On Sun, Jun 10, 2018 at 08:20:58PM +0200, Fredrik Noring wrote: > The kexec system call seems to require that the vmlinuz loading address is > aligned to a page boundary. 4096 bytes is a fairly common page size, but > perhaps not the only possibility? Does kexec require additional alignments? Basically MIPS supports page sizes 4k, 8k, 16k, 32k, 64k. Not every system supports all page sizes. 4k is the safe bet while larger systems prefer 16k or 64k. Details are complicated. And of course with kexec the kexecing and the kexecuted kernels do not even have to have the same page size. It would appear that the userland code you were refering to in your 2nd email in https://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git/tree/kexec/kexec.c?id=HEAD#n343 might erroneously fail if pagesize on the kexecing kernel is larger than of the kernel being kexed. Ralf
