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Bug#383350: marked as done (base-installer: support selection of 686-bigmem kernel if >3GB RAM)

Your message dated Sat, 02 Dec 2006 13:18:03 +0100
with message-id <200612021318.13682.elendil@planet.nl>
and subject line Bug#383350: base-installer: support selection of 686-bigmem kernel if >3GB RAM
has caused the attached Bug report to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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Package: base-installer
Severity: wishlist

It would be nice if the installer would automatically select the new 
686-bigmem flavor for systems with more than 3GB internal memory.

The 3GB limit was suggested by Frederik Schueler.

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Turns out this is not really feasible.

[13:04:02] <fjp> waldi: From which RAM size is -bigmem useful? fs 
suggested 3GB a while back.
[13:05:56] <waldi> 3.5
[13:06:50] <fjp> Does that mean > 3500000 kB in /proc/meminfo?
[13:09:32] <waldi> no
[13:10:01] <fjp> Then what?
[13:10:29] <fjp> (For MemTotal: line of course.)
[13:11:17] <waldi> it means more than about 3.5GiB of memory as known by 
the bios, I don't think the kernel is able to show this
[13:12:29] <fjp> Ah, because you need the -bigmem kernel before the kernel 
knows about the extra? Hmm.
[13:12:51] <fjp> So, what is the largest size a normal 686 kernel will 
[13:13:08] <waldi> dunno
[13:14:13] <waldi> i think it is something between 3.3 and 3.5 GiB, 
depending on the bios and reserved io address space
[13:14:30] <fjp> Then using a (somewhat arbitrary) limit of 3GB would 
maybe make sense? I'd guess that having a -bigmem installed for that 
won't do any harm?
[13:14:37] <waldi> no
[13:14:42] <waldi> it is about 30% slower
[13:15:14] <fjp> That's significant. OK. /me scratches -bigmem support in 
[13:16:06] <waldi> you want to use 64bit kernels if ever possible instead

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