linux-kernel - Re: [PATCH 0/6] overlay filesystem

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Message-ID: <87vcxijz66.fsf@tucsk.pomaz.szeredi.hu>
Date:	Tue, 10 May 2011 18:30:41 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	Michal Suchanek <hramrach@...trum.cz>
Cc:	viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, apw@...onical.com, nbd@...nwrt.org,
	neilb@...e.de
Subject: Re: [PATCH 0/6] overlay filesystem

Michal Suchanek <hramrach@...trum.cz> writes:

> Hello
>
> On 18 April 2011 18:00, Miklos Szeredi <miklos@...redi.hu> wrote:
>> Here's an updated version of the overlay filesystem.
>>
>> Git tree is here:
>>
>>  git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs.v8
>>
>> Changes from v7 to v8:
>>
>> - split overlayfs.c into smaller files
>>
>> - fix locking for copy up (reported by Al Viro)
>>
>> - locking analysis of copy up vs. directory rename added as a comment
>>
>> - tested with lockdep, fixed one lock annotation
>>
>> - other bug fixes
>>
>> To be done:
>>
>> - redo i_op->open, waiting for status of atomic_open() from Al
>>
>> - look into xattr support for tmpfs
>>
>
> What's still required for overlayfs to get into the kernel?
>
> With the additional patches posted in the v8 branch (the modular build
> fix and the xattr for tmpfs patch) overlayfs works for me.
>
> I rebuilt my linux rescue system to use
> overlayfs/tmpfs+squashfs/loop/fuse.httpfs and used it a few times
> without any issues.
>
> This system has about 1.6G data in 68599 files, 6960 directories and
> 7634 symlinks (compressed to about 630M squashfs).

Great, thanks for reporting on your test results.

Before posting v9 I'd like to clear up the bug observed by Jordi.  Then
it will need to be acked by Al Viro before going into mainline.

Thanks,
Miklos
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