From mboxrd@z Thu Jan 1 00:00:00 1970 From: xpankajbx@gmail.com (Pankaj B) Date: Sat, 23 Apr 2011 09:16:00 +0530 Subject: work_struct not getting scheduled In-Reply-To: <20110421153251.GA2260@michaelblizek.twilightparadox.com> References: <20110421153251.GA2260@michaelblizek.twilightparadox.com> Message-ID: To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org On Thu, Apr 21, 2011 at 9:02 PM, Michael Blizek < michi1@michaelblizek.twilightparadox.com> wrote: > Hi! > > On 17:44 Thu 21 Apr , Pankaj B wrote: > ... > > INIT_WORK(&event->work, do_handling_work); > > schedule_work(&event->work); > > flush_scheduled_work(); > > > > But the work never gets scheduled. I have put some printks in the > > do_handling_work() function. Creating workqueue and queueing > > the work to that workqueue doen't work either. I find this a > > very strange problem. Does anybody knows about this? > > > > FYI: my system has heavy IO load when I schedule the work. > > 1) Why call flush_scheduled_work? This function will wait until > do_handling_work is finished. You could just call do_handling_work > directly... do_handling_work is to be called/scheduled from the interrupt context. Actually I was not calling flush_scheduled_work() initially(it sleeps), I tried it because work was not getting scheduled. I can not call do_handling_work() directly because it sleeps. > > 2) If you have heavy IO load, it might will up the workqueues. It should > not > cause total starvation. But if (1) did not solve your problem, try > reproducing > it while the system is idle. > Work get scheduled when the system is idle. Somehow the work is getting scheduled now. I doubt another thread which was causing system to become non-responsive for most of the time. @Dave: I am using linux kernel 2.6.30.2 @Himanshu: Good point. I checked return value of schedule_work(), I am getting non-zero value which is expected. Thank you all. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110423/02e813d0/attachment.html