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Re: [PATCH 1/2] xfs: drop dmapi hooks

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH 1/2] xfs: drop dmapi hooks
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Fri, 21 May 2010 16:36:17 -0500
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20100510140823.GA16540@xxxxxxxxxxxxx>
References: <20100510140823.GA16540@xxxxxxxxxxxxx>
User-agent: Thunderbird 2.0.0.24 (Macintosh/20100228)
Christoph Hellwig wrote:
> Dmapi support was never merged upstream, but we still have a lot of hooks
> bloating XFS for it, all over the fast pathes of the filesystem.
> 
> This patch drops over 700 lines of dmapi overhead.  If we'll ever get HSM
> support in mainline at least the namespace events can be done much saner
> in the VFS instead of the individual filesystem, so it's not like this
> is much help for future work.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

yeah, probably about time.

There is a fair bit of dmapi crumbs left though:

[sandeen@sandeen xfs]$ grep -ri dmapi * | wc -l
63

so I think this patch can go further toward its goal...

-Eric

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