cvs commit: src/sys/kern kern_malloc.c src/sys/sys malloc.h src/sys/vm memguard.c memguard.h

John Baldwin jhb at
Fri Dec 30 05:29:52 PST 2005

On Friday 30 December 2005 06:45 am, Pawel Jakub Dawidek wrote:
> pjd         2005-12-30 11:45:07 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/kern             kern_malloc.c
>     sys/sys              malloc.h
>     sys/vm               memguard.c memguard.h
>   Log:
>   Improve memguard a bit:
>   - Provide tunable vm.memguard.desc, so one can specify memory type
> without changing the code and recompiling the kernel.
>   - Allow to use memguard for kernel modules by providing sysctl
>     vm.memguard.desc, which can be changed to short description of memory
>     type before module is loaded.

You don't actually need a sysctl for this case.  You can use kenv to set a 
tunable after boot but before loading the module to achieve the same purpose.  
E.g.  'kenv vm.memguard.desc=FOO' will work and TUNABLE_FETCH will find it 
during a subsequent kldload.  Just FYI.

John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve"  =

More information about the cvs-src mailing list