Ubuntu got stuck on boot after kernel compilation

Bishal Kumar Nath · 03-09-2020, 02:12 AM

I tried to modify the slab.h ("/include/linux/slab.h") header file by adding a new function as follows-

static inline void newfoo(void)
{
printk("something");
}

The kernel compiled successfully. Everything was successful. But while booting into the new kernel image, it gets stuck on boot every time. (I have tried to add function in other files also, but the result is same).

(P.S- while compiling i gave a warning something like page size exceeds 1036). Kindly point my mistake... Thank you

TB0ne · 03-09-2020, 07:00 AM

Quote:

Originally Posted by Bishal Kumar Nath

I tried to modify the slab.h ("/include/linux/slab.h") header file by adding a new function as follows-

Code:

static inline void newfoo(void)
{
   printk("something");
}

The kernel compiled successfully. Everything was successful. But while booting into the new kernel image, it gets stuck on boot every time. (I have tried to add function in other files also, but the result is same).

(P.S- while compiling i gave a warning something like page size exceeds 1036). Kindly point my mistake... Thank you

Ok; your mistake was putting that in where you did, obviously. Since having that in there causes the kernel to not only give you compilation warnings/problems, but causes the kernel to not boot. Remove that code and recompile.

berndbausch · 03-09-2020, 07:28 AM

Quote:

Originally Posted by Bishal Kumar Nath

(P.S- while compiling i gave a warning something like page size exceeds 1036). Kindly point my mistake... Thank you

When compiling kernels, pay more attention to error or warning messages. Errors and warnings are invaluable troubleshooting elements. Don't consider it a "PS", don't report "something like...", but report the precise, complete message with some context.