Date: Wed, 16 Dec 1998 14:31:32 +0000 From: Tony Finch <dot@dotat.at> To: robinson@netrinsics.com, fenner@parc.xerox.com, freebsd-net@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG Subject: Re: MLEN < write length < MINCLSIZE "bug" Message-ID: <E0zqHzA-0000Le-00@fanf.noc.demon.net> In-Reply-To: <m2n.s.0zpy3y-000CMa@chiark.greenend.org.uk> References: <199812151555.PAA07456@netrinsics.com>
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Bill Fenner <fenner@parc.xerox.com> wrote:
>In message <199812151555.PAA07456@netrinsics.com> you write:
>>
>>Is there any documentation on why MINCLSIZE is currently set to the value it
>>is?
>
>Not that I know of, but I can't say for sure that there's not something
>in the 4.4 daemon book.
Having read this bit of the red demon book recently (although I can't
find the precise reference again at the moment), ISTR that the
heuristic is that since allocating an mbuf with a cluster takes two
allocations, MINCLSIZE is just bigger than two mbufs.
Tony.
--
f.a.n.finch**waster
dot@dotat.at
fanf@demon.net
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