Messages in this thread | | | From | "Nallasellan, Singaravelan" <> | Date | Tue, 6 Sep 2011 19:49:35 +0530 | Subject | RE: Player Thread is not woken after period elapsed |
| |
> please do not top post! > Ok. > correcting that mistake for you for this time > Thanks so much. > > >> > User thread which invokes the writei function which in turn invokes > >> > a kernel function which waits for the free buffer to write the > >> > audio data. This kernel function adds this thread to a > >> > wake(sleep) queue and calls a schedule_timeout > >> > (msecs_to_jiffies(10000)). > > > >> actually it doesn't... you must be on some really really old kernel > >> or something. > >> > > > Sorry, I have not provided the kernel version. Kernel version is > > 2.6.35. > > Please always test bugs like this with a recent kernel. 2.6.35 is pretty much 6 > versions (and 18 months) behind and at that point you really have to test with > something newer first before asking others to help you and spend their time on > your problem. > Unfortunately, I am stuck with that version as the product that I work on is on that version. > > >> > Will you provide some hint on how to go about identifying the root > >> > cause? > > >> https://lkml.org/lkml/2011/9/5/201 > I manually ported the changes and verified. I still see the issue. Found more information which might throw more light into the problem. p->state in try_to_wake_up() is 0 when it is expected to be 2 or 3.
> > However, wait_for_avail() does not have the code similar to the one > > provided in the patch below. > > the patch is against a recent kernel; no surprise that the code has changed in the > last 18 months.... > > > -- > Arjan van de Ven Intel Open Source Technology Centre > For development, discussion and tips for power savings, visit > http://www.lesswatts.org
| |