Messages in this thread | | | Date | Wed, 23 Nov 2005 10:51:22 +0800 | From | Zhang Le <> | Subject | Re: [Question] I doublt on spin_lock again. |
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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, Hunghom Commercial Centre, 37 Ma Tau Wai Road, To Kwa Wan, Kowloon, Hong Kong Telephone: (852) 2735 2725 Mobile:(852) 9845 4336 Fax: (852) 2111 0702 URL: http://www.thizgroup.com Public key: gpg --keyserver pgp.mit.edu --recv-keys 1E4E2973
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