Can I use the same .config file to compile 32-bit and 64-bit kernel?
Hi, I'm currently configuring a custom kernel on Fedora x86_64. The first option on the configuration menu is "64-bit kernel" which I think is the only option controlling the architecture of kernel. Copying this .config file to a 32-bit system directly and turning off this option, can I compile a 32-bit kernel which doesn't have any hidden problems? If this way is feasible, I think the only difference between these two kernels is architecture. Regards, Hao Lee
On Thu, Jul 6, 2017 at 11:02 AM, Hao Lee <haolee.swjtu@gmail.com> wrote:
Hi,
I'm currently configuring a custom kernel on Fedora x86_64. The first option on the configuration menu is "64-bit kernel" which I think is the only option controlling the architecture of kernel. Copying this .config file to a 32-bit system directly and turning off this option, can I compile a 32-bit kernel which doesn't have any hidden problems? If this way is feasible, I think the only difference between these two kernels is architecture.
Regards, Hao Lee
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Hi To the best I could recall, 32 vs 64 bit mainly affect vm split. in 32 bit, you have 3:1, in 64 bit, there is none and I am not sure that is automatically decided by Kconfig simply by selecting 32 or 64 bit arch. CMIIW -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
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