[U-Boot] ext2 file system performance

jonsmirl at gmail.com jonsmirl at gmail.com
Fri Mar 16 02:20:34 CET 2012

The ext2 file system code is reading the kernel image off from my SD
card one sector at a time. Of course this takes 61 seconds to get the
kernel in to memory. Loading the same kernel off from the same SD on
FAT takes less than a second.

Nice quick FAT reads...

reading uImage
JDS start 7c0 count 1
JDS start 9d0 count 2
JDS start 7d0 count 6
JDS start 1aa0 count 1090
JDS start 2b30 count e
JDS start 2b3e count 1

Ext2 takes about 8,000 single sector reads. File is not fragmented, it
is the only file on a freshly formatted volume.
Is there anyway to convince the ext2 code to use larger reads?

Jon Smirl
jonsmirl at gmail.com

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