* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > As it has been brought up last Kernel Summit, we want to make it easier > for those that report bugs to build their own kernels, and maybe even > bisect with git. Some of these people are not programmers and do not > understand the complexity of the configuration options. But to compile > a distribution configured kernel on their boxes can take hours. > > This patch series comes to the rescue. I wrote the first instance of > streamline config when I bought a new box in 2005 and got frustrated > with finding all the necessary configurations to boot it. It is a > small (yet powerful) perl script. > > Here's what it does: > > * Reads the modules that are load by using lsmod. > * Reads all Makefiles to map modules to CONFIG_* options > * Reads the Kconfig files to find dependencies and selects > * Figures out what CONFIGS are needed to compile the loaded modules > * Reads the .config and prints out a version with all module configurations > that not needed, disabled. > > The next two patches add options to make. > > localmodconfig - this will run streamline_config.pl on the .config file > and replace it at the end. > > localyesconfig - this will do the same as localmodconfig but will also > sed -i s/=m/=y/ to turn all modules to core. It will also run > the 'make oldcondfig' to fix it up and let the user handle > andything that was changed by converting a module to core. > > Anyway, this is now in git and as a series of patches here. My git > tree is based off of the latest Linus git tree. > > Have fun! Very nice and useful! I have given it a try - it works to a certain degree, but does not seem to work fully. If i boot a Fedora distro kernel with this module setup: aldebaran:~/linux/linux> lsmod Module Size Used by sunrpc 253904 1 ipv6 349568 50 cpufreq_ondemand 73248 0 acpi_cpufreq 75408 0 freq_table 70400 2 cpufreq_ondemand,acpi_cpufreq dm_multipath 82256 0 i2c_i801 75932 0 i2c_core 87192 1 i2c_i801 serio_raw 71556 0 pcspkr 68352 0 pata_jmicron 69504 0 iTCO_wdt 78208 0 shpchp 99160 0 iTCO_vendor_support 68868 1 iTCO_wdt igb 144412 0 dca 71976 1 igb pata_acpi 70528 0 ata_generic 71428 0 note the 'igb' driver that is essential to be picked up. 'make localyesconfig' complains: module igb did not have configs CONFIG_IGB But: # CONFIG_IGB is not set It did pick up other essential drivers - such as ext3. Why did it miss IGB? Here are all the missed drivers: aldebaran:~/linux/linux> make localyesconfig module ata_generic did not have configs CONFIG_ATA_GENERIC module iTCO_vendor_support did not have configs CONFIG_ITCO_WDT module shpchp did not have configs CONFIG_HOTPLUG_PCI_SHPC module acpi_cpufreq did not have configs CONFIG_IA64_ACPI_CPUFREQ CONFIG_X86_ACPI_CPUFREQ module pata_jmicron did not have configs CONFIG_PATA_JMICRON module i2c_i801 did not have configs CONFIG_I2C_I801 module serio_raw did not have configs CONFIG_SERIO_RAW module iTCO_wdt did not have configs CONFIG_ITCO_WDT module freq_table did not have configs CONFIG_CPU_FREQ_TABLE module igb did not have configs CONFIG_IGB module ipv6 did not have configs CONFIG_IPV6 module dca did not have configs CONFIG_DCA module sunrpc did not have configs CONFIG_SUNRPC module pata_acpi did not have configs CONFIG_PATA_ACPI module dm_multipath did not have configs CONFIG_DM_MULTIPATH module cpufreq_ondemand did not have configs CONFIG_CPU_FREQ_GOV_ONDEMAND module i2c_core did not have configs CONFIG_I2C module pcspkr did not have configs CONFIG_INPUT_PCSPKR Of those drivers, igb is the only truly boot-critical one - the box wont be very useful if it has no network support. Another comment: 'make localyesconfig' does not seem to be self-invariant. I.e. it does not handle the case well when we already have booted a localyesconfig kernel and do 'make localyesconfig' again. It will find no modules and will merrily create an almost empty .config. This could be addressed the following way: i think the script should implicitly turn on CONFIG_IKCONFIG=y, and should also check for the presence of /proc/config.gz and use it as a starting point. This makes the whole concept nicely self-invariant. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
