linux-kernel - How to get the log of cfq from the userspace

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Message-ID: <100eff551001161552t4ff78e50vb5efa151e571349a@mail.gmail.com>
Date:	Sat, 16 Jan 2010 18:52:59 -0500
From:	Yuehai Xu <yuehaixu@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	yhxu@...ne.edu
Subject: How to get the log of cfq from the userspace

Hi all,

I notice there are many log infos in cfq which uses cfq_log_cfqq,
however, how can I get these logs in the userspace? I tried blktrace,
but it seems that this tool doesn't provide the info from
cfq_log_cfqq.

Thanks!

Yuehai
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