Date: Sun, 25 Mar 2001 10:39:04 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: Dave Tweten <tweten@nas.nasa.gov> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: 4.3-RC Kernel Buffer Corruption (Was: 4.3-BETA makeworld of current STABLE Fails) Message-ID: <200103251839.f2PId4a11454@earth.backplane.com> References: <200103250309.f2P392654933@gilmore.nas.nasa.gov>
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I need the 'dmesg' output from both the Feb16 kernel and a broken
kernel. I suspect the ATA/IDE DMA is broken.
Also, make sure you aren't running any kld's. Run 'kldstat', it
should only show the kernel and nothing else.
Finally, I would like you to try the following patch. It disables
some ATA/DMA code that was added on Feb 25.
-Matt
Index: dev/ata/ata-dma.c
===================================================================
RCS file: /home/ncvs/src/sys/dev/ata/ata-dma.c,v
retrieving revision 1.35.2.9
diff -u -r1.35.2.9 ata-dma.c
--- dev/ata/ata-dma.c 2001/02/25 21:35:20 1.35.2.9
+++ dev/ata/ata-dma.c 2001/03/25 18:38:01
@@ -353,7 +353,7 @@
goto via_82c586;
case 0x05711106: /* VIA 82C571, 82C586, 82C596, 82C686 */
- if (ata_find_dev(parent, 0x06861106, 0x40)) { /* 82C686b */
+ if (0 && ata_find_dev(parent, 0x06861106, 0x40)) { /* 82C686b */
if (udmamode >= 5) {
error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
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