2009-07-23 10:42:33     MMC card support in 2009R1-2010pre

2009-07-23 10:42:33     MMC card support in 2009R1-2010pre

Peter Gombos (HUNGARY)

Message: 77968   

Hi,

My custom board have an SD card on SPI SSEL5.

Speed is 20MHz, SPI_MODE_3. The card is a 2G Sandisk micro SD.

The file system is ext3 or vfat, doesn't matter.

I wrote a simple script which fills the card with data. A new directory created in every seconds and textfiles created inside the dir.

The problem is that after 130-160 seconds an exception occures, page allocation failure.

My question is: is it stable for others? What can I do? Any suggestion?

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2009-07-23 10:51:32     Re: MMC card support in 2009R1-2010pre

Mike Frysinger (UNITED STATES)

Message: 77970   

flush the page cache manually with /proc/sys/vm/drop_caches

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2009-07-29 04:33:21     Re: MMC card support in 2009R1-2010pre

Peter Gombos (HUNGARY)

Message: 78144   

I tried. Nothing changed but i have more free memory and less allocated buffers.

I did the same test in initramfs and the result is the same. The system hangs before running out of memory.

I'll attach my test script after my summer holiday ended.