dueling (s)printf()'s - what's the cure?

[Chris H.]

Quoting Jeremy Chadwick <koitsu at freebsd.org>:

> On Fri, Feb 01, 2008 at 06:31:11PM -0800, Chris H. wrote:
>> I mentioned a problem with this once before, and was referred to
>> other threads that also talked about this. But I believe a recent
>> problem I was experiencing, may have been related to this:
>> [: -le: argument expected. So I'd like to bring it up again, in
>> hopes that someone might have a cure. Specifically, two printf()'s
>> are sent to the same line, which results in a /very/ hard line to
>> decipher.
>
> The two problems you're discussing are entirely 100% unrelated to one
> another.  Please do not try and relate them, it will just confuse
> readers of both threads.

Good to know. relatedness stops here. :)

>
> The problem with [/test on your system is something that's specific to
> your system.  I'm hoping the reinstall you're doing (see private mail)
> will alleviate this, and if it doesn't, something you're doing after the
> fresh install is causing it.  That should be discussed in the other
> thread and not here.

Understood.

>
> The problem with kernel printf()s being interwoven is documented in my
> "common issues" file, with numerous threads referenced -- see "Scrambled
> dmesg/kernel output" here:
>
> http://jdc.parodius.com/freebsd/common_issues.txt

Yes, I read this already (thanks for sharing it when I originally
asked about this). But was hoping something had been done that
fixes this.

>
> There is no fix or workaround for this problem.  Someone mentioned
> increasing PRINTF_BUFR_SIZE to 128, which does not fix the problem,
> nor diminish it in any way.
>
> It's very important that people understand the interwoven kernel output
> is specific to stuff printed to the console at the kernel level (e.g. a
> driver/module, a piece of the kernel, etc.), and will not happen when
> doing something that's output via printf(3) from libc (e.g. output from
> "make buildworld", "yes", "ls -FRal /", and so on).

Good to know - even if it's not a cure. :)

Thank you Jeremy, for taking the time to provide such an informative
reply.

Best wishes.

--Chris H

>
> --
> | Jeremy Chadwick                                    jdc at parodius.com |
> | Parodius Networking                           http://www.parodius.com/ |
> | UNIX Systems Administrator                      Mountain View, CA, USA |
> | Making life hard for others since 1977.                  PGP: 4BD6C0CB |
>
> _______________________________________________
> freebsd-stable at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
>



-- 
panic: kernel trap (ignored)