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Re: [PATCH 2/3] XFS: Make use of the init-once slab optimisation.

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: [PATCH 2/3] XFS: Make use of the init-once slab optimisation.
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 15 Sep 2008 17:11:17 -0400
Cc: xfs@xxxxxxxxxxx
In-reply-to: <1221314627-29065-3-git-send-email-david@xxxxxxxxxxxxx>
References: <1221314627-29065-1-git-send-email-david@xxxxxxxxxxxxx> <1221314627-29065-3-git-send-email-david@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
On Sun, Sep 14, 2008 at 12:03:46AM +1000, Dave Chinner wrote:
> To avoid having to initialise some fields of the XFS inode
> on every allocation, we can use the slab init-once feature
> to initialise them. All we have to guarantee is that when
> we free the inode, all it's entries are in the initial state.
> Add asserts where possible to ensure debug kernels check this
> initial state before freeing and after allocation.

This looks like it's already in:
http://oss.sgi.com/cgi-bin/gitweb.cgi?p=xaiki/xfs-linux-2.6-xfs-cvs/.git;a=commitdiff;h=12efb888674600ce73a64f8c6f4a20ea5e1ce4f1

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