,2 @@
> -  port  5: rx pkts=1, bytes=98, drop=0, errs=0, frame=0, over=0, crc=0
> +  port  5: rx pkts=0, bytes=0, drop=0, errs=0, frame=0, over=0, crc=0
> 
> I also get a single "sparse" warning though I don't know whether it is
> related:
> 
> ../lib/flow.c:466:13: warning: cast truncates bits from constant value 
> (3ffffffff becomes ffffffff)

It seems related, I had used type size_t for a 64-bit mask, and the warning is 
catching that. This also very likely causes the test failure you see. I don’t 
currently have a working 32-bit cross compilation setup, so I’m sending a v4 
with high hopes that this was the only remaining issue.

  Jarno


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