plano

   1 intro
   2         linux
   3
   4 basics
   5         Makefile
   6         Kconfig DO?
   7         build
   8         init/exit
   9         printk
  10
  11 VFS
  12         center/hub/interface
  13         char/block/procfs/sysfs: all go through VFS to device
  14         FS on top of block devices
  15                 block layer
  16                 exception: some on top of MTD devices
  17
  18 device driver subsystem
  19         buses
  20         device classes
  21         interfaces
  22                 dev file
  23                 sysfs
  24                 procfs
  25                 sysctl DO?
  26                 netlink DO?
  27
  28 char device
  29 procfs
  30 sysfs
  31 block device DO? STUDY
  32 network device DO? STUDY
  33 terminal/serial device DO? STUDY
  34
  35 debugging techniques
  36         printk/procfs
  37         kgdb DO?
  38         trace DO?
  39         kprobe DO?
  40
  41 C basics
  42         container_of (struct embedding)
  43         fops/*ops (function pointers)
  44
  45 data structures
  46         list_head
  47         bitmap
  48         trees DO? STUDY rbtree
  49         idr DO?
  50         any hash implementation DO? STUDY
  51
  52 contexts
  53         user context (current, copy_from_user, schedule) STUDY schedule
  54         interrupt context
  55         workqueue is user context
  56         sleep == schedule
  57
  58 concurrency
  59         SMP systems
  60         locking
  61         spinlock: disable scheduler
  62         semaphore/mutex sleeps
  63         per-cpu variables STUDY
  64         atomic
  65         RCU DO?
  66
  67 memory allocation
  68         kobject refcount MENTION
  69         slab STUDY
  70                 multiple implementations
  71                 space efficient (tables for different object sizes)
  72                 concurrency efficient (per-cpu tables)
  73         kmalloc
  74                 uses slab STUDY
  75         vmalloc
  76                 linux memory layout
  77
  78 scheduling/timing
  79         schedule{,_timeout}
  80         timer
  81         workqueue
  82         completion/wait_head
  83         tasklets DO? STUDY
  84
  85 portability
  86         readl/writel/etc
  87         be16_to_cpu/etc
  88
  89 interrupt
  90         {request,free}_irq
  91         interrupt context
  92         tasklet/workqueue/postpone
  93
  94 buses
  95         PCI bus DO?
  96         USB bus DO?
  97         some bus: SPI, I2C, parport DO?
  98
  99 device classes
 100         some class: cdrom, backlight, input, misc DO?
 101
 102 kobject DO? advanced
 103         refcounting