linux-kernel - How to filter the Block I/O in 2.6 kernel?

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Message-ID: <6f4bf7350805202105g2594d85dt1ae3b650e3e3671@mail.gmail.com>
Date:	Wed, 21 May 2008 12:05:30 +0800
From:	"XiongJia Le" <lexiongjia@...il.com>
To:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: How to filter the Block I/O in 2.6 kernel?

How to filter the Block I/O in 2.6 kernel?

I have looked some in blktrace.
blktrace can trace the block device I/O info. But that can't
filter/change this I/O.

Is the Linux kernel have any way to filter/change a block i/o before
it write to hard disk?
I don't want to change kernel code and re-build. Is Kernel already
have any I/O filter interface?

Thanks,
Xiongjia Le
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