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:

• prompt: Pre-allocated buffer size for HD-audio driver
• type: int
• depends on: ( CONFIG_SND_DMA_SGBUF ) && (! CONFIG_SND_DMA_SGBUF )
• defined in sound/hda/Kconfig
• found in Linux kernels: 4.2–4.20, 5.0–5.19, 6.0–6.14, 6.15-rc+HEAD

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 S/G allocation works and no preallocation is needed in most cases.

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:

• prompt: Pre-allocated buffer size for HD-audio driver
• type: int
• depends on: (none)
• defined in sound/pci/hda/Kconfig
• found in Linux kernels: 3.1–3.19, 4.0–4.1

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

LKDDb

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• (none)

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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