[PATCH] Add a new TCP_IGNOREIDLE socket option

Alfred Perlstein bright at mu.org
Wed Jan 30 17:11:25 UTC 2013


On 1/30/13 11:58 AM, John Baldwin wrote:
> On Tuesday, January 29, 2013 6:07:22 pm Andre Oppermann wrote:
>>
>> Yes, unfortunately I do object.  This option, combined with the inflated
>> CWND at the end of a burst, effectively removes much, if not all, of the
>> congestion control mechanisms originally put in place to allow multiple
>> [TCP] streams co-exist on the same pipe.  Not having any decay or timeout
>> makes it even worse by doing this burst after an arbitrary amount of time
>> when network conditions and the congestion situation have certainly changed.
> You have completely ignored the fact that Linux has had this as a global
> option for years and the Internet has not melted.  A socket option is far more
> fine-grained than their tunable (and requires code changes, not something a
> random sysadmin can just toggle as "tuning").

I agree with John here.

While Andre's objection makes sense, since the majority of Linux/Unix 
hosts now have this as a global option I can't think of why you would 
force FreeBSD to be a final holdout.

-Alfred


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