linux-kernel - Re: [PATCH 01/11] sysfs: Support for preventing unmounts.

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Message-Id: <1213893131.7922.67.camel@nimitz>
Date:	Thu, 19 Jun 2008 09:32:11 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Tejun Heo <htejun@...il.com>, Greg Kroah-Hartman <gregkh@...e.de>,
	linux-kernel@...r.kernel.org, Al Viro <viro@....linux.org.uk>,
	Linux Containers <containers@...ts.osdl.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Benjamin Thery <benjamin.thery@...l.net>
Subject: Re: [PATCH 01/11] sysfs: Support for preventing unmounts.

On Wed, 2008-06-18 at 13:12 -0700, Eric W. Biederman wrote:
> 
> - The data in sysfs fundamentally changes behind the back of the
>   VFS and we need to keep the VFS in sync.  Essentially this is the
>   distributed filesystem problem.
> 
> - In particular for sysfs_rename and sysfs_move_dir we need to support
> finding
>   the dcache entries and calling d_move.  So that the dcache does not
>   get into an inconsistent state.  Timeouts and invalidates like NFS
>   uses are to be  avoided if at all possible.

Much clearer now, thanks!

Can we get this description into the changelog, pretty please?

-- Dave

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