Jul 25th, 2013

Arranged power line and place for the IBM box, and got it seated :

Powered it on, looked good, then tried connecting it to the existing perceus/slurm environment. Surprisingly, it booted, all 48 cores were visible, but you can't have everything :

WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 32752MB of RAM.
------------[ cut here ]------------
WARNING: at arch/x86/kernel/cpu/mtrr/main.c:706 mtrr_trim_uncached_memory+0x114/0x17c()
Modules linked in:
Pid: 0, comm: swapper Not tainted 2.6.26.5-2.nsa1 #1

Call Trace:
 [<ffffffff80228a61>] warn_on_slowpath+0x51/0x8c
 [<ffffffff80430e64>] printk+0x4e/0x5a
 [<ffffffff80b647c7>] mtrr_trim_uncached_memory+0x114/0x17c
 [<ffffffff80b61e2f>] setup_arch+0x2a8/0x5cc
 [<ffffffff80b6edc9>] cgroup_init_early+0x208/0x21a
 [<ffffffff80b5ba36>] start_kernel+0x73/0x328
...

Loosing all 32 Gbytes of physical memory is not a happy occasion. New kernel needed for perceus. I'll be hating each and every minute of it. And there is this question about the disks and building the nvidia module.