Date: Fri, 21 Dec 2001 18:46:52 +0100 (CET) From: "Kristian K. Nielsen" <jkkn@jkkn.dk> To: <dillon@apollo.backplane.com> Cc: <bradym@mail.hydrologue.com>, <peter.jeremy@alcatel.com.au>, <davidc@acns.ab.ca>, <rnyberg@it.su.se>, <david@catwhisker.org>, <freebsd-stable@FreeBSD.ORG> Subject: Re: 4.4-STABLE crashes - suspects new ata-driver over wd-drivers Message-ID: <29650.193.88.88.10.1008956812.squirrel@webmail.jkkn.net> In-Reply-To: <200112202333.fBKNXZ679605@apollo.backplane.com> References: <200112202333.fBKNXZ679605@apollo.backplane.com>
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Just my ten cents... I have already tried to disable DMA, even in the BIOS and thereby forcing PIO mode.... no difference in my case - it still crashes.. /Kristian > :I'd had that thought as well. Seems a reasonably way for a misbehaving > :driver to corrupt memory. I'll try that tonight. > : > :However, being a recent convert to BSD, I don't know how to turn of > :DMA. How do I? > : > :-- > : Brady Montz > : bradym@balestra.org > > Do a 'man ata', there is a section on how to use sysctl to change > the mode. > > I'm going to attempt to duplicate your tests on a SCSI box. I did > do a ktrace of portsdb and it appears to use the read() system call > to read the Makefile's. The only time 'pre-patch' shows up is in > medium-sized read() calls (574 bytes, 768 bytes, etc...). Again, > nothing out of the ordinary. > > It does do a lot of fork/exec's to run /bin/sh, objformat, test, and > other programs. Beyond that, nothing out of the ordinary. > > -Matt > Matthew Dillon > <dillon@backplane.com> > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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