* 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-b...@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.red...@avionic-design.de>
pgpyQgIjNEHX0.pgp
Description: PGP signature
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