Date: Fri, 07 Sep 2001 00:06:02 +0200 (CEST) From: Salvo Bartolotta <bartequi@neomedia.it> To: Mike Meyer <mwm@mired.org> Cc: Mike Meyer <mwm@mired.org>, Ceri <ceri@techsupport.co.uk>, questions@freebsd.org Subject: Re: Good practice for /tmp Message-ID: <999813962.3b97f34a33366@webmail.neomedia.it> In-Reply-To: <15255.61590.455896.440737@guru.mired.org> References: <999807502.3b97da0e9af9f@webmail.neomedia.it> <15255.61590.455896.440737@guru.mired.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Scrive Mike Meyer <mwm@mired.org>: > Salvo Bartolotta <bartequi@neomedia.it> types: > > > An mfs is supposedly backed by swap. So if swap is on mfs, what's > > > backing the mfs? Is the inverse of the dual the dual of the > inverse? > > > Where's the tylenol? > > Hmm, the dual of a dual is isomorphic to the original space. :-) > > But the dual of a graph may not be a graph. > > > > Anyway, I agree with you. Putting swap on mfs or md seems sort of > > > pointless. If the goal is to prevent people from reading sensitive > > > information left on swap if the hardware is compromised - which is > > > something security people do worry about - just configure the > system > > > without any swap. > > I am probably missing something here. I seem to understand that even > systems > > with a *large* amount of RAM [occasionally] make use of swap; in other > words, > > the OS seems to be tuned to utilize swap, regardless of the amount of > RAM > > present on the machine. > > While it's certainly correct that the system runs better with swap - a > minimum of 256MB is recommended by tuning(7) - that doesn't mean it > absolutely has to have any swap at all. > > > Enlightenment welcome :-) > > During the install process, the system clearly runs without swap - > which is one of the reasons you have to have more memory to install > FreeBSD than you do to use it. The comments in LINT about the > NO_SWAPPING option indicate that it's expected that a system can run > that way. > > If you believe pstat -s, I just booted and ran a system sans swap by > the simple expedient bring it up single user, removing the swap > partition from /etc/fstab, and then going multi-user. No problems - > but I was careful not to do anything that would use lots of memory. > > <mike > -- > Mike Meyer <mwm@mired.org> http://www.mired.org/home/mwm/ > Independent WWW/Perforce/FreeBSD/Unix consultant, email for more > information. > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?999813962.3b97f34a33366>