The dmesg here: http://dev.laptop.org/~cjb/656-dmesg Memory: 235016k/243700k available The dmesg here: http://dev.laptop.org/~cjb/rawhide-nand Memory: 199384k/230196k available Where did the extra memory go?
Some of it just "general purpose kernel, more is built-in". A lot more of it is likely to be that debugging is currently enabled. The F10 2.6.29 kernels being built in koji have it disabled and should be easy to see if they look more in line. If so, then after 2.6.29 final is out and we turn debug off, then it'll work itself out.
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle. Changing version to '11'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
This bug appears to have been reported against 'rawhide' during the Fedora 12 development cycle. Changing version to '12'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
This is still the case in build OS11 of F-11 for XO-1. The kernel is indeed being built with plenty of debug enabled, which also makes it slower. I might look at building a new kernel and report back.
I've built a kernel with most debug disabled, but we're still missing plenty of memory: Memory: 206964k/228180k available I will investigate further. Meanwhile, my streamlined kernel can be obtained from here: http://repo.paraguayeduca.org/xo1/i386/os/kernel-2.6.31_xo1-20100126.1446.1.olpc.c999f9c_DIRTY.i586.rpm
After shaving the kernel a little further: Memory: 298244k/228180k We're still missing plenty of memory, though. I'm starting to believe that something has changed at the detection level, or in Open Firmware. Ideas?
So far I couldn't find any more time to work on this. Meanwhile, I'm attaching the patch for the olpc-2.6 kernel streamlines the configuration. It's been tested for a while, should be safe to merge.
Created attachment 395613 [details] Drop some debug/exotic config options form the XO-1 kernel
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Can someone please confirm that the bug is still present with recent kernels?