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Honored Contributor
Honored ContributorDevice tree corrupted
Hi all, I use a 3.2.0 kernel from Altera git on a nios2, I have no bootloader and an initramfs. the kernel is loaded directly from Flash using altera_nios2/boot_loader_cfi.srec The kernel ...
Altera_ForumHonored Contributor
Honored ContributorHi,
So after (a long) investigation I think I can explain what happens, but I don't know how to correct since it may come from the kernel sources (I'm not kernel developper). If I dump device-tree values before starting any application the device-tree (DT) is not corrupted. If I start an application that requires quite a lot of memory (such as net-snmp with V3 and encryption/authentication enabled) the device tree becomes corrupted. It seems that applications that requires quite a lot of memory are overwritting DT values. So I configure my GPIOs before DT corruption and everything works fine. But this is not really a solution. So I think that the DT area is not protected from a kernel point of vu, so the memory used by the DT is overwritten when kernel needs more memory. I don't know if the issue comes from the kernel itself or from uClinux stuffs. Does someone has any idea ? Best regards PS : the more strange behaviour is that with a 16MB RAM the DT needs more applications running to be corrupted, with a 32MB RAM the DT is corrupted after the first application launched?
