Add debug prints after calls of do_alloc_pages. One simplification would be to move print into do_alloc_pages, however it would cause spam in logs, as preallocate_pcm_pages loops over do_alloc_pages trying lower values in case of failures.
Signed-off-by: Amadeusz Sławiński amadeuszx.slawinski@linux.intel.com --- sound/core/pcm_memory.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c index 289dd1fd8fe7..2878c4c23583 100644 --- a/sound/core/pcm_memory.c +++ b/sound/core/pcm_memory.c @@ -176,6 +176,10 @@ static void snd_pcm_lib_preallocate_proc_write(struct snd_info_entry *entry, substream->dma_buffer.dev.dev, size, &new_dmab) < 0) { buffer->error = -ENOMEM; + pr_debug("ALSA pcmC%dD%d%c,%d:%s: cannot preallocate for size %zu\n", + substream->pcm->card->number, substream->pcm->device, + substream->stream ? 'c' : 'p', substream->number, + substream->pcm->name, size); return; } substream->buffer_bytes_max = size; @@ -400,6 +404,10 @@ int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size) substream->dma_buffer.dev.dev, size, dmab) < 0) { kfree(dmab); + pr_debug("ALSA pcmC%dD%d%c,%d:%s: cannot preallocate for size %zu\n", + substream->pcm->card->number, substream->pcm->device, + substream->stream ? 'c' : 'p', substream->number, + substream->pcm->name, size); return -ENOMEM; } }