PRINTF_BUFR_SIZE in freebsd6

[pluknet]

2008/12/17 Paul B. Mahol <onemda at gmail.com>:
> On 12/17/08, pluknet <pluknet at gmail.com> wrote:
>> 2008/12/17 pluknet <pluknet at gmail.com>:
>>> 2008/12/16 Kostik Belousov <kostikbel at gmail.com>:
>>>> On Tue, Dec 16, 2008 at 03:23:28PM +0300, pluknet wrote:
>>>>> Hi.
>>>>>
>>>>> Could the PRINTF_BUFR_SIZE option be safely merged into RELENG_6 without
>>>>> merging a possible underlining infrastructure and breaking something
>>>>> else?
>>>>> I want to use it in my custom freebsd6 because I see "interspersed
>>>>> strings
>>>>> written from different CPUs at the same time":
>>>>>
>>>>> uuusseseerrvmrem: vlmivmeimtme :e mx:ceed eldi bly 2i89m68m (iihttt t
>>>>> pde) eaxtx cfcorke1 22e3e
>>>>> deded ebyd  by28 296898 68(h t(tpdh) att ftorkp1 22d3
>>>>> ) at fork1 223
>>>>>
>>>>> I'm talking about only merging kern/subr_prf.c 1.126, 1.128, 1.129.
>>>>>
>>>>> Thanks.
>>>>
>>>> I did a backport of the option some time ago, see
>>>> http://people.freebsd.org/~kib/misc/releng_6_printf_bufr.3.patch
>>>>
>>>
>>> Thank you!
>>>
>>> 6.3 system panics (many page faults, one after another) early at boot
>>> without the option, and boots with it in the QEMU environment.
>>> Next step to test it on a real (and SMPable) hardware.
>>>
>>
>> Now tested on a real 2xXeon 3.0 w/ HTT enabled w/ PRINTF_BUFR_SIZE enabled.
>>
>> Received the following panic:
>
> And how big is PRINTF_BUFR_SIZE ?

Hi.

I set options PRINTF_BUFR_SIZE=128

And maybe it's not enough (?) because I stress-tested server triggering
to appear many kernel messages simultaneously.
I don't know coherence between buffer size and this panic though.

>
> --
> Paul
>