Messages in this thread | | | Date | Wed, 3 Oct 2012 17:18:56 +0530 | Subject | DEBUG_STACKOVERFLOW issue on ARM | From | trisha yad <> |
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Dear All, In kernel 3.0.X we find "Check for stackoverflow" (CONFIG_DEBUG_STACKOVERFLOW) implementation for following architecture: frv, mn10300, m32r, tile, x86, mips, powerpc, blackfin except ARM.
Therefore we implemented the similar functionality for ARM in asm_do_IRQ(); We have tested it using a test module.ko that allocate memory on kernel stack.
This test code work fine on single core, but fail to detect stack overflow in multi-core ARM. While debugging we found that interrupts were occurring only in CPU0, while the test module was running in CPU1, since the kernel stack of CPU0 is unaffected by CPU1 kernel stack, it fails to detect the problem.
However when I upgraded the kernel from 3.0 to 3.4, the stack overflow detection started working.
I wish to know how can I support this function in 3.0 ?
Regards
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