Memory problems are back with SB Live!

Memory problems are back with SB Live!

[Chris Rankin]

Hi,

My box has now accumulated almost 3 weeks of uptime,
and so the ALSA memory problem is back again:

$ aplay /usr/lib/sounds/jungle_exit.wav 
Playing WAVE '/usr/lib/sounds/jungle_exit.wav' :
Signed 16 bit Little Endian, Rate 22050 Hz, Stereo
ALSA lib pcm_hw.c:297:(snd_pcm_hw_hw_params)
SNDRV_PCM_IOCTL_HW_PARAMS failed: Cannot allocate
memory
aplay: set_params:814: Unable to install hw params:
ACCESS:  RW_INTERLEAVED
FORMAT:  S16_LE
SUBFORMAT:  STD
SAMPLE_BITS: 16
FRAME_BITS: 32
CHANNELS: 2
RATE: 22050
PERIOD_TIME: 100000
PERIOD_SIZE: 2205
PERIOD_BYTES: 8820
PERIODS: 5
BUFFER_TIME: 500000
BUFFER_SIZE: 11025
BUFFER_BYTES: 44100
TICK_TIME: 10000

Is that patch you sent me to hack^Wfix this still
relevant, or will it make things worse? I've noticed a
few changes to these parts of the kernel drivers.

As an aside, my memory looks like this:
$ free -t
             total       used       free     shared   
buffers     cached
Mem:       1033544    1011004      22540          0   
  53776     728244
-/+ buffers/cache:     228984     804560
Swap:       498004       8168     489836
Total:     1531548    1019172     512376

Isn't Linux supposed to surrender disk-cache memory if
another process requests it? Surely *some* of that
1011004 KB cache must be usable!?

Chris

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Re: Memory problems are back with SB Live!

[Takashi Iwai]

[-- Attachment #1: Type: text/plain, Size: 1041 bytes --]

Hi Chris,

sorry for late reply - i'm just back from vacation.

At Tue, 19 Nov 2002 21:55:16 +0000 (GMT),
Chris Rankin wrote:
> 
> Hi,
> 
> My box has now accumulated almost 3 weeks of uptime,
> and so the ALSA memory problem is back again:
> 
> $ aplay /usr/lib/sounds/jungle_exit.wav 
> Playing WAVE '/usr/lib/sounds/jungle_exit.wav' :
> Signed 16 bit Little Endian, Rate 22050 Hz, Stereo
> ALSA lib pcm_hw.c:297:(snd_pcm_hw_hw_params)
> SNDRV_PCM_IOCTL_HW_PARAMS failed: Cannot allocate
> memory
> aplay: set_params:814: Unable to install hw params:
> ACCESS:  RW_INTERLEAVED
> FORMAT:  S16_LE
> SUBFORMAT:  STD
> SAMPLE_BITS: 16
> FRAME_BITS: 32
> CHANNELS: 2
> RATE: 22050
> PERIOD_TIME: 100000
> PERIOD_SIZE: 2205
> PERIOD_BYTES: 8820
> PERIODS: 5
> BUFFER_TIME: 500000
> BUFFER_SIZE: 11025
> BUFFER_BYTES: 44100
> TICK_TIME: 10000
> 
> Is that patch you sent me to hack^Wfix this still
> relevant, or will it make things worse?

i found bugs in the old patch.
the attached patch should work better.
could you try it?


ciao,

Takashi

[-- Attachment #2: sgbuf-getpage.dif --]
[-- Type: application/octet-stream, Size: 1191 bytes --]

Index: alsa-kernel/core/pcm_sgbuf.c
===================================================================
RCS file: /suse/tiwai/cvs/alsa/alsa-kernel/core/pcm_sgbuf.c,v
retrieving revision 1.7
diff -u -r1.7 pcm_sgbuf.c
--- alsa-kernel/core/pcm_sgbuf.c	10 Sep 2002 10:20:00 -0000	1.7
+++ alsa-kernel/core/pcm_sgbuf.c	28 Oct 2002 14:35:43 -0000
@@ -128,7 +128,32 @@
 	while (sgbuf->pages < pages) {
 		void *ptr;
 		dma_addr_t addr;
+#ifdef __i386__
+		/* HACK! we try to allocate with GFP_KERNEL */
+		unsigned long rmask;
+		if (sgbuf->pci)
+			rmask = ~(unsigned long)sgbuf->pci->dma_mask;
+		else
+			rmask = 0;
+		ptr = (void *)__get_free_page(GFP_KERNEL);
+		if (ptr) {
+			addr = virt_to_phys(ptr);
+			if (((unsigned long)addr + PAGE_SIZE - 1) & rmask) {
+				/* reallocate with the proper mask */
+				free_page((unsigned long)ptr);
+				ptr = (void *)__get_free_page(GFP_KERNEL | GFP_DMA);
+				if (ptr)
+					addr = virt_to_phys(ptr);
+				else
+					addr = 0;
+			}
+		} else
+			addr = 0;
+		if (ptr)
+			memset(ptr, 0, PAGE_SIZE);
+#else
 		ptr = snd_malloc_pci_pages(sgbuf->pci, PAGE_SIZE, &addr);
+#endif
 		if (! ptr)
 			return -ENOMEM;
 		sgbuf->table[sgbuf->pages].buf = ptr;