Zhang Le wrote:
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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
Address: Unit 1004, 10/F, Tower B,
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Thanks first.
1. I know local_irq_save() in task_rq_lock(), but it only save FLAGS
register to one unsigned long variable, but not disable maskable interrupt.
2. OK, I am going to get it.
-liyu
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