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Date: Thu, 22 Apr 2010 22:19:38 -0500
From: Eric Sandeen <sandeen@sandeen.net>
MIME-Version: 1.0
Subject: Re: is realtime device supported?
References: <20100422144939.GA3822@laptop.oracle.com>
	<20100422162325.GA29668@infradead.org> <4BD07F06.70101@sandeen.net>
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To: Wengang Wang <wen.gang.wang@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>, greg.marsden@oracle.com, joe.jin@oracle.com, xfs@oss.sgi.com

Wengang Wang wrote:
> On 10-04-22 11:53, Eric Sandeen wrote:
>> Christoph Hellwig wrote:
>>> On Thu, Apr 22, 2010 at 10:49:39PM +0800, Wengang Wang wrote:
>>>> Do we support realtime device?
>>>>
>>>> I got the following error:
>>> It sounds like you do not have CONFIG_XFS_RT enable in your kernel
>>> configuration.  But to answer your original question the realtime
>>> device is not supported in the sense of actively maintained.  The
>>> code is still there, but more or less for legacy reasons.  I would
>>> not recommend it for new installations.
> 
> Yes, CONFIG_XFS_RT is disabled.
> [wwg@desk linux-2.6.18.x86_64]$ grep CONFIG_XFS_RT .config
> # CONFIG_XFS_RT is not set
> 
> And Ok I see. Also should we add the point to man page of mkfs.xfs?
> 
>> Agreed.
>>
>> FWIW, dmesg probably gave you a more helpful error message than
>> mount...
>>
>>                 cmn_err(CE_WARN, "XFS: RT mount failed");
>>
>> hm or maybe not ;)
> 
> Only "XFS: RT mount failed" :)

A patch to explicitly say that it failed because CONFIG_XFS_RT was off
would be happily accepted, too.

I am curious, are you doing a lot of QA type work on xfs?  You are finding
some interesting things that could certainly be fixed up, we appreciate it.

Thanks,
-Eric

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