An error about block I/O subsystem

From: 韩磊
Date: Thu Jan 16 2014 - 02:23:16 EST

I have implented an I/O scheduler in Linux 2.6.But when I use fio to
test it,the kernel message often print some words,like this
"deadline_rb: forced dispatching is broken (nr_sorted=1),please report

I have no idea about it,maybe my scheduler has some problems.But I
want to know why!
Thank you!
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