Messages in this thread |  | | | Date | Wed, 1 Dec 1999 15:03:53 +0000 | | From | Jens Axboe <> | | Subject | Re: Q: waiting for a short time and not beeing a resource hog |
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On Wed, Dec 01 1999, Andreas Schuldei wrote: > I want to wait for a short time in a driver after I got an interrupt that data > arrived. > > I do not like the > > while( (jiffies-time_start) < 1 ); > > since it is too long and blocks the whole cpu from doing sensible stuff. > > static void jiffy_sleep(u_int time) > { > current->state = TASK_INTERRUPTIBLE; > current->timeout = jiffies + time; > schedule(); > } > > Is this still applicable and racecondition-save?
Not in an interrupt context. Basically you can't sleep or schedule inside an interrupt handler. How long do you need to wait?
-- * Jens Axboe <axboe@image.dk> * Linux CD-ROM Maintainer * http://www.kernel.dk
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