On 3/18/2021 4:32 PM, Takashi Iwai wrote:
On Thu, 18 Mar 2021 16:11:22 +0100,
Amadeusz Sławiński wrote:
This reverts commit f8e4ae10de43fbb7ce85f79e04eca2988b6b2c40.
It should be a format of commit ("description ...") as checkpatch.pl
would complain. The commit f8e4ae10de43 itself is a revert of commit
c31427d0d21e, and you need to give an explanation why the
revert-of-a-revert can work better at this time.
I don't mind improving it, however it seems like there is exception done
in checkpatch for "This reverts commit", so there is no warning on this
line.
Will add explanation.
thanks,
Takashi
On systems where there is 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@xxxxxxx>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@xxxxxxxxxxxxxxx>
---
sound/hda/Kconfig | 7 +++----
1 file 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.
--
2.25.1
