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authorAmadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>2021-03-18 17:06:18 +0100
committerTakashi Iwai <tiwai@suse.de>2021-03-19 16:55:11 +0100
commitf4b4bdf29ace71475b18aae9377402a534f09a72 (patch)
tree8dc43b58b1f0c03dfd7239f73570b7e61d80ebfc /sound/hda
parent12b2b508300d08206674bfb3f53bb84f69cf2555 (diff)
ALSA: hda: Revert "ALSA: hda: Allow setting preallocation again for x86"
This reverts commit f8e4ae10de43 ("ALSA: hda: Allow setting preallocation again for x86"). The reverted commit itself is a revert of c31427d0d21e ("ALSA: hda: No preallocation on x86 platforms"). It was needed because HDA allowed very big allocations, up to 1GB per stream. However as previous commit in this series changes maximum allowed allocation per stream to 4MB, we can safely revert it back. On systems where there are a lot of FrontEnds, when CONFIG_SND_HDA_PREALLOC_SIZE != 0 ALSA core allocates memory for each FE, which may cause out of memory problems due to per card limit. Force config to 0 on X86, so memory will be allocated on as needed basis. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=201251#c322 Suggested-by: Takashi Iwai <tiwai@suse.de> Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> Link: https://lore.kernel.org/r/20210318160618.2504068-4-amadeuszx.slawinski@linux.intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda')
-rw-r--r--sound/hda/Kconfig7
1 files changed, 3 insertions, 4 deletions
diff --git a/sound/hda/Kconfig b/sound/hda/Kconfig
index 57595f1552c9..741179ccbd4e 100644
--- a/sound/hda/Kconfig
+++ b/sound/hda/Kconfig
@@ -21,17 +21,16 @@ config SND_HDA_EXT_CORE
select SND_HDA_CORE
config SND_HDA_PREALLOC_SIZE
- int "Pre-allocated buffer size for HD-audio driver"
+ int "Pre-allocated buffer size for HD-audio driver" if !SND_DMA_SGBUF
range 0 32768
- default 2048 if SND_DMA_SGBUF
+ default 0 if SND_DMA_SGBUF
default 64 if !SND_DMA_SGBUF
help
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 2048 as a reasonable value for
- most of modern systems.
+ 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.