控制Linux kernel啟動console的列印級別
阿新 • • 發佈:2019-02-02
注意:在系統啟動時,可以從bootloader中將CONFIG_CMDLINE引數傳遞給kernel。235 /* 236 * This should be approx 2 Bo*oMips to start (note initial shift), and will 237 * still work even if initially too large, it will just take slightly longer 238 */ 239 unsigned long loops_per_jiffy = (1<<12); 240 241 EXPORT_SYMBOL(loops_per_jiffy); 242 243 static int __init debug_kernel(char *str) 244 { 245 console_loglevel = 10; 246 return 0; 247 } 248 249 static int __init quiet_kernel(char *str) 250 { 251 console_loglevel = 4; 252 return 0; 253 } 254 255 early_param("debug", debug_kernel); 256 early_param("quiet", quiet_kernel); 257 258 static int __init loglevel(char *str) 259 { 260 get_option(&str, &console_loglevel); 261 return 0; 262 } 263 264 early_param("loglevel", loglevel);