Date: Thu, 02 Nov 2000 13:07:53 +0900 From: Jun-ichiro itojun Hagino <itojun@iijlab.net> To: Luigi Rizzo <rizzo@aciri.org> Cc: websoft@yahoo.com, freebsd-questions@FreeBSD.ORG, freebsd-net@FreeBSD.ORG Subject: Re: mbuf and MINCLSIZE Message-ID: <20001102040753.A91127E56@starfruit.itojun.org> In-Reply-To: rizzo's message of Wed, 01 Nov 2000 18:44:26 PST. <200011020244.SAA03643@iguana.aciri.org>
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>> 101 meaning MHLEN + 1, right? on KAME IPv6 merge, we happened to >> do that. >didn't we move to 256-byte clusters some time ago, hence >MHLEN is larger than that ? that is not the point. traditionally MINCLSIZE was MHLEN + MLEN + 1, and it made drivers to emit: MHLEN mbuf (len <= MHLEN) MHLEN mbuf + MLEN mbuf (len <= MHLEN + MLEN) MCLBYTES cluster mbuf (len > MHLEN + MLEN) Richard proposes to move MINCLSIZE to MHLEN + 1, and will effectively make drivers to emit: MHLEN mbuf (len <= MHLEN) MCLBYTES cluster mbuf (len > MHLEN) the latter stragegy will save us from m_pullup. itojun To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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