At Wed, 5 Sep 2007 18:04:30 -0500, Lopez Cruz, Misael wrote:

Hi,

I'm experiencing kernel crashes in an omap platform when playing audio files with 'aplay -M' (mmap option) the second time a file is played.

The behavior depends on the alsa-lib setup. Doesn't the default config use dmix, right? If so, it looks like an access to wrong mapped pages.

Any suggestion where to start debugging this? Is there a common cause for this failure?

Check substream->mmap_count. It's incremented/decremented in snd_pcm_mmap_data_open/close in include/pcm.h. It has to reach to zero properly with closing a PCM stream.

Takashi