linux-kernel - Re: xfs: very slow after mount, very slow at umount

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Message-ID: <4D421507.1030006@teksavvy.com>
Date:	Thu, 27 Jan 2011 19:59:51 -0500
From:	Mark Lord <kernel@...savvy.com>
To:	Dave Chinner <david@...morbit.com>
CC:	Stan Hoeppner <stan@...dwarefreak.com>,
	Christoph Hellwig <hch@...radead.org>,
	Alex Elder <aelder@....com>,
	Linux Kernel <linux-kernel@...r.kernel.org>, xfs@....sgi.com
Subject: Re: xfs: very slow after mount, very slow at umount

On 11-01-27 06:41 PM, Dave Chinner wrote:
> On Thu, Jan 27, 2011 at 10:12:23AM -0500, Mark Lord wrote:
..
>> Can you recommend a good set of mkfs.xfs parameters to suit the characteristics
>> of this system? 
> 
> http://xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_for_.3Csomething.3E

That entry says little beyond "blindly trust the defaults".
But thanks anyway (really).

> And perhaps you want to consider the allocsize mount option, though
> that shouldn't be necessary for 2.6.38+...

That's a good tip, thanks.
>From my earlier posting:

>   /dev/sdb1 on /var/lib/mythtv type xfs
> (rw,noatime,allocsize=64M,logbufs=8,largeio)

Maybe that allocsize value could be increased though.
Perhaps something on the order of 256MB might do it.

Thanks again!
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