Date: Wed, 12 Dec 2012 14:27:04 -0800 From: Alfred Perlstein <bright@mu.org> To: Adrian Chadd <adrian@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, Alfred Perlstein <alfred@freebsd.org>, src-committers@freebsd.org, John Baldwin <jhb@freebsd.org> Subject: Re: svn commit: r244112 - head/sys/kern Message-ID: <50C904B8.6000502@mu.org> In-Reply-To: <CAJ-Vmom8aivK7Z95%2BSwigReOTdn-OwXspK3pXO=0CVr1y1Unzg@mail.gmail.com> References: <201212110708.qBB78EWx025288@svn.freebsd.org> <201212121046.43706.jhb@freebsd.org> <CAJ-Vmo=U04GX%2BZyKuzXLwV%2BPpzU6_dm5BCmL=DWfsmhTVAR%2BsA@mail.gmail.com> <201212121658.49048.jhb@freebsd.org> <CAJ-Vmom8aivK7Z95%2BSwigReOTdn-OwXspK3pXO=0CVr1y1Unzg@mail.gmail.com>
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On 12/12/12 2:15 PM, Adrian Chadd wrote: > On 12 December 2012 13:58, John Baldwin <jhb@freebsd.org> wrote: > > >> (Note that the primary reason I know for people not running with INVARIANTS >> enabled is not that they don't want panics, but that they don't want the >> performance hit.) > Well, it would be nice to be able to enable invariants on some > shipping "debug" versions of images in order to gather more data > without crashing the kernel. Yes, two of my employers were more of "we want to get more debug metrics, we have the spare cycles, but we can't deal with superfluous panics". It also allows us "non-architects" to slip in a debug image when we have spare cpu without getting yelled at for "crashing the $foo". -Alfred
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