From owner-freebsd-net Mon Jul 10 8:18: 8 2000 Delivered-To: freebsd-net@freebsd.org Received: from khavrinen.lcs.mit.edu (khavrinen.lcs.mit.edu [18.24.4.193]) by hub.freebsd.org (Postfix) with ESMTP id 882C737C58F for ; Mon, 10 Jul 2000 08:18:05 -0700 (PDT) (envelope-from wollman@khavrinen.lcs.mit.edu) Received: (from wollman@localhost) by khavrinen.lcs.mit.edu (8.9.3/8.9.3) id LAA53686; Mon, 10 Jul 2000 11:17:57 -0400 (EDT) (envelope-from wollman) Date: Mon, 10 Jul 2000 11:17:57 -0400 (EDT) From: Garrett Wollman Message-Id: <200007101517.LAA53686@khavrinen.lcs.mit.edu> To: Alfred Perlstein Cc: net@freebsd.org Subject: argh! Re: weird things with M_EXT and large packets In-Reply-To: <20000709205124.A25571@fw.wintelcom.net> References: <20000709140441.T25571@fw.wintelcom.net> <20000709205124.A25571@fw.wintelcom.net> Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org < said: > Is there a specific reason the network drivers (or at least fxp) > don't seem to check page boundries so that discontig kmem can be > passed to the drivers in large chunks? Yes -- because it ``can't happen'', and in the normal case it would never happen so there's no point in wasting cycles to check for it. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message