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Date:      Tue, 01 Jan 2008 18:01:13 +0100
From:      Kris Kennaway <kris@FreeBSD.org>
To:        Roman Divacky <rdivacky@freebsd.org>
Cc:        freebsd-performance@freebsd.org, Vlad GALU <dudu@dudu.ro>
Subject:   Re: mysql scaling questions
Message-ID:  <477A71D9.1050508@FreeBSD.org>
In-Reply-To: <20080101163325.GA98449@freebsd.org>
References:  <47779EBC.5020900@FreeBSD.org> <20071230134354.GA63555@harmless.hu>	<4777A65C.8020406@FreeBSD.org> <20071230141118.GA67574@harmless.hu>	<4777AB9C.1010003@FreeBSD.org> <flb6bp$8kq$1@ger.gmane.org>	<4779BBE8.2050608@FreeBSD.org> <20080101122249.GA81405@harmless.hu>	<477A32EA.4070500@FreeBSD.org>	<ad79ad6b0801010534u3336c2d5l630c1d18a8a493cd@mail.gmail.com> <20080101163325.GA98449@freebsd.org>

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Roman Divacky wrote:
>>    BTW, now with COMPAT_43 gone out of GENERIC, is it necesary to keep
>> COMPAT_43TTY, even when Linux emulation is not needed?
> 
> COMPAT_43TTY just adds a bunch of sysctls, it does not slow down anything.
> COMPAT_43 did slow down things (the getpid for example) and it was removed.
> I dont see any problem :)

It is likely to remain in people's custom kernels, possibly including 
the one used by Ivan.  Anyway, this is all speculation until someone 
studies the claims in more detail.

Kris




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