Hi, Who passes the address to do_page_fault() in arch/ppc/mm/fault.c ? I know that its in the DAR register for ppc ( cr2 in x86) but who puts it there? My question will be sane if you read the problem im facing ... I'm using a test prog which just calls malloc(). For debugging purpose i've put the foll in arch/ppc/mm/fault.c : printk("\nerror : vm_start = 0x%08x vm_end = 0x%08x Address = 0x%08x\n ",vma->vm_start,vma->vm_end,address); Now when i run the test program i get the foll : vm_start = 0x10011000 vm_end = 0x10219000 Address = 0x101e9000 vm_start = 0x10011000 vm_end = 0x10219000 Address = 0x101ea000 vm_start = 0x10011000 vm_end = 0x10219000 Address = 0x101eb000 vm_start = 0x10000000 vm_end = 0x10001000 Address = 0x00000024 Oops: kernel access of bad area, sig: 11 < ... more dump ....> Where does the address 0x00000024 comes from?? Is this a cache/tlb problem? Thanks in advance. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/