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Date:      Mon, 15 Jul 2013 08:24:09 -0700
From:      Alfred Perlstein <alfred@ixsystems.com>
To:        Glen Barber <gjb@FreeBSD.org>
Cc:        Andre Oppermann <andre@freebsd.org>, stable@freebsd.org, re@freebsd.org
Subject:   Re: status of autotuning freebsd for 9.2
Message-ID:  <51E41419.3040503@ixsystems.com>
In-Reply-To: <20130715141300.GA1986@glenbarber.us>
References:  <51D90B9B.9080209@ixsystems.com> <51D92826.1070707@freebsd.org> <51E1061F.3050804@ixsystems.com> <51E398F3.40008@freebsd.org> <51E3EEAA.3040106@freebsd.org> <51E3EFA8.1050606@ixsystems.com> <20130715141300.GA1986@glenbarber.us>

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On 7/15/13 7:13 AM, Glen Barber wrote:
> On Mon, Jul 15, 2013 at 05:48:40AM -0700, Alfred Perlstein wrote:
>> On 7/15/13 5:44 AM, Andre Oppermann wrote:
>>> On 15.07.2013 08:38, Andre Oppermann wrote:
>>>> On 13.07.2013 09:47, Alfred Perlstein wrote:
>>>>> Andre, we have a number of people running this patch in the
>>>>> following configurations:
>>>>>
>>>>> 6-8GB ram + 10gigE ethernet using iozone over NFS.
>>>> As you haven't seen any problems yet I've asked RE to green light
>>>> the MFC.
>>> RE has rejected the MFC out of fears for unexpected regressions.
>>>
>> That is unfortunate.  I guess re@ doesn't understand that FreeBSD
>> 9.2 will be unusable out of the box for doing 10gigE for more than a
>> few microseconds.
>>
>> Can we not just do my original patch that has the check for 64bit
>> pointers before unscaling maxusers?  That would be dirt simple and
>> just work with minimal risk.
>>
> IMHO, this is considered a new feature, and not a critical bug fix.  re@
> asked from the start of the code slush to avoid new features, and at
> this point, it is too late.  It is not worth introducing possible
> regressions, which will only delay the 9.2-RELEASE.
>
> Glen
>
OK, then we need a release notes telling people a sane value for 
nmbclusters and friends so that they know how to make 10gigE work.

I'll poll my team for a value if someone else has one, that would be 
even better.

-- 
Alfred Perlstein
VP Software Engineering, iXsystems




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