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Re: xfssyncd and disk spin down

To: xfs@xxxxxxxxxxx
Subject: Re: xfssyncd and disk spin down
From: Michael Weissenbacher <mw@xxxxxxxxxxxx>
Date: Tue, 31 May 2011 17:16:29 +0200
In-reply-to: <loom.20110531T163459-953@xxxxxxxxxxxxxx>
References: <20101223165532.GA23813@xxxxxxxxxxxxxxxx> <20101227021904.GA24828@dastard> <20101227061629.GA2275@xxxxxxxxxxxxxxxxxx> <20101227140750.GB24828@dastard> <20101227171939.GA7759@xxxxxxxxxxxxxxxxxx> <20101231001323.GD15179@dastard> <20110120100143.GA2007@xxxxxxxxxxxxxxxx> <20110120234310.GV16267@dastard> <20110210204254.GA10451@xxxxxxxxxxxxxxxx> <20110210221851.GG2559@dastard> <loom.20110214T185310-606@xxxxxxxxxxxxxx> <loom.20110531T163459-953@xxxxxxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110424 Thunderbird/3.1.10
Brian wrote:
> 
> Can anyone please comment if this bug was ever fixed?
> 
> I have searched and see no further talk about this.
> 
> echo 720000 > /proc/sys/fs/xfs/xfssyncd_centisecs allows a drive to sleep more
> often, but still is impacted by this. 
> 
> Thanks!
> 
AFAICT nothing has changed in this regard. I sill see the same behavior
with kernel 2.6.39. Thanks to this thread i found out about the problems
related to accumulating head unloads which i was able to mitigate by
setting xfssyncd_centisecs to a higher value.

cheers,
Michael

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