xfssyncd and disk spin down

[Petre Rodan]

Hello Dave,

On Tue, Dec 28, 2010 at 01:07:50AM +1100, Dave Chinner wrote:
> Turn on the XFS tracing so we can see what is being written every
> 36s.  When the problem shows up:
> 
> # echo 1 > /sys/kernel/debug/tracing/events/xfs/enable
> # sleep 100
> # cat /sys/kernel/debug/tracing/trace > trace.out
> # echo 0 > /sys/kernel/debug/tracing/events/xfs/enable
> 
> And post the trace.out file for us to look at.

attached.

you can disregard all the lvm partitions ('dev 254:.*') since they are on a different drive, probably only 8:17 is of interest.

bye,
peter

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