Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 1 Jan 2003 16:22:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 1 Jan 2003 16:22:09 -0500 Received: from [81.5.149.242] ([81.5.149.242]:48863 "EHLO bowl.fysh.org") by vger.kernel.org with ESMTP id ; Wed, 1 Jan 2003 16:22:08 -0500 Date: Wed, 1 Jan 2003 21:30:34 +0000 From: Athanasius To: linux-kernel Subject: Re: 2.4.21-pre21 - Dodgy DMA with PIIX4 Message-ID: <20030101213034.GB10404@miggy.org> Mail-Followup-To: Athanasius , linux-kernel References: <20021227134551.GH1878@miggy.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="XsQoSWH+UP9D9v3l" Content-Disposition: inline In-Reply-To: <20021227134551.GH1878@miggy.org> User-Agent: Mutt/1.3.28i X-gpg-fingerprint: 95DFC4A7 X-gpg-key: http://www.fysh.org/~athan/gpg-key Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3428 Lines: 94 --XsQoSWH+UP9D9v3l Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Dec 27, 2002 at 01:45:51PM +0000, Athanasius wrote: > Hi, > I've a machine based around a Gigabyte GA-686BX motherboard, using the > Intel 440BX/ZX chipset: >=20 > On kernel 2.4.18-pre8 I was able to set MDMA modes on all 4 of my hard > disks: >=20 > /dev/hda: Model=3DST32122A, FwRev=3D3.02, SerialNo=3DXKF67385 > /dev/hdb: Model=3DMaxtor 82560 A4 -, FwRev=3DAA8Z2225, SerialNo=3DC40AHFXA > /dev/hdc: Model=3DMaxtor 94098U8, FwRev=3DFA500S60, SerialNo=3DG80EK51C > /dev/hdd: Model=3DMaxtor 4G120J6, FwRev=3DGAK819K0, SerialNo=3DG60E058E >=20 > using: >=20 > /sbin/hdparm -u1 -d1 -X34 /dev/hda > /sbin/hdparm -u1 -d1 -X34 /dev/hdb > /sbin/hdparm -u1 -d1 -X34 /dev/hdc > /sbin/hdparm -u1 -d1 -X34 /dev/hdd >=20 > The motherboard doesn't do UltraDMA, so these MDMA modes were the best I I was wrong about this, I'm sure I'd looked at the docs before and found it didn't do UDMA ho hum, anyway... > On 2.4.21-pre21 I can set this for hda and hdb, but then quickly end > up with the machine locked up with DMA failing on hda. It did so whilst > editting the command to rerun it for hdc, i.e. within 10-15s. Looks like the problematic thing on 2.4.21pre2 is the -u1 switch to hdparm. I'd carefully tested this before and never had any trouble with it. I guess the IDE code has changed such that this is now a bad idea. I'm now on UDMA2 for hda,c,d which works fine, nice 24MB/s or so off the hdc/d which are the big drives. hdb is still acting weird though: 21:28:05 0$ hdparm -d1 -X34 /dev/hdb /dev/hdb: setting using_dma to 1 (on) setting xfermode to 34 (multiword DMA mode2) using_dma =3D 1 (on) root@jimblewix:~; 21:28:45 0$ hdparm -i /dev/hdb /dev/hdb: Model=3DMaxtor 82560 A4 -, FwRev=3DAA8Z2225, SerialNo=3DC40AHFXA Config=3D{ Fixed } RawCHS=3D4962/16/63, TrkSize=3D0, SectSize=3D0, ECCbytes=3D20 BuffType=3DDualPortCache, BuffSize=3D256kB, MaxMultSect=3D16, MultSect=3D16 CurCHS=3D4962/16/63, CurSects=3D5001696, LBA=3Dyes, LBAsects=3D5001728 IORDY=3Don/off, tPIO=3D{min:120,w/IORDY:120}, tDMA=3D{min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4=20 DMA modes: mdma0 mdma1 mdma2=20 AdvancedPM=3Dno WriteCache=3Denabled Drive Supports : ATA/ATAPI-4 X3T13 1153D revision 7 : ATA-1 ATA-2 ATA-3=20 So, that's MDMA2 set, but hdparm -i doesn't show it (no * next to ANY DMA or PIO mode). Similar results for setting lower MDMA modes or any PIO mode. Nothing in dmesg after doing this. -Ath --=20 - Athanasius =3D Athanasius(at)miggy.org / http://www.miggy.org/ Finger athan(at)fysh.org for PGP key "And it's me who is my enemy. Me who beats me up. Me who makes the monsters. Me who strips my confidence." Paula Cole - ME --XsQoSWH+UP9D9v3l Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iEYEARECAAYFAj4TXfoACgkQzbc+I5XfxKeKpACglUdduLRov2vgcRkRIWqGCKmx USQAmwfmDNvr+M1GtXNl4zMZQni50dGe =vvZ0 -----END PGP SIGNATURE----- --XsQoSWH+UP9D9v3l-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/