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Date:      Thu, 14 Feb 2002 10:52:42 -0800
From:      Greg Lehey <grog@FreeBSD.org>
To:        Alfred Perlstein <alfred@FreeBSD.org>
Cc:        cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/sys/i386/conf GENERIC
Message-ID:  <20020214105242.A2226@sydney.worldwide.lemis.com>
In-Reply-To: <20020213172335.C63886@elvis.mu.org>; from alfred@FreeBSD.org on Wed, Feb 13, 2002 at 05:23:35PM -0800
References:  <200202131847.g1DIlp851160@freefall.freebsd.org> <20020213170750.B732@sydney.worldwide.lemis.com> <20020213172335.C63886@elvis.mu.org>

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On Wednesday, 13 February 2002 at 17:23:35 -0800, Alfred Perlstein wrote:
> * Greg Lehey <grog@FreeBSD.org> [020213 17:08] wrote:
>> On Wednesday, 13 February 2002 at 10:47:51 -0800, Alfred Perlstein wrote:
>>> alfred      2002/02/13 10:47:51 PST
>>>
>>>   Modified files:
>>>     sys/i386/conf        GENERIC
>>>   Log:
>>>   Re-enable WITNESS for GENERIC.  Since the 5.x branch is mostly about
>>>   SMP we'd like as much feedback as possible from users about possible
>>>   locking problems as early as possible.
>>
>> Why did you do that when obviously rwatson disagreed?  The correct
>> thing to do would have been to get a consensus first and give rwatson
>> the opportunity to back it out.  Note that we definitely don't have a
>> consensus.
>>
>>>   To negate most of the performance impact I've also enabled
>>>   WITNESS_SKIPSPIN.  I've done this as we've been running WITNESS
>>>   over the spinlock code for a while without incident and it goes a
>>>   long way to making the performance problems of WITNESS much more
>>>   bearable.
>>
>> This might be a good compromise.  But we need to agree first.
>
> This issue has been resolved, the WITNESS_SKIPSPIN stuff seems to have
> made people a bit more comfortable about it.

That's the technical issue.  It doesn't address the issue of backing
out other people's commits without consultation.

Greg
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