Date: Mon, 25 Jan 2010 12:05:51 +0000 (UTC) From: Attilio Rao <attilio@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src UPDATING src/share/man/man9 sleepqueue.9 src/sys/conf NOTES options src/sys/kern kern_clock.c subr_sleepqueue.c subr_turnstile.c src/sys/sys proc.h sleepqueue.h Message-ID: <201001251212.o0PCCRGP038766@repoman.freebsd.org>
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attilio 2010-01-25 12:05:51 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_8)
. UPDATING
share/man/man9 sleepqueue.9
sys/conf NOTES options
sys/kern kern_clock.c subr_sleepqueue.c
subr_turnstile.c
sys/sys proc.h sleepqueue.h
Log:
SVN rev 202966 on 2010-01-25 12:05:51Z by attilio
MFC r201879:
Introduce the new kernel thread called "deadlock resolver".
It is used in order to seek within the threads state and heuristically
understand if there is any deadlock happening.
In order to implement it, the sq_type in sleepqueues is mandatory and not
only compiled along with INVARIANTS option. Additively, a new sleepqueue
function, sleepq_type() is added, returning the type of the sleepqueue
linked to a wchan.
Three new sysctls are added in order to configure the thread:
debug.deadlkres.slptime_threshold
debug.deadlkres.blktime_threshold
debug.deadlkres.sleepfreq
rappresenting the thresholds for sleep and block time that will lead to
a deadlock matching (when exceeded), while the sleepfreq rappresents the
number of seconds between 2 consecutive thread runnings.
In order to enable the deadlock resolver thread recompile your kernel
with the option DEADLKRES.
Sponsored by: Sandvine Incorporated
Revision Changes Path
1.632.2.10 +5 -0 src/UPDATING
1.17.2.4 +10 -1 src/share/man/man9/sleepqueue.9
1.1553.2.7 +5 -0 src/sys/conf/NOTES
1.687.2.6 +1 -0 src/sys/conf/options
1.211.2.2 +121 -1 src/sys/kern/kern_clock.c
1.64.2.3 +25 -3 src/sys/kern/subr_sleepqueue.c
1.175.2.2 +2 -0 src/sys/kern/subr_turnstile.c
1.535.2.6 +1 -0 src/sys/sys/proc.h
1.17.2.3 +1 -0 src/sys/sys/sleepqueue.h
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