h_ertt cc_vegas loader.conf interaction on stable/8

[Lawrence Stewart]

On 09/21/11 16:11, Jason Hellenthal wrote:
>
>
> On Wed, Sep 21, 2011 at 02:08:33PM +1000, Lawrence Stewart wrote:
>> On 09/21/11 13:32, Jason Hellenthal wrote:
>>>
>>> Hi Larence,
>>>
>>> On Wed, Sep 21, 2011 at 12:39:28PM +1000, Lawrence Stewart wrote:
>>>> Hi Jason,
>>>>
>>>> On 09/20/11 14:27, Jason Hellenthal wrote:
>>>>>
>>>>> On stable/8 as of the date of this message when attempting the following
>>>>> configuration the sysctl MIB net.inet.tcp.cc.algorithm is not available
>>>>> for /etc/sysctl.conf to tune for whatever reason.
>>>>>
>>>>> /boot/loader.conf:
>>>>> h_ertt_load="YES"
>>>>> cc_vegas_load="YES"
>>>>>
>>>>> /etc/sysctl.conf:
>>>>> net.inet.tcp.cc.algorithm=vegas
>>>>>
>>>>>
>>>>> After boot the system still has the congestion algo set to 'newreno'
>>>>
>>>> Does "sysctl net.inet.tcp.cc.available" after boot show only 'newreno'
>>>> in the list? Or is 'vegas' listed as well after 'newreno', even though
>>>> 'newreno' is listed by "sysctl net.inet.tcp.cc.algorithm"?
>>>
>>> Only 'newreno'
>>
>> Ok, definitely a bug then. Should be simple to reproduce, so I'll track
>> it down and send through a patch for testing when I've got something.
>>
>
> Alright, Ill await the patch for testing.

hmm, I just tested with 8.2-STABLE r225712 in virtualbox with identical 
configuration to what you tried and it works for me. System boots with 
net.inet.tcp.cc.available as "newreno, vegas" and 
net.inet.tcp.cc.algorithm as "vegas".

Anything special about your kernel config? Did you build and install the 
modules via "make buildkernel installkernel"? What other kernel modules 
do you have loaded?

Cheers,
Lawrence