[meta-ti] io CPU usage high

[Cliff Brake]

I've noticed with recent Angstrom images running on OMAP class CPUs, it
seems the IO CPU usage is very high when running from SD cards.  When there
is a lot of disk activity, the system becomes fairly unresponsive, and CPU
io usage is usually pegged.  Is this expected?  I don't recall seeing this
with older kernels such as 2.6.39 which I'm using on an older project.

Thanks,
Cliff

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