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Date:      Sat, 1 Oct 2005 04:11:25 -0400
From:      Kris Kennaway <kris@obsecurity.org>
To:        Ansar Mohammed <ansarm@gmail.com>
Cc:        freebsd-questions@freebsd.org, 'Kris Kennaway' <kris@obsecurity.org>
Subject:   Re: BGL
Message-ID:  <20051001081124.GA63863@xor.obsecurity.org>
In-Reply-To: <000901c5c63c$5c2fa190$0b02a8c0@northamerica.corp.microsoft.com>
References:  <20050930204601.GA31598@xor.obsecurity.org> <000901c5c63c$5c2fa190$0b02a8c0@northamerica.corp.microsoft.com>

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On Fri, Sep 30, 2005 at 11:58:14PM -0400, Ansar Mohammed wrote:
> I love FreeBSD. I have been using it since 2.x. I have never had any
> problems with it. Rock Solid. Never a single kernel panic.
>=20
> Then I come across this article in a comparison between Linux and FreeBSD
> saying that FreeBSD has kernel locking issues. Specifically, a problem
> nicknamed BGL or Big Giant Lock. It seems that it affects SMP systems und=
er
> high load.

Sounds like a pretty simplistic summary, but as I mentioned it's out
of date anyway.

> How much do other OSes suffer from this?

I think NetBSD and OpenBSD still use such a system for their SMP
support.

Kris

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