On Mar 13, 2008, at 5:10 AM, Stephen Clark wrote:
sysctl kern.ipc.shm_use_phys=1
Could you please explain what that does and why?
% sysctl -d kern.ipc.shm_use_phys
kern.ipc.shm_use_phys: Enable/Disable locking of shared memory pages
in core
Basically, this sysctl can force SysV shared memory regions to be
unpageable aka "locked down" or "wired down".
Also could someone point me to where all these sysctls are
documented other than in the source code - which lots of time has no
explanation. It would really help the average sys admin/ user if
these were documented.
"sysctl -ad" will show a one-line description for most of them. Not
all of these are intended for normal usage or tuning, however...some
reflect purely debugging interfaces which only do make sense in the
context of the associated source code.
--
-Chuck
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