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Date:	Mon, 19 Oct 2009 23:52:02 -0600
From:	Matthew Wilcox <>
To:	Greg Kroah-Hartman <>
	Jesse Barnes <>,
Subject: Re: [PATCH 0/3] Allow sysfs to be dynamically populated

On Mon, Oct 19, 2009 at 11:47:40PM -0600, Matthew Wilcox wrote:
> The second and third patches offer progressively more flexibility to
> dynamically construct the contents of sysfs directories.  The second
> patch delays the allocation of sysfs_dirents until the contents of
> the directory is requested.  This functionality is only used by the
> attribute_groups in that patch, but could (in principle) be extended to
> other directory providers.
> The third patch extends this to permit attribute groups to be dynamically
> constructed before the directory they're in is populated.  I also add a
> user for this; the much-requested ability to display the MSI-X vectors
> in use by a device.
> Both patches also deconstruct the directories / attribute groups when the
> dentry of the directory goes out of cache.

Oh, I meant to say, this is enough to get my laptop to boot.  I couldn't
swear to the non-existance of races, or the missing of features ... lots
of care needed with this patch, IMO.

Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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