I have a process which does mmap into a kernel driver to map DMA packet memory into user space. When the process crashes want this memory to be part of coredump for post crash analysis.
As well documented VM_IO flag for this vma prevents it. Is always_dump_vma() calling vma->vm_ops "name" function pointer return non-NULL a workaround/solution ? When trying this by setting vma->vm_ops name function pointer returning non-NULL, VMA is filled with all zeroes in coredump because get_dump_page() is returning NULL for VM_IO flag set vmas. Previously saw a thread w.r.t framebuffer device having similar requirement, but I see VM_ALWAYSDUMP added and removed from linux kernel. What is the current way to achieve this functionality if at all its possible ? Kartikeyan
