* Jason Cooper wrote:
This patch dramatically drops the amount of time u-boot needs to read a file from an ext2 partition. On a typical 2 to 5 MB file (kernels and initrds) it goes from tens of seconds to a couple seconds.
All we are doing here is grouping contiguous blocks into one read.
Boot tested on Globalscale Technologies Dreamplug (Kirkwood ARM SoC) with three different files. sha1sums were calculated in Linux userspace, and then confirmed after ext2load.
Signed-off-by: Jason Cooper u-boot@lakedaemon.net
Before:
Tegra2 (Medcom) # time ext2load mmc 0 0x17000000 /boot/uImage Loading file "/boot/uImage" from mmc device 0:1 (xxa1) 5609104 bytes read
time: 4.638 seconds, 4638 ticks Tegra2 (Medcom) # crc32 0x17000000 559690 CRC32 for 17000000 ... 1755968f ==> 158788be
After:
Tegra2 (Medcom) # time ext2load mmc 0 0x17000000 /boot/uImage Loading file "/boot/uImage" from mmc device 0:1 (xxa1) 5609104 bytes read
time: 0.317 seconds, 317 ticks Tegra2 (Medcom) # crc32 0x17000000 559690 CRC32 for 17000000 ... 1755968f ==> 158788be
I can also successfully load the loaded uImage to a prompt, so:
Tested-by: Thierry Reding thierry.reding@avionic-design.de