Red Hat Bugzilla – Bug 140354
/boot/config-2.6.9-1.667smp is missing CONFIG_4KSTACKS
Last modified: 2015-01-04 17:12:55 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040803 Description of problem: Correct me if I'm wrong, but the file /boot/config-2.6.9-1.667smp is supposed to be the kernel configuration file (.config) that was used to compile vmlinuz-2.6.9-1.667smp, which is the standard SMP Fedora Core 3 kernel. If that assumption is correct, then there's a bug in that file. The version magic for that kernel is "2.6.9-1.667smp SMP 686 REGPARM 4KSTACKS gcc-3.4". However, if I build a module using /boot/config-2.6.9-1.667smp as my .config file, the module's version magic is set to "2.6.9 SMP 686 REGPARM gcc-3.4". This is because there is no entry for CONFIG_4KSTACKS in config-2.6.9-1.667smp, and so during the kernel source configuration, that value gets set to "no". The resulting modules are compiled with 8K stacks. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. cd /usr/src/linux-2.6.9/ 2. make mrproper 3. cp /boot/config-2.6.9-1.667smp .config 4. make menuconfig (and then exit and save) 5. make prepare The kernel source tree is now configured 6. compile an external module using /usr/src/linux-2.6.9/ as the kernel tree. 7. Try to insmod the module. Actual Results: An error message like this is displayed: Nov 18 18:28:35 sqa-07 kernel: ccil: version magic '2.6.9 SMP 686 REGPARM gcc-3.4' should be '2.6.9-1.667smp SMP 686 REGPARM 4KSTACKS gcc-3.4' Expected Results: The module should have loaded without any complaints about the version magic. Additional info:
the config option is not present in the fedora kernel.
Then how come the kernel version magic has "4KSTACKS" in it? Look at the error message that insmod displayed: should be '2.6.9-1.667smp SMP 686 REGPARM 4KSTACKS gcc-3.4'
Please ignore my previous comment. /usr/src/linux-2.6.9/ should just not be used for compiling external modules, so any results from using it are meaningless.