> -----Original Message----- > From: Jeff Haran > Sent: Tuesday, May 26, 2015 10:31 AM > To: 'Chan Kim'; kernelnewbies@xxxxxxxxxxxxxxxxx > Subject: RE: wake_up_interruptible in ISR > > > -----Original Message----- > > From: kernelnewbies-bounces@xxxxxxxxxxxxxxxxx > [mailto:kernelnewbies- > > bounces@xxxxxxxxxxxxxxxxx] On Behalf Of Chan Kim > > Sent: Monday, May 25, 2015 10:23 PM > > To: kernelnewbies@xxxxxxxxxxxxxxxxx > > Subject: wake_up_interruptible in ISR > > > > > > > > Hello, > > > > I see in the source (linux ver 3.3) that wake_up_interruptible > > function doesn't sleep > Please ignore the below. I confused it with wake_event_interruptible(). No enough coffee yet this morning. Sorry for the confusion. Jeff Haran > Not sure how you came to that conclusion, but calling that function definitely > can result in an attempt to do a context switch. That's what the "scheduling > while atomic" is telling you. > To my knowledge it is only safe to call this from process context. > > No ISRs, no bottom halves. > > Could be it's that "_interruptible" in the name that is misleading you. That > means the wait can be interrupted and the call can return if the process > doing the waiting is delivered a signal. It's got nothing to do with "interrupts" > per se. > > Jeff Haran > > > so I used in it an ISR but I'm getting 'BUG:scheduling while atomic' > > message. (I'm not sure it's coming from this) I'm looking for the > > exact cause but Is there any caveat when using wake_up_interruptible() in > an ISR? > > (I found some drivers use it in ISR, some use it in work_struct) > > > > I also read in http://www.slideshare.net/rampalliraj/tasklet-vs-work- > > queues?from_action=save that tasklet is not allowed to sleep but work is. > > (because tasklet is not in process context, but in bottom-half) I > > don't know if I have to move my wake_up_interruptible function to > > tasklet or > > work(queue) or even it matters to the current problem. > > > > Any tip will be appreciated. > > Regards, > > > > Chan > > _______________________________________________ > > Kernelnewbies mailing list > > Kernelnewbies@xxxxxxxxxxxxxxxxx > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
