> Gavin wrote:
>> On 07/07/07 18:55, Dennis Clarke wrote:
>> > after BFU of snv_68 :
>> >
>> > module /platform/i86pc/kernel//unix: text at [0xfe800000, 0xfe8d4a8b]
>> data at 0xfec00000
>> > module /kernel/genunix: text at [0xfe8d4a90, 0xfead88ff] data at
>> 0xfec4cdc0
>> >
>> > panic[cpu0]/thread=fec1f2e0: assertion failed: ((((l2cache_assoc ?
>> (l2cache_sz / l2cache_assoc) : 0x1000)) & (((l2cache_assoc ? (l2cache_sz
>> / l2cache_assoc) : 0x1000)) - 1)) == 0), file
>> >
>> > fec382d0 genunix:assfail+5a (fe8c936c, fe8c95ec,)
>> > fec38300 unix:page_coloring_init+35a (20000, 40, a)
>> > fec38358 unix:startup_memlist+3f5 (fec38384, fe954503,)
>> > fec38360 unix:startup+1c (fe800010, fec34128,)
>> > fec38384 genunix:main+5b ()
>>
>> That is this assert:
>>
>>          ASSERT(ISP2(CPUSETSIZE()));
>> checking that the number of distinct l2 sets is a power of 2:
>>
>> #define CPUSETSIZE()            \
>> (l2cache_assoc ? (l2cache_sz / l2cache_assoc) : MMU_PAGESIZE)
>> #define ISP2(x)         (((x) & ((x) - 1)) == 0)
>>
>> So could you boot under kmdb and at the time of panic
>> (when you drop to the debugger) utter:
>>
>> l2cache_assoc/D
>> l2cache_sz/X
>> l2cache_linesz/D
>
> Hmm, startup_memlist+3f5 passes these as parameters to page_coloring_init(),
> so if we trust the parameters shown in the stack backtrace, we have
>
>         pagecolor_memsz =
>             page_coloring_init(l2cache_sz, l2cache_linesz, l2cache_assoc);
>
>        fec38300 unix:page_coloring_init+35a (20000, 40, a)
>
> l2cache_sz == 0x20000,
> l2cache_linesz == 0x40,
> l2cache_assoc ==  0xa
>
> That should give us a CPUSETSIZE() of 0x20000 / 0xa == 0x3333,
> which is not a power of 2.

If I had realized that this experiment would produce data of some value I
would not have tossed out the whole thing so fast.  But .. I needed a
successful build ( which I did get ) and a successful BFU/ACR which I did
not.  So I installed snv_64a Developers Edition fresh and started over. 
That was another mistake because now I was building with Studio 12 as
opposed to Studio 11.  The build ran for 16 hours and then failed.

This is turning out to be a long week already with snv_68

Dennis
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