Date: Sat, 21 Jun 2003 19:54:33 -0700 (PDT) From: Ian Dowse <iedowse@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern subr_prf.c tty.c tty_cons.c src/sys/sys tty.h Message-ID: <200306220254.h5M2sXxR099372@repoman.freebsd.org>
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iedowse 2003/06/21 19:54:33 PDT
FreeBSD src repository
Modified files:
sys/kern tty.c tty_cons.c subr_prf.c
sys/sys tty.h
Log:
Use a new message buffer `consmsgbuf' to forward messages to a
TIOCCONS console (e.g. xconsole) via a timeout routine instead of
calling into the tty code directly from printf(). This fixes a
number of cases where calling printf() at the wrong time (such as
with locks held) would cause a panic if xconsole is running.
The TIOCCONS message buffer is 8k in size by default, but this can
be changed with the kern.consmsgbuf_size sysctl. By default, messages
are checked for 5 times per second. The timer runs and the buffer
memory remains allocated only at times when a TIOCCONS console is
active.
Discussed on: freebsd-arch
Revision Changes Path
1.104 +13 -13 src/sys/kern/subr_prf.c
1.204 +3 -3 src/sys/kern/tty.c
1.112 +70 -0 src/sys/kern/tty_cons.c
1.72 +3 -0 src/sys/sys/tty.h
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