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On 9/14/05, Robert Hancock <hancockr@shaw.ca> wrote: > manomugdha biswas wrote: > > Hi, > > I have a kernel module (kernel 2.6) where I have > > opened multiple tcp connections. when there is no > > data > > i want my process to sleep. For that i have added > > the > > following code. > > > > /* Initialise the wait q head */ > > init_waitqueue_head(&VNICClientWQHead); > > > > init_waitqueue_entry(&(currentMap->waitQ), current); > > add_wait_queue(currentMap->sock->sk->sk_sleep, > > &(currentMap->waitQ)); > > > > /* here currentMap is a structure containing tcp > > conenction info for my module. There is a currentMap > > for each tcp connection */ > > > > wait_event_interruptible_timeout(VNICClientWQHead, > > 0, HZ * 100000); > > > > I am not sure about the condition argument, 0. > > The condition should be an expression that returns true when whatever > you are waiting for occurs - in this case when data is available. If you > put the condition as 0 it will never wake up. On timeout it will wake up, even if the condition is 0 ..... bu in this case the time out is too big. Try with small timeout value and you will see that your process wakes up. -Gaurav > > Also, why the huge timeout? If you just want to sleep forever, use > regular wait_event_interruptible. > > -- > Robert Hancock Saskatoon, SK, Canada > To email, remove "nospam" from hancockr@nospamshaw.ca > Home Page: http://www.roberthancock.com/ > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- - Gaurav my blog: http://lkdp.blogspot.com/ -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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