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Date:      Wed, 30 Jun 1999 13:07:40 +0100
From:      "Peter McGarvey" <Networks.Manager@rncm.ac.uk>
To:        "Dutch Collins" <dutch@charm.net>
Cc:        <freebsd-newbies@FreeBSD.ORG>
Subject:   RE: Kernel Reentrancy - NT vs Linux
Message-ID:  <001f01bec2f1$26ce1720$24603fc1@brick.it-dept.rncm.ac.uk>
In-Reply-To: <377A03E6.4EF73BF8@charm.net>

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I've just looked at the following:

http://www.freebsd.org/releases/3.0R/notes.html

and found the following:

	"The kernel is mostly non-reentrant as yet, but work is under way"

So I would imagine FreeBSD's kernel is still non-reentrant.

The only way to truly check is something is fully reentrant is to read the
sources.  Now, I've never met anyone who's read the source for NT.  So, we
only have Microsoft's word that NT is indeed fully reentrant.

Of course I would never claim that a global player like Microsoft would lie
about this.



TTFN, FNORD

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 Peter McGarvey, Networks Manager  |  email: Networks.Manager@rncm.ac.uk
 Royal Northern College of Music   |    tel: +44 (0)161 907 5218
 124 Oxford Road, Manchester,      |    fax: +44 (0)161 273 7611
     England M13 9RD               | mobile: +44 (0)7887 990564
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> -----Original Message-----
> From: owner-freebsd-newbies@FreeBSD.ORG
> [mailto:owner-freebsd-newbies@FreeBSD.ORG]On Behalf Of Dutch Collins
> Sent: 30 June 1999 12:48
> To: Peter McGarvey
> Cc: freebsd-newbies@FreeBSD.ORG
> Subject: Re: Kernel Reentrancy - NT vs Linux
>
>
> Peter McGarvey wrote:
> >
> > I like the line on the MS Website that claims NT Server offers a "price
> > performance advantage over Linux"...
> >
> > How's this?
> >
> > Anyway this is a FreeBSD list so I'd like to see the same
> figures for NT vs.
> > FreeBSD.
> >
> > BTW, is the FreeBSD kernel reentrant?
> >
> > Actually, If you ask me it doesn't really matter.  It's only
> really an issue
> > with multiple processors.  For the cost of Windows NT Server
> with a dual CPU
> > machine you can have 2 FreeBSD machines (at least).  Besides, FreeBSD
> > doesn't need to waste 90% of it's resources running a useless GUI.
> >
> > TTFN, FNORD
> >
> >
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> >  Peter McGarvey, Networks Manager  |  email: Networks.Manager@rncm.ac.uk
> >  Royal Northern College of Music   |    tel: +44 (0)161 907 5218
> >  124 Oxford Road, Manchester,      |    fax: +44 (0)161 273 7611
> >      England M13 9RD               | mobile: +44 (0)7887 990564
> >
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> >
> > > -----Original Message-----
> > > From: owner-freebsd-newbies@FreeBSD.ORG
> > > [mailto:owner-freebsd-newbies@FreeBSD.ORG]On Behalf Of Dutch Collins
> > > Sent: 30 June 1999 03:25
> > > To: freebsd-newbies@FreeBSD.ORG
> > > Subject: Kernel Reentrancy - NT vs Linux
> > >
> > >
> > > If anyone is tasked to evaluate an OS for server applications you may
> > > want to check this out. I was not aware that Linux Kernel code was not
> > > reentrant. Well 'they' say it is fixed in 2.2, but it isn't.
> Now I have
> > > to find more info on the BSD kernel. Study? Where except the code?
> > >
> > > NT is better by 600%
> > > http://www.microsoft.com/ntserver/nts/exec/compares/ntlinux.asp
> > >
> > > Why Linux failed.
> > > http://www.ntmag.com/Magazine/Article.cfm?ArticleID=5048
> > >
> > > -dutch
>
> 0730 EDT -arg
>
> Well this is what I was thinking about. Microsoft is worried that Unix,
> not Linux will get the commerce business. That price/perfm. stuff is
> top notch BS with a big Bull.
>
> The FreeBSD 3.2 .src is somewhere on my CD. As far as I will quess -
> yes, or should be reentrant. I went to sun micro site (www.sun.com) for
> a while and will have a copy of Solaris 7 soon (for my other 486 box).
> Odd - my copy of Limux RH 5.2 is still in the box. Something in the docs
> turned me to FreeBSD - Real Unix.
>
> To make a shot story long - got to read the .src kernel comments. Also,
> sun.com has some commerce news patting themselves on the back about
> being NT tested. Go figure.
>
> -dutch
>
>
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