This uses the recently-added jemalloc(3) feature of setting the lg_chunk
tuning option to zero to request that memory be allocated in the smallest
chunks possible. Without this option, the default is to initally map 8MB,
and then the mlockall() call wires that entire allocation even though the
program only uses a few Kbytes of it at runtime.
PR: bin/173332
Approved by: cognet (mentor)
On machines with huge amount of swap and high IO activity,
watchdogd(8) may wait for a swap memory longer than timeout and
sometimes fires.
Approved by: kib (mentor)
MFC after: 1 week
I was considering committing all these patches one by one, but as
discussed with brooks@, there is no need to do this. If we ever
need/want to merge these changes back, it is still possible to do this
per application.
generic watchdoc(9) interface.
Make watchdogd(8) perform as watchdog(8) as well, and make it
possible to specify a check command to run, timeout and sleep
periods.
Update watchdog(4) to talk about the generic interface and add
new watchdog(8) page.
- Reordered #includes
- Only include <sys/types.h>, not it and <sys/cdefs.h>
o style.Makefile(5) fixes
- No SRCS= line when only one src file with same name as program
o Use warn()/errx() instead of fprintf()
- Integrated patch from Philippe Charnier <charnier@xp11.frmug.org>
Approved by: jeff (mentor)
This commit has two pieces. One half is the watchdog kernel code which lives
primarily in hardclock() in sys/kern/kern_clock.c. The other half is a userland
daemon which, when run, will keep the watchdog from firing while the userland
is intact and functioning.
Approved by: jeff (mentor)
