On Thu, May 23, 2013 at 10:40:29AM +0200, Geert Uytterhoeven wrote: > On Thu, May 23, 2013 at 9:57 AM, Chen Gang <gang.c...@asianux.com> wrote: > > -config BUG > > - bool "BUG() support" if EXPERT > > - default y > > - help > > - Disabling this option eliminates support for BUG and WARN, > > reducing > > - the size of your kernel image and potentially quietly ignoring > > - numerous fatal conditions. You should only consider disabling > > this > > - option for embedded systems with no facilities for reporting > > errors. > > - Just say Y. > > ... It's about reducing memory size on devices where you can't show bug or > warning messages.
And turning off CONFIG_BUG causes lots of warning messages at compile time about functions which are returning nothing which shouldn't. The problem is: trying to fix that _will_ mean the result is a larger kernel than if you just do the usual arch-implemented thing of placing an defined faulting instruction at the BUG() site - which defeats the purpose of turning off CONFIG_BUG. Therefore, it's better that CONFIG_BUG always be y and we stop kidding ourselves that it's possible to turn this off and safely save space. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
