Date: Sat, 2 May 1998 22:40:02 -0700 (PDT) From: Matthew Dillon <dillon@backplane.com> To: freebsd-bugs@FreeBSD.ORG Subject: Re: i386/5398 Message-ID: <199805030540.WAA22835@freefall.freebsd.org>
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The following reply was made to PR i386/5398; it has been noted by GNATS.
From: Matthew Dillon <dillon@backplane.com>
To: Poul-Henning Kamp <phk@critter.freebsd.dk>
Cc: John-Mark Gurney <gurney_j@efn.org>, freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: i386/5398
Date: Sat, 2 May 1998 22:34:59 -0700 (PDT)
Look guys, I'm not going to argue... I have worse things to worry about
then a bug report relating to a digital camera interface. But I am
extremely disappointed that you are taking such a cavalier attitude
towards it and making assumptions that, in my view, make little or no
sense just to close out the report. I'm not an idiot... I've been
writing operating systems and doing digital hardware design for over
15 years, so don't fraggin quote databooks at me and expect to get
away with it.
There's only one way to solve this problem and, unfortunately, I don't
have time to do it... and that is to add debugging code to the kernel
to do a histogram of the PC of the pushed context at the beginning of the
core interrupt code to see which diasble/enable pair is causing the
greatest number of latency problems. But, as I said, I don't have the
time to do it myself.
At the very least, don't close bug reports that I spent hours
putting together on an 'assumption'. It's annoying and insulting.
It is also annoying and insulting to start quoting missing hardware
configurations at me... you know damn well that if every bug report
had the hardware configuration detail down to the last transistor they
would be mostly useless bug reports because the FreeBSD crew would be
spending more time trying to sift through the garbage to locate the
meat. This bug report was pretty straight forward. The PCI bus may not
be the quickest thing in the world, but 8 microseconds times 8 character
slots is still a hellofalong time to start blaming it for interrupt
latencies that cause a serial FIFO to overflow.
-Matt
:Poul-Henning Kamp FreeBSD coreteam member
:phk@FreeBSD.ORG "Real hackers run -current on their laptop."
:"ttyv0" -- What UNIX calls a $20K state-of-the-art, 3D, hi-res color terminal
:
Matthew Dillon Engineering, BEST Internet Communications, Inc.
<dillon@backplane.com>
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