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    SubjectRe: -aa 3.5GB Patch Questions
    Just a sanity check, are you using the
    current (errata) red hat gcc?

    Just asking since 2.96 is all I use, and
    the -aa kernels are completely stable
    here - do you have a test workload to
    allow me to try and duplicate your bug?


    Mitch Sako wrote:

    >I've been using Andrea's 2.4.18rc4aa1 patches applied to a generic
    >2.4.18 kernel running on Intel 32-bit machines with 4GB of memory and
    >usually some sort of Serversorks chipset with 1-2 CPUs of various speeds
    >with great success for almost 6 months now. The primary base has been a
    >SuSE 7.2 distro but others are now being tried, including Slackware 8.1
    >and RH 7.[23]. The principal reason for this was to use the
    >00_3.5G-address-space-4 feature. I apply all patches in the directory
    >and have not seen a kernel failure yet with thousands of hours of "big
    >process" CPU time logged across many machines. I consider this to be a
    >pretty stable combination of kernel and patches for what I need.
    >RH's 2.96 gcc compiles fine but blows up or slows to a crawl (not
    >unexpected) when big jobs are run and the machine starts paging. I've
    >fixed this by putting a 2.95.3 gcc on the machine. I'll leave the
    >editorial comments about 2.96-RH to others.
    >I'm trying to write some sanitized procedures which will allow me to
    >pass this on to others. Non-2.96 distros (everyone except RH and
    >Mandrake, AFAIK) have run fine without issues, mainly because they have
    >a pretty stable 2.95 compiler included.
    >I will assume that a gcc 2.95 retrofit is required to make the -aa
    >patches work on RH 7.[23].
    >What's the correct way to retrofit a 2.95.3 compiler onto an RH 7.[23]
    >Is it OK to just load it into /usr/local and build it?
    >Does it require 'make bootstrap' to be entirely santized?
    >Are there other GNU packages that I should be including with the gcc
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