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Date: Sun, 14 Jun 2009 17:49:42 -0700
From: Sam Leffler <sam@freebsd.org>
Organization: FreeBSD Project
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To: Bruce Evans <brde@optusnet.com.au>
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org, Ed Schouten <ed@freebsd.org>
Subject: Re: svn commit: r194204 - in head/sys: amd64/conf i386/conf
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Bruce Evans wrote:
> On Sun, 14 Jun 2009, Sam Leffler wrote:
>
>>> Log:
>>>   Enable PRINTF_BUFR_SIZE on i386 and amd64 by default.
>>>
>>>   In the past there have been some reports of PRINTF_BUFR_SIZE not
>>>   functioning correctly. Instead of having garbled console messages, we
>>>   should just see whether the issues are still there and analyze them.
>>
>> When I suggested enabling this by default for SMP configurations I was
>> reminded it wasn't enabled because of potential stack overflow.
>
> Stack overflow shouldn't be a problem, since printf shouldn't be called
> recursively.  

You don't need recursion to overflow the stack.  I'd love to see someone 
properly lock printf/console output instead of kludges like 
PRINTF_BUFR_SIZE.

    Sam