CVS commit: src/sys/dev/sysmon

["Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>]

Module Name:    src
Committed By:   hannken
Date:           Sat Mar 14 09:52:49 UTC 2015

Modified Files:
        src/sys/dev/sysmon: sysmon_envsys.c sysmon_envsys_events.c sysmonvar.h

Log Message:
Add a counter of busy events and stop enqueueing more work if a device is busy.
Protect this counter with a new short time lock "sme_work_mtx" and
keep "sme_mtx" as long time lock.

Removes a deadlock where an active event holds "sme_mtx", the callout
"sme_events_check" blocks on "sme_mtx" and callout processing stops.


To generate a diff of this commit:
cvs rdiff -u -r1.128 -r1.129 src/sys/dev/sysmon/sysmon_envsys.c
cvs rdiff -u -r1.113 -r1.114 src/sys/dev/sysmon/sysmon_envsys_events.c
cvs rdiff -u -r1.45 -r1.46 src/sys/dev/sysmon/sysmonvar.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.