kernel-2.6.12-r3 compilation crashing

[jbwillia]

I'm trying to build this kernel on a U60 2x450 512M .... Everytime I try, it begins compiling fine and it eventually does this:

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AS      arch/sparc64/kernel/head.o
arch/sparc64/kernel/dtlb_backend.S: Assembler messages:
arch/sparc64/kernel/dtlb_backend.S:157: Error: undefined symbol `_PAGE_SZ4M' in operation
make[1]: *** [arch/sparc64/kernel/head.o] Error 1
make: *** [arch/sparc64/kernel] Error 2

I've tried rebuilding gcc, glibc, and even binutils because I saw a reference to it somewhere when I tried to google this error. This has me completely baffled; I was getting the same error when I was trying it on 2.6.12-r3 as well. That's why I went ahead and resynced portage and got the newer r3 source. Has anyone seen this before?

I also looked at the code itself and I see where all the references come from, and everything is there like it should be as far as I can see. I just can't see why it will not compile...

[Weeve]

Adjust your kernel page size to something smaller. IIRC, when I first ran into this, I found that only 8KB and 64KB compiled correctly.

[jbwillia]

awesome thanks...I tried lower and lower until it worked. It was like you said: 64 k was the max, so I got past that point. However, it crashes out on me again when it tries to compile the DRM support for my creator3d with:

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  CC      drivers/char/drm/ffb_drv.o
drivers/char/drm/ffb_drv.c: In function `ffb_find_map':
drivers/char/drm/ffb_drv.c:151: error: structure has no member named `dev'
drivers/char/drm/ffb_drv.c: In function `postinit':
drivers/char/drm/ffb_drv.c:297: error: structure has no member named `minor'
drivers/char/drm/ffb_drv.c: At top level:
drivers/char/drm/ffb_drv.c:325: warning: `driver' defined but not used
make[3]: *** [drivers/char/drm/ffb_drv.o] Error 1
make[2]: *** [drivers/char/drm] Error 2
make[1]: *** [drivers/char] Error 2
make: *** [drivers] Error 2

For now I'll disable it and see if I can finish the compile. Is there some way to get this to compile?

[jbwillia]

OK, I got it compiled by leaving out DRM; however it is unbootable; it just spits at me:

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PER_CPU:Invalid layout, ptr[fffff800a0070000] shift[10] base[fffff8009f862000]
Program terminated
{0} ok

[cyan051]

same problem here...

kernel 2.6.13 = PER_CPU fault...
kernel 2.6.11 works just fine...

it seems that setup_per_cpu_areas in arch/sparc64/kernel/smc.p is a new function...and quite a buggy one...

this part of the code is responsible:

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        ptr = __alloc_bootmem(size * NR_CPUS, PAGE_SIZE,
                              (unsigned long) __per_cpu_start);
 
        __per_cpu_base = ptr - __per_cpu_start;
 
        if ((__per_cpu_shift < PAGE_SHIFT) ||
            (__per_cpu_base & ~PAGE_MASK) ||
            (__per_cpu_base != (((long) __per_cpu_base << 20) >> 20))) {
                prom_printf("PER_CPU: Invalid layout, "
                            "ptr[%p] shift[%lx] base[%lx]\n",
                            ptr, __per_cpu_shift, __per_cpu_base);
                prom_halt();
        }

apparently this code doesn't really work on sparc64 SMP systems...

i have couple of ideas on what to try - i'll update the post a bit later...

[UPDATE]:

it seems that the per_cpu memory allocation is not perfect...
so for now, simplest thing is to reduct page size:

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CONFIG_SPARC64_PAGE_SIZE_8KB