On Sun, 24 Aug 2014 19:46:41 +0200, Flash ROM wrote:

>> Happens a 100% of the time here, annoyingly. As mentioned, 3.15 was
>> working for me, and still does. Multiple reboots and it happens
>> immediately on boot even before gdm comes up.
> Would be logical to do block-level I/O tracing to get idea WHAT is this
> IO, right?

Or you could just use proper tools for this:

iotop:
http://guichaz.free.fr/iotop/

iosnoop:
http://www.brendangregg.com/blog/2014-07-16/iosnoop-for-linux.html

Probably either a continuing balance or autodefrag vs. systemd's logging.

-h

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