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The commitc31427d0d2("ALSA: hda: No preallocation on x86 platforms") changed CONFIG_SND_HDA_PREALLOC_SIZE setup and its default to zero for x86, as the preallocation should work almost all cases. However, this expectation was too naive; some applications try to allocate as the max buffer size as possible, and it leads to the memory exhaustion. More badly, the commit changed the kconfig no longer adjustable for x86, so you can't fix it statically (although it can be still adjusted via procfs). So, practically seen, it's more recommended to set a reasonable limit for x86, too. This patch follows to that experience, and changes the default to 2048 and allow the kconfig adjustable again. Fixes:c31427d0d2("ALSA: hda: No preallocation on x86 platforms") Cc: <stable@vger.kernel.org> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207223 Link: https://lore.kernel.org/r/20200413201919.24241-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
49 lines
1.2 KiB
Plaintext
49 lines
1.2 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config SND_HDA_CORE
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tristate
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select REGMAP
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config SND_HDA_DSP_LOADER
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bool
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config SND_HDA_ALIGNED_MMIO
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bool
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config SND_HDA_COMPONENT
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bool
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config SND_HDA_I915
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bool
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select SND_HDA_COMPONENT
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config SND_HDA_EXT_CORE
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tristate
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select SND_HDA_CORE
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config SND_HDA_PREALLOC_SIZE
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int "Pre-allocated buffer size for HD-audio driver"
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range 0 32768
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default 2048 if SND_DMA_SGBUF
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default 64 if !SND_DMA_SGBUF
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help
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Specifies the default pre-allocated buffer-size in kB for the
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HD-audio driver. A larger buffer (e.g. 2048) is preferred
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for systems using PulseAudio. The default 64 is chosen just
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for compatibility reasons.
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On x86 systems, the default is 2048 as a reasonable value for
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most of modern systems.
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Note that the pre-allocation size can be changed dynamically
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via a proc file (/proc/asound/card*/pcm*/sub*/prealloc), too.
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config SND_INTEL_NHLT
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bool
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# this config should be selected only for Intel ACPI platforms.
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# A fallback is provided so that the code compiles in all cases.
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config SND_INTEL_DSP_CONFIG
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tristate
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select SND_INTEL_NHLT if ACPI
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# this config should be selected only for Intel DSP platforms.
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# A fallback is provided so that the code compiles in all cases.
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