Return-path: Received: from xc.sipsolutions.net ([83.246.72.84]:44003 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752731AbYJGRIu (ORCPT ); Tue, 7 Oct 2008 13:08:50 -0400 Subject: Re: bad DMAR interaction with iwlagn and SATA From: Johannes Berg To: Kyle McMartin Cc: Andres Freund , Tomas Winkler , Muli Ben-Yehuda , Jeff Garzik , linux-kernel@vger.kernel.org, linux-wireless In-Reply-To: <20081007170404.GB5171@bombadil.infradead.org> References: <200809251511.20132.andres@anarazel.de> <1ba2fa240809290140i5a47d534qa30f9088df834162@mail.gmail.com> <1223296015.15196.2.camel@johannes.berg> <200810061632.08375.andres@anarazel.de> <1223368636.3778.64.camel@johannes.berg> <20081007170404.GB5171@bombadil.infradead.org> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-wsyw07jVLbAhv9X7WnUT" Date: Tue, 07 Oct 2008 19:08:43 +0200 Message-Id: <1223399323.7328.51.camel@johannes.berg> (sfid-20081007_190854_380759_A78192FD) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-wsyw07jVLbAhv9X7WnUT Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Tue, 2008-10-07 at 13:04 -0400, Kyle McMartin wrote: > 2MB pages (and 4MB pages) are dependent on PSE/PAE, there's no configurab= le > page size on x86 like there is on other platforms. >=20 > PSE gives you 4MB pages, PAE reduces your 4MB pages to 2MB pages (for > extra flag and address bits.) >=20 > About the only useful places for these are large mappings like ioremap > and whatnot. Thanks for the explanation. Can you explain too why iwlwifi crashes when I enable 64k pages? ;) johannes --=-wsyw07jVLbAhv9X7WnUT Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIcBAABAgAGBQJI65eXAAoJEKVg1VMiehFYn5cP/2goTM4qQelVufRLQaMTXBXS ODMuyveZb6EsGx10bvqtVCQX6xnHzAnx297dWon/VpjbKi2VPg6DKIcLryC3Lju4 lt/KqtsKFXUv5BP/Cp1CAZpYO22xsTizZeuToQWCpPLN88ysfAuBbnDgHIZHZh6y mhYdxUtHgARU88tZl6gSR58ReNW9KNopy6JP2t82EPJMsZiNhcvdEQo+ceY9eJCt GHIsqGSF9RrEKeUkpavUuZMbH9c6q+BqdM4PSElga/dUIlZaJV2xiU66XUXPCBlf 4mQeRQ/vK/a+LmJDDHZ1gjZ7Nyc9SOcFkItIIEjkDRdThKQTSg47koUBRBx4tbWz NK3mRB3J6OAhM20J0HGLjiYFf2xb+vk6FrBbmbZzuRym3C6dxftZFIw90ueO6m4l ifxyZQRt7iByjcbaIVxmwFzPyi+iQRtxErVJU9W0fH8HpETihP2jNchHA3+vhlKD eMsR8zS2FK/iu76/tY8/Jsp5fVDbhDYIabSJ8ocpJF8zKA+IPeGdHcrdYzTnu4lc S1uWgBDMhxafMGSZS+FZJiz5U8bUUTKSY+aPUgxka06ThLn4R44RP4VNRaHKwEFx /esCw1F9kxYSt1jAdIFDJy/PicQ/Tq6R/DwUZUI3zSwanX8p/CufiBj6hEaofEEw 8SO0x0mkrJbqIx7HY+er =DbQF -----END PGP SIGNATURE----- --=-wsyw07jVLbAhv9X7WnUT--