Date: Sun, 24 Dec 2006 14:58:03 +0200 From: Erik Udo <erik.u@dnainternet.net> To: olivier@gautherot.net Cc: freebsd-hardware@freebsd.org Subject: Re: memory holes Message-ID: <458E795B.9020805@dnainternet.net> In-Reply-To: <200612240836.11747.ogautherot@vtr.net> References: <458D36E4.9000900@dnainternet.net> <458D67CC.1050102@dnainternet.net> <200612240836.11747.ogautherot@vtr.net>
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Yes, i got it working after having two memoy modules that match in bus speed. But, i was wondering how BIOS had 512MB of ram. Shouldn't the speed and stuff be invisible to the OS? Or did i have bad memory? Olivier Gautherot wrote: > Hi Erik! > > Mixing memory modules with different speeds is generally a dangerous thing to > do. I would strongly recommend you match them all. The fact that your 384MB > configuration worked is in no way a garantee that the 512MB config you > describe should work (I would even say that it is a miracle that it ever > worked in the first place). The problems you describe with the various *BSD > sound very much like soft errors - which may happen with out-of-spec bus > frequency. > > Merry Christmas > Olivier > > On Saturday 23 December 2006 14:30, Erik Udo wrote: >> OK. I've tested OpenBSD and NetBSD. >> >> Both find 512MB of ram, but.. >> NetBSD crashes after boot stage when it starts to load the kernel. >> (thanks NetBSD team for not building the kernel image with debugging >> symbols, but you did build it with DDB) >> >> OpenBSD finds 512MB of ram too, but... >> it wont find my hard disk, even thought it has wd0 as a hard disk in dmesh. >> >> To add to my previous post, i tested with 128MB PC100 + 32MB PC100. Both >> memory modules was found by FreeBSD and put to use. >> >> Which leads me to the conclusion: Why can't FreeBSD use PC133 memory >> when OpenBSD can? Did someone forget to port drivers for memory modules? :P >> >> Erik Udo wrote: >>> I upgraded my hardware and software yesturday, and for some reason, >>> FreeBSD only 'detects' 128MB of the memory, when the BIOS is clearly >>> seeing 512MB. OpenBSD also finds 512MB of memory. >>> >>> So i added one 128MB ECC memory. There was one 128MB PC100 and 256MB >>> PC133 memory before, and it worked fine on 6.2-PRERELASE. >>> >>> Now that i upgraded to 6.2-RC1, from 6.2-PRERELEASE and added the 128MB >>> memory to the 384MB i had, the kernel started giving me this error on >>> the first line of the kernel output: >>> "Too many holes in the physical address space, giving up" >>> >>> Now, i searched google for anything, and found this earlier thread: >>> http://www.mail-archive.com/freebsd-hardware@freebsd.org/msg01624.html >>> >>> I also found this: >>> http://lists.freebsd.org/pipermail/freebsd-hackers/2005-October/013932.ht >>> ml >>> >>> Like the previous post says, the memory was found after the increased >>> PHYSMAP_SIZE. I increased mine to 2*32, later 2*128. It didn't work. >>> >>> Also someone told me to add this line to the kernel config: >>> options MAXMEM=524288 >>> >>> That didn't work either. >>> >>> I also tried to toggle all the bios settings on the computer, i even >>> upgraded the bios. Nothing. >>> >>> Now i found out that OpenBSD sees 512MB of memory, so there must be some >>> kind of trick to make FreeBSD recognize that memory too. >>> >>> Here is some output of my verbose boot: >>> >>> with 512MB: >>> real memory = 134234112 (128 MB) >>> Physical memory chunk(s): >>> 0x0000000000001000 - 0x000000000009efff, 647168 bytes (158 pages) >>> 0x0000000000100000 - 0x00000000003fffff, 3145728 bytes (768 pages) >>> 0x0000000000c25000 - 0x0000000007d82fff, 118874112 bytes (29022 pages) >>> avail memory = 121798656 (116 MB) >>> >>> Anyone have any ideas? >>> >>> Thanks, >>> Erik >>> _______________________________________________ >>> freebsd-hardware@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-hardware >>> To unsubscribe, send any mail to >>> "freebsd-hardware-unsubscribe@freebsd.org" >> _______________________________________________ >> freebsd-hardware@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-hardware >> To unsubscribe, send any mail to "freebsd-hardware-unsubscribe@freebsd.org" >
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