On Mon, 11 Jan 2010, pl bossart wrote: >> The improved and more clean fix in now in my tree: >> >> http://git.alsa-project.org/?p=alsa-kernel.git;a=commitdiff;h=1250932e48d3b698415b1f04775433cf1da688d6 >> > > The race condition is definitely gone. However I still see a NULL > event in snd_pcm_playback_poll() in pcm_native.c. > [13312.755305] ALSA: null poll event, avail 265 avail_min 8192 > > I couldn't figure out who generates this null event, and even better > it does not show in the report printed by my test app. I am somewhat > lost here as to how snd_pcm_playback_poll works. Note that do_poll() in linux/fs/select.c first checks all given fds if there's an event. So probably the userspace just called poll() for a reason in different timing than sound one (processing event from another fd or so). I believe it's normal behaviour. Jaroslav ----- Jaroslav Kysela <perex@xxxxxxxx> Linux Kernel Sound Maintainer ALSA Project, Red Hat, Inc. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
