On Tue, Dec 13, 2011 at 10:44 AM, loody <miloody@xxxxxxxxx> wrote: > hi all: > There is a kernel API, "schedule_timeout_interruptible". > since it has the name interruptible, who and how can we interrupt this task? > suppose A use schedule_timeout_interruptible for 20s period and B > found something and he want to wake up A within this 20s period. I think it's related to hardware interrupts, not other tasks. So a process waiting for a timer can be interrupted by a signal (there's a switch between process context and interrupt context). Take a look at schedule_timeout help page [0]. Notice the TASK_UNINTERRUPTIBLE and TASK_INTERRUPTIBLE sections. [0] http://kernel.org/doc/htmldocs/device-drivers/API-schedule-timeout.html -- Alexandru Juncu ROSEdu http://rosedu.org _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
