svn commit: r227778 - head/sys/net

Lawrence Stewart lstewart at freebsd.org
Mon Nov 21 05:55:44 UTC 2011


On 11/21/11 16:12, Ben Kaduk wrote:
> On Sun, Nov 20, 2011 at 11:17 PM, Lawrence Stewart<lstewart at freebsd.org>  wrote:
>> Author: lstewart
>> Date: Mon Nov 21 04:17:24 2011
>> New Revision: 227778
>> URL: http://svn.freebsd.org/changeset/base/227778
>>
>> Log:
>>   - When feed-forward clock support is compiled in, change the BPF header to
>>     contain both a regular timestamp obtained from the system clock and the
>>     current feed-forward ffcounter value. This enables new possibilities including
>
> Is it really necessary to make the ABI dependent on a kernel
> configuration option?  This causes all sorts of headaches if loadable
> modules ever want to use that ABI, something that we just ran into
> with vm_page_t and friends and had a long thread on -current about.

Fair question. Julien, if pcap and other consumers will happily ignore 
the new ffcount_stamp member in the bpf header, is there any reason to 
conditionally add the ffcounter into the header struct?

Cheers,
Lawrence


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