Volker Armin Hemmann schrieb: > On Mittwoch 18 November 2009, Alan McKinnon wrote: >> On Wednesday 18 November 2009 01:16:04 Stefan G. Weichinger wrote: >>> Volker Armin Hemmann schrieb: >>>> Namespaces - you don't need it? Kick 'em out. >>> hmm, interesting ... ;-) >>> >>> for sure I also want to decrapify my kernel-config ... >>> >>> To disable namespaces I would have to set CONFIG_EMBEDDED=y ... correct? >>> >>> This is rather counterintuitive to me, as my main workstation is far >>> from an embedded or small system (ok, not compared to the >>> 4096-cpu-clusters in http://xkcd.com/619/ , but compared to, for >>> example, my embedded ALIX-PC I use as fw/router/something ...). >>> >>> So you suggest I set CONFIG_EMBEDDED=y and in turn get several new >>> options/defaults to choose and get right or wrong ... ? >>> >>> ;-) >>> >>> I am quite sure to have at least *some* crap in my config as I tend to >>> always do something like >>> >>> zcat /proc/config.gz >> /usr/src/linux-new-shiny-version/.config >>> make oldconfig >>> >>> .... >>> >>> This gives me expected results and a "it boots OK" experience, getting >>> rid of unused crap is another issue, yes. >>> >>> I wonder which EMBEDDED options would help me ... >> Likely none of them. >> >> The embedded menu is the most counter-intuitive thing in the whole kernel >> config. It does not supply a list of things you may enable, instead it >> activates a menu that allows you to switch stuff OFF that is normally ON. >> >> The rationale is that embedded devices need to get by on a very slim kernel >> and with some magic trickery they can successfully disable some features >> that are usually considered perfectly normal for regular desktop use. >> >> For example: CONFIG_HOTPLUG. It's unthinkable to remove this for a desktop, >> but does your TomTom need it? Does a GPS even have hotplug facilities? How >> about ADSL router/modems? >> >> To disable namespace, enable embedded, leave everything on, and you will >> find you can now disable namespaces. >> > > you can disable: > - Enable 16-bit UID system calls > > - Sysctl syscall support > without negative impact on a desktop. Most of it is broken for years anyway. > > - Core dumps > are another feature that most people never use > > - Load all symbols for debugging/ksymoops > and > - Do an extra kallsyms pass > stuff you can deactivate if you don't plan to send crash reports. > > - Enable PC-Speaker support > oh hell - away with that one! Who needs beeps anyway?
whoops. I hadn't looked back at that thread for weeks, only found it now. Thanks for your replies ....
