Re: [Question] I doublt on spin_lock again.

[Zhang Le <robert@thizgroup.com>]

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liyu wrote:

| 1. I found these use spin_lock(&rq->lock) in set_user_nice(), but
| not disable interrput ( e.g.  when sys_nice() call it ),  if the
| one timer interrput come before we unlock the spin_lock, Shall we
| dead lock here?  Since the scheduler_tick() may try to hold the
| same lock.

set_user_nice() -> task_rq_lock -> local_irq_save()

|
| 2. # define __acquires(x)    __attribute__((context(0,1))) # define
| __releases(x)    __attribute__((context(1,0))) # define
| __acquire(x)    __context__(1) # define __release(x)
| __context__(-1)

info gcc

BTW, have you ever read "HOWTO do Linux kernel development" be Greg?
Do it, if you haven't

- --
Zhang Le, Robert
Linux Engineer/Trainer

ThizLinux Laboratory Limited
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