Date: Wed, 20 Jun 2018 19:23:56 +0000 (UTC) From: Kyle Evans <kevans@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r335458 - head/sys/kern Message-ID: <201806201923.w5KJNuvO053506@repo.freebsd.org>
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Author: kevans Date: Wed Jun 20 19:23:56 2018 New Revision: 335458 URL: https://svnweb.freebsd.org/changeset/base/335458 Log: Add debug.verbose_sysinit tunable for VERBOSE_SYSINIT VERBOSE_SYSINIT is currently an all-or-nothing option. debug.verbose_sysinit adds an option to have the code compiled in but quiet by default so that getting this information from a device in the field doesn't necessarily require distributing a recompiled kernel. Its default is VERBOSE_SYSINIT's value as defined in the kernconf. As such, the default behavior for simply omitting or including this option is unchanged. MFC after: 1 week Modified: head/sys/kern/init_main.c Modified: head/sys/kern/init_main.c ============================================================================== --- head/sys/kern/init_main.c Wed Jun 20 19:22:33 2018 (r335457) +++ head/sys/kern/init_main.c Wed Jun 20 19:23:56 2018 (r335458) @@ -119,6 +119,18 @@ int bootverbose = BOOTVERBOSE; SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, "Control the output of verbose kernel messages"); +#ifdef VERBOSE_SYSINIT +/* + * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to + * dictate the default VERBOSE_SYSINIT behavior. Significant values for this + * option and associated tunable are: + * - 0, 'compiled in but silent by default' + * - 1, 'compiled in but verbose by default' (default) + */ +int verbose_sysinit = VERBOSE_SYSINIT; +TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit); +#endif + #ifdef INVARIANTS FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); #endif @@ -268,7 +280,7 @@ restart: continue; #if defined(VERBOSE_SYSINIT) - if ((*sipp)->subsystem > last) { + if ((*sipp)->subsystem > last && verbose_sysinit != 0) { verbose = 1; last = (*sipp)->subsystem; printf("subsystem %x\n", last);
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