[gentoo-user] Changing system from single to dual CPU ?

[Joel Osburn]

I have an Opteron 242 system, to which I recently added a second processor and some more memory.  I figured that to take advantage of that processor, all I needed to do was recompile to kernel, reboot, and set "-j3" in the make.conf file.
 
However, there must be something else, since when I try to compile the kernel with smp, I get a whole bunch of errors like this when I run "make":
 
dandelion linux # make
  CHK     include/linux/version.h
  CHK     include/linux/compile.h
  CHK     usr/initramfs_list
  CC      arch/i386/kernel/process.o
In file included from include/asm/mpspec.h:5,
                 from include/asm/smp.h:18,
                 from include/linux/smp.h:19,
                 from include/linux/sched.h:26,
                 from arch/i386/kernel/process.c:18:
include/asm/mpspec_def.h:78: warning: 'packed' attribute ignored for field of type 'unsigned char[5u]'
  CC      arch/i386/kernel/semaphore.o
  CC      arch/i386/kernel/signal.o
In file included from include/asm/mpspec.h:5,
                 from include/asm/smp.h:18,
                 from include/linux/smp.h:19,
                 from include/linux/sched.h:26,
                 from arch/i386/kernel/signal.c:10:
include/asm/mpspec_def.h:78: warning: 'packed' attribute ignored for field of type 'unsigned char[5u]'
  AS      arch/i386/kernel/entry.o
  CC      arch/i386/kernel/traps.o
In file included from include/asm/mpspec.h:5,
                 from include/asm/smp.h:18,
                 from include/linux/smp.h:19,
                 from include/linux/sched.h:26,
                 from arch/i386/kernel/traps.c:15:
include/asm/mpspec_def.h:78: warning: 'packed' attribute ignored for field of type 'unsigned char[5u]'

<snip for brevity, the last one is:>

In file included from include/asm/mpspec.h:5,
                 from include/asm/smp.h:18,
                 from include/linux/smp.h:19,
                 from include/linux/sched.h:26,
                 from include/linux/module.h:10,
                 from fs/smbfs/smbfs.mod.c:1:
include/asm/mpspec_def.h:78: warning: 'packed' attribute ignored for field of type 'unsigned char[5u]'
  LD [M]  fs/smbfs/smbfs.ko

------------------

So no normal end to the compile.  This is with gentoo-sources 2.6.14-r5.  I can't upgrade that right now for other reasons. The system is compiled as an x86 system, not amd64, and the only change in kernel config is related to smp:
 
dandelion linux # grep -i smp .config
# CONFIG_X86_BIGSMP is not set
CONFIG_SMP=y
CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_SMP=y

Any ideas?
 
Joel T. Osburn



-- 
gentoo-user@g.o mailing list