Kernel thread

Share kernel code space (Do not confuse with

Kernel-level thread)

• swapping out unused page frames

• disk cache flushing

• Kernel threads do not has
  User Space and
  Local Stack.

• Regular processes execute kernel functions only through system calls, but kernel thread executes a single specific kernel C function

Well-known kernel threads

• pdflush - flushes dirty buffers to disk to reclaim memory

• kapmd - advanced power management (APM) handling

• kswap - reclaims memory

• keventd

• ksoftirqd -
  softirq

• …