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Re: xfssyncd syncing every five seconds?

To: Steve Lord <lord@xxxxxxx>
Subject: Re: xfssyncd syncing every five seconds?
From: Karol Kozimor <sziwan@xxxxxxxxxxx>
Date: Sun, 21 Sep 2003 14:21:37 +0200
Cc: Simon Matter <simon.matter@xxxxxxxxxxxxxxxx>, Nathan Scott <nathans@xxxxxxx>, Jeremy Field <jezza@xxxxxxxxx>, linux-xfs@xxxxxxxxxxx
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Thus wrote Steve Lord:
> I could gripe about folks reporting this after the release, rather
> than before it... I just logged into my workstation from home, and
> watched it for a minute or two, zero I/O during this time. On the
> other hand, my laptop does appear to be doing periodic I/O and it
> does seem to be every 5 seconds. I have also had a report of someone
> not being able to keep their disks spun down in 2.6 on a laptop.
> 
> Scratching my head so far, 5 seconds does not really tie up with
> any xfs thread.

Please do search for laptop-mode patches published on lkml several times.
They have a sysctl setting that, when turned on, dumps the processes or
threads doing I/O on screen. Using that patch, I was able to successfully
spin my disk down to about 1 minute (the maximum sysctl setting for
xfssyncd or the other).
Best regards,

-- 
Karol 'sziwan' Kozimor
sziwan@xxxxxxxxxxx


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