On Thu, Jul 23, 2009 at 06:58:59PM +0900, Kuninori Morimoto wrote: > o why aplay say underrun!!! ? > where should I check ? Underrun means that the driver is consuming data more quickly than aplay is able to provide it. This may mean that there's some system performance problem or it may be due to your driver is consuming data more quickly than it should and causing problems further up the stack. > o sometimes BUG_ON is called when I use kmalloc on > snd_soc_dai_ops :: trigger. > This BUG_ON came frome cache_alloc_refill. > Should I not use kmalloc on trigger function ? You shouldn't be using kmalloc() there, no - the trigger function is called from an atomic context where only very limited memory allocation is possible. I'll have a look at your code, but it's likely to be a few days before I have time to do so. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
