Date: Thu, 5 May 2005 03:48:08 +0000 (UTC) From: Doug White <dwhite@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern tty.c Message-ID: <200505050348.j453m8aC010285@repoman.freebsd.org>
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dwhite 2005-05-05 03:48:08 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_5)
sys/kern tty.c
Log:
Commit a workaround to panics in ttwwakeup() during open and closes of the
terminal sharing /dev/console. Peek at tty structs passing through ttymalloc()
and pass them to ttyrel() if they'd get reaped due to the refcount dropping
to 0. Also loosen up the refcount check in ttyrel() to account for
refcounting problems caused by the incestuous relationship. I left the
KASSERT alone in case people want to look into the underlying issue.
Reaping dying tty structs helps keep stale data from growing in the knote
lists, which eventually get tripped over, causing the panic.
This change does not apply to -CURRENT due to differences in tty handling.
MFC after: 3 days
Revision Changes Path
1.228.2.4 +12 -2 src/sys/kern/tty.c
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