read hangs at the position of 48KB in a file

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Hi,

I am a kernel newbie and playing in block layer
in Linux kernel. I am working in implementation of
a layer which remaps the LBA in the request into 
a specific position according to a policy I made.

I checked all the operation in my layer with
blktrace and I think it's ok. But it always hangs
at the position of 48KB (96 512-sectors) in reading
a file. I use EXT3 in top layer.

Could you figure out what the problem is with only
a simple hint? (hangs at 48KB)

Please comment me if you have something. Thank you.

-- 
Seongsu Lee, http://www.senux.com/

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