Date: Mon, 26 Oct 1998 11:05:37 +1030 From: Greg Lehey <grog@lemis.com> To: Steve Friedrich <SteveFriedrich@Hot-Shot.com>, Geoffrey Robinson <geoffr@globalserve.net> Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Installing on a System with Too Much RAM Message-ID: <19981026110537.Z16609@freebie.lemis.com> In-Reply-To: <199810251512.KAA09650@laker.net>; from Steve Friedrich on Sun, Oct 25, 1998 at 10:11:21AM -0500 References: <199810251512.KAA09650@laker.net>
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On Sunday, 25 October 1998 at 10:11:21 -0500, Steve Friedrich wrote: > On Sat, 24 Oct 1998 14:45:16 -0400, Geoffrey Robinson wrote: > >> Steve Friedrich wrote: >>> >>> On Fri, 23 Oct 1998 17:30:03 -0400, Geoffrey Robinson wrote: >>> >>>> No, the panic occurs immediately after the kernel configuration menu. >>> >>> What message does the panic spit out? If there are multiple messages, >>> the first one is very important. >> >> >> This is the exact error message >> >> panic: bounce memory out of range >> Automatic reboot in 15 seconds - press a key on the console to abort > > The GENERIC kernel has: > > options BOUNCE_BUFFERS #include support for DMA bounce > buffers > > and LINT says: > > # BOUNCE_BUFFERS provides support for ISA DMA on machines with more > # than 16 megabytes of memory. It doesn't hurt on other machines. > # Some broken EISA and VLB hardware may need this, too. > > The way I read this, is that it should work by default. > > Anyone know about this buffer option?? Yes. I thought that the comment in LINT was pretty obvious, though. If you have an ISA DMA board and more than 16 MB of memory, you need bounce buffers. Some obscure drivers don't handle bounce buffers correctly. This isn't the problem that Geoffrey has, however: he doesn't have any ISA boards, so this should never happen. I'm still trying to think what to do about this: he has a rather interesting configuration (Dell PowerEdge 6300 with an unsupported RAID controller). Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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