From: "Russ Cox" <rsc@plan9.bell-labs.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] kprint
Date: Mon, 1 Oct 2001 11:31:47 -0400 [thread overview]
Message-ID: <20011001153149.AEFDC19AD2@mail.cse.psu.edu> (raw)
William is right on all counts.
I want to add:
o storage: do you have a circular buffer, or just accept an
ever-increasing buffer size ?
We use qnoblock(kprintoq, 1), which results in dropping
the tail of the log. It's an 8k log, so if someone is reading
I don't expect any drops.
o do you allow user processes to append messages themselves,
possibly a convenient place to put daemon log messages?
As Rob's man page excerpt pointed out, if you write to
#c/cons on a bitmapped terminal and /dev/kprint is open,
the output only goes to kprint. That seemed easier to explain
at the time. So syslog(1, ...) gets sent to kprint if in use.
Russ
next reply other threads:[~2001-10-01 15:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-01 15:31 Russ Cox [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-10-01 14:09 rog
2001-10-01 14:08 ` suspect
2001-10-01 14:16 ` William Josephson
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