From owner-freebsd-hackers@FreeBSD.ORG Fri Jun 30 20:32:35 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7DE6E16A49E for ; Fri, 30 Jun 2006 20:32:35 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail29.syd.optusnet.com.au (mail29.syd.optusnet.com.au [211.29.132.171]) by mx1.FreeBSD.org (Postfix) with ESMTP id 929E944314 for ; Fri, 30 Jun 2006 20:32:34 +0000 (GMT) (envelope-from peterjeremy@optushome.com.au) Received: from turion.vk2pj.dyndns.org (c220-239-19-236.belrs4.nsw.optusnet.com.au [220.239.19.236]) by mail29.syd.optusnet.com.au (8.12.11/8.12.11) with ESMTP id k5UKWRjv017470 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Sat, 1 Jul 2006 06:32:27 +1000 Received: from turion.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by turion.vk2pj.dyndns.org (8.13.6/8.13.6) with ESMTP id k5UKWQhZ008393; Sat, 1 Jul 2006 06:32:26 +1000 (EST) (envelope-from peter@turion.vk2pj.dyndns.org) Received: (from peter@localhost) by turion.vk2pj.dyndns.org (8.13.6/8.13.6/Submit) id k5UKWQjl008392; Sat, 1 Jul 2006 06:32:26 +1000 (EST) (envelope-from peter) Date: Sat, 1 Jul 2006 06:32:26 +1000 From: Peter Jeremy To: Hans Petter Selasky Message-ID: <20060630203226.GG734@turion.vk2pj.dyndns.org> References: <200605271102.19799.hselasky@c2i.net> <200606021556.00231.hselasky@c2i.net> <200606131939.23799.hselasky@c2i.net> <200606302029.28563.hselasky@c2i.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Yia77v5a8fyVHJSl" Content-Disposition: inline In-Reply-To: <200606302029.28563.hselasky@c2i.net> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.11 Cc: freebsd-hackers@freebsd.org Subject: Re: contiguous memory allocation problem X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Jun 2006 20:32:35 -0000 --Yia77v5a8fyVHJSl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, 2006-Jun-30 20:29:28 +0200, Hans Petter Selasky wrote: >I sometimes see that the USB driver is unable to allocate contiguous memor= y=20 >for itself. For example I noticed that FreeBSD was unable to allocate=20 >350kbytes of contiguous memory after that I had run "konqueror", the KDE w= eb=20 >browser and various other memory consuming applications for a while. I reported this about 18 months ago and I'm fairly certain you even contributed to the thread at the time. >Any comments? The latest concensus seems to be that the USB system should make use of the scatter-gather facilities in the hardware to avoid the need to allocate large contiguous memory chunks. iedowse@ had mostly finished implementing this in mid May. --=20 Peter Jeremy --Yia77v5a8fyVHJSl Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFEpYpZ/opHv/APuIcRAjxVAKCTqQ0w/BhWCkGJ2Xg5fZE/MyALswCcDxw2 9FmvK4D82NGvlcZj1JE9+ng= =DFrr -----END PGP SIGNATURE----- --Yia77v5a8fyVHJSl--