Red Hat Bugzilla – Bug 101971
RFE: Allow for easier to perform downgrade ix86 installs
Last modified: 2008-08-02 19:40:33 EDT
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Description of problem:
What exactly do i think is a good idea?
Perhaps having the ability to select a lessor compatible arch when installing on
a machine...example being able to select i586 install when installing on an
i686 machine...maybe a kernel boot parameter
Why on earth would I think thats a good idea?
The minimum memory requirement to do a a red hat linux install seems to me much
higher than the minimum memory of using red hat linux for some dedicated
purposes. I find when I'm installing on old hardware, for dedicated tasked
machine, I can't actually install a minimal rhl9 install on that hardware. I
have to install rh9 using a beefier machine then move the harddrive over.
Normally that beefier machine is also a higher ix86 processor arch...so i end up
having to downgrade things like the kernel rpm by hand before switching the
harddrive back to the box its suppose to be on. Being able to select i586 when
i'm installing on an athlon, would make it marginally easier for me to swap that
harddrive back into the old box without issue.
But I do grant you this is of small marginal benifit in my specific situation,
so I won't be too hurt if its not worth the effort to implement. But maybe there
are other situations where this type of install option fits.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Added in cvs. Add "rpmarch=i586" to your kernel command line (or similar).
Note that this will allow you to completely shoot yourself in the foot if you do
something like "rpmarch=sparc"
this function almost works in later versions. here is a patch for rhel4 that
makes it work again:
--- iutil.py 2002-12-16 16:52:35.000000000 -0800
+++ /home/updates/centos/4/dist/RHupdates/iutil.py 2005-04-22
@@ -661,11 +661,14 @@
f = open("/proc/cmdline", "r")
buf = f.read()
- args = buf.split(" ")
+ args = buf.split()
for arg in args:
myarch = arg[8:]
+ # now make the current install believe it, too
+ rhpl.arch.canonArch = myarch
f = open("%s/etc/rpm/platform" %(root,), 'w+')
Red Hat apologizes that these issues have not been resolved yet. We do want to
make sure that no important bugs slip through the cracks.
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They are maintained by the Fedora Legacy project (http://www.fedoralegacy.org/)
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If this is not a security issue, please check if this issue is still present
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Fedora Legacy security update support for these products will stop on December
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Any bug still open against Red Hat Linux 7.3 or 9 at the end of 2006 will be
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