From owner-freebsd-hackers  Thu Jul 26 23:15:33 2001
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Date: Thu, 26 Jul 2001 23:15:54 -0700
From: Terry Lambert <tlambert2@mindspring.com>
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To: Bosko Milekic <bmilekic@technokratis.com>
Cc: Alfred Perlstein <bright@mu.org>,
	Zhihui Zhang <zzhang@cs.binghamton.edu>,
	vishwanath pargaonkar <vishubp@yahoo.com>,
	freebsd-hackers@FreeBSD.ORG
Subject: Re: cluster size
References: <20010725140737.A25132@technokratis.com> <Pine.SOL.4.21.0107251416550.21505-100000@opal> <20010725143649.A25300@technokratis.com> <3B6050D1.9DCCD23@mindspring.com> <20010726133617.B33517@technokratis.com> <20010726123900.E26571@elvis.mu.org> <3B6058AC.32F6B2EB@mindspring.com> <20010726140437.A33713@technokratis.com>
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Bosko Milekic wrote:
> > > Er, wouldn't that be the only way for cards to refil thier DMA
> > > recieve buffers?
> >
> > Look at the Tigon II and FXP drivers.  The allocations in
> > the macros turn into m_get, not m_clusterget.
> 
>         From if_fxp.c (fxp_add_rfabuf(), sometimes called from fxp_intr()):
> 
>         MGETHDR(...);  <-- get mbuf
>         if (m != NULL) {
>                 MCLGET(...); <-- get cluster
>                 ...
>         }

Yes, I had misread things.  Alfred pointed this out to me in
person, earlier.  I had been reading the jumbogram code,
which uses a seperate buffer space, and then just incorrectly
assumed.

Thanks for getting thecorrection into the list archives, so
that future readers will be less confused: you spared me
having to do the same.

-- Terry

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