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

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Message-ID: <20080619221941.588r3j9ascw0oco4@intran0x.frec.bull.fr>
Date:	Thu, 19 Jun 2008 22:19:41 +0200
From:	"Benjamin Thery " <Benjamin.Thery@...l.net>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	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>
Subject: Re: [PATCH 01/11] sysfs: Support for preventing unmounts.

Quoting Dave Hansen <dave@...ux.vnet.ibm.com>:

> 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?

Yes sure.
I'll add it to the patch introduction.

Benjamin

>
> -- Dave
>
>
>



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