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CONFIG_SND_HDA_PREALLOC_SIZE: Pre-allocated buffer size for HD-audio driver

General informations

The Linux kernel configuration item CONFIG_SND_HDA_PREALLOC_SIZE has multiple definitions:

Pre-allocated buffer size for HD-audio driver found in sound/hda/Kconfig

The configuration item CONFIG_SND_HDA_PREALLOC_SIZE:

Help text

Specifies the default pre-allocated buffer-size in kB for the HD-audio driver. A larger buffer (e.g. 2048) is preferred for systems using PulseAudio. The default 64 is chosen just for compatibility reasons. On x86 systems, the default is zero as we need no preallocation.

Note that the pre-allocation size can be changed dynamically via a proc file (/proc/asound/card*/pcm*/sub*/prealloc), too.

Pre-allocated buffer size for HD-audio driver found in sound/pci/hda/Kconfig

The configuration item CONFIG_SND_HDA_PREALLOC_SIZE:

Help text

Specifies the default pre-allocated buffer-size in kB for the HD-audio driver. A larger buffer (e.g. 2048) is preferred for systems using PulseAudio. The default 64 is chosen just for compatibility reasons.

Note that the pre-allocation size can be changed dynamically via a proc file (/proc/asound/card*/pcm*/sub*/prealloc), too.

Hardware

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