Re: Problems with AMD64 and 8 GB RAM?

From: Scott Long (scottl_at_samsco.org)
Date: 03/31/05

  • Next message: Ronald Klop: "Re: syscons options and memory use" 
    Date: Thu, 31 Mar 2005 00:23:35 -0700
To: Ganbold <ganbold@micom.mng.net>

    Ganbold wrote:
    > Hi,
    >
    > Since we are discussing AMD64 with 8GB RAM, I also would like to point my
    > problem.
    >
    > I'm still looking for possibility to run FreeBSD 5.3-STABLE with more
    > than 4GB RAM
    > on Dual amd64 2.2GHz machine (IBM @server 325) with ServeRAID 6M (ips
    > driver)).
    > Right now I'm using only 4GB RAM and this server is in production.
    >
    > #uname -an
    > FreeBSD publica.ub.mng.net 5.3-STABLE FreeBSD 5.3-STABLE #12: Mon Nov 22
    > 12:04:57 ULAT 2004
    > tsgan@publicc.ub.mng.net:/usr/obj/usr/src/sys/AMD amd64
    >
    > As Scott said a few months ago, problem is below:
    >
    > "The ips driver looks like it will fail under heavy load when more
    > than 4GB
    > of RAM is present. It tries to force busdma to not defer requests
    > when the
    > bounce page reserve is low, but that looks to be broken and
    > will result in corrupted commands."
    >
    > Are the ips driver and bus_dma problems fixed yet in STABLE tree?
    > Is it worth to try source update and see how it works? I'm afraid to do
    > so, since it is production server.
    >
    >

    Yes, I (hopefully) fixed the problems that I pointed out, and I also
    locked it and added crashdump support. It is reported to be stable and
    fast now, so you won't go wrong by updating. These changes are in both
    5-stable and 6-current.

    Scott
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  • Next message: Ronald Klop: "Re: syscons options and memory use"

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