Re: Switching Fedora to pae kernel by default?

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Kyle McMartin wrote:
Look, I'm sorry if I'm just not thinking big picture enough here, but
what exactly is the use case for a PAE kernel these days? The compat
code in x86_64 should be more than good enough for the apps that require
an i686 chroot.

It's certainly very good. I converted my i386 install to an x86_64 one, and the intermediate step of running the i386 userspace on x86_64 kernel worked well.

I just don't see the status quo as doing any real harm, as the only
generations of CPU that benefit are really P4 (which aren't worth the
electricity used to power them) or Core (One) Duo (which didn't exist
for a particularly long time...) Neither of which actually supported
more than 3GB of RAM on their northbridges except for the Xeon chipsets
anyway.

I have no idea what the installer and livecd do, but to me, it would
seem to be a waste of space to carry two sets of installable kernels on
the discs, when one would do. That said again, I'm suprised we aren't
installing i586 kernels by default... Odd.

I think the ideal solution here is to support x86_64 kernel, i686
userspace more actively.

I'm all in favor of pushing x86_64. But I think currently most installs are i386.

What, honestly, are the odds of someone with a bunch of P4 Xeons these
days with 32GB of ram running Fedora? Are there really enough of them
that it's worth caring? ;-)

Of course, take what I say with a grain of salt. I don't particularly
care at all, I'm just trying to play the pragmatist.

Another question is what's the perf penalty of going to PAE on a
2GB of ram machine versus the vanilla HIGHMEM4G config?

I'm guessing, pretty low.

The only argument I really buy into is the NX one, honestly...

What about a yum plugin that recommends a kernel that the user could
override? I'll poke at it this afternoon (hey, I've always wanted to
learn python...)

Users won't be running yum.  They're running that applet thing.

--
error compiling committee.c: too many arguments to function

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