Date: Fri, 30 Dec 2005 14:42:15 +0100 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: John Baldwin <jhb@freebsd.org> Cc: cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/kern kern_malloc.c src/sys/sys malloc.h src/sys/vm memguard.c memguard.h Message-ID: <20051230134215.GE779@garage.freebsd.pl> In-Reply-To: <200512300815.57417.jhb@freebsd.org> References: <200512301145.jBUBj7fW043290@repoman.freebsd.org> <200512300815.57417.jhb@freebsd.org>
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[-- Attachment #1 --] On Fri, Dec 30, 2005 at 08:15:56AM -0500, John Baldwin wrote: +> 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. But I need to control vm.memguard.desc change to be able to detect if memory type has allocated memory already, etc. and eventually deny the change. AFAIK it won't be possible with kenv. -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDtTk3ForvXbEpPzQRAjOeAJ0QbOk9yp82d/Ct9J5TzDfy93IjlACgt0nS DbcryuBLrK+Mhc8Vw5vZPzQ= =f3cA -----END PGP SIGNATURE-----
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