how to have linux kernel export /proc/[pid]/io?
<p>Im running linux on my board and have to read info in /proc/[pid]/io. But it is not found.</p>

<p>For ex:</p>

<pre><code>$ dd if=/dev/zero of=/tmp/aa &amp;
[1] 926
$ cat /proc/926/io
cat: /proc/926/io: No such file or directory
</code></pre>

<p>Which I need enable to have kernel export that?</p>

<p>Many thanks for your help!</p>