SND_PCM_LIB_ALLOC_VM - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2.6.
Note : Sound Devices
NAMEsnd_pcm_lib_alloc_vmalloc_buffer − allocate virtual DMA buffer
SYNOPSISint snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream * substream, size_t size);
ARGUMENTSsubstream the substream to allocate the buffer to size the requested buffer size, in bytes
DESCRIPTIONAllocates the PCM substream buffer using vmalloc, i.e., the memory is contiguous in kernel virtual space, but not in physical memory. Use this if the buffer is accessed by kernel code but not by device DMA. Returns 1 if the buffer was changed, 0 if not changed, or a negative error code.
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Online Linux Manual Page : Version : Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.29
Online Linux Manual Page : Library : lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page : Library : lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base : Version : Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base : Library : lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36
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