From: Jan Engelhardt <jengelh@inai.de>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: "J. R. Okajima" <hooanon05@yahoo.co.jp>,
viro@ZenIV.linux.org.uk, torvalds@linux-foundation.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
hch@infradead.org, akpm@linux-foundation.org, apw@canonical.com,
nbd@openwrt.org, neilb@suse.de, jordipujolp@gmail.com,
ezk@fsl.cs.sunysb.edu, dhowells@redhat.com,
sedat.dilek@googlemail.com
Subject: Re: [PATCH 00/13] overlay filesystem: request for inclusion (v15)
Date: Sun, 23 Sep 2012 15:02:30 +0200 (CEST) [thread overview]
Message-ID: <alpine.LNX.2.01.1209231500400.15692@nerf07.vanv.qr> (raw)
In-Reply-To: <877grozaih.fsf@tucsk.pomaz.szeredi.hu>
On Thursday 2012-09-20 22:48, Miklos Szeredi wrote:
>
>> Miklos, how do you think about this?
>> <http://marc.info/?l=linux-kernel&m=123938533724484&w=2>
>> Do you think UnionMount is totally gone?
>
>Unionmount provides almost the same functionality as overlayfs. The big
>difference between the two is that unionmounts resides 100% in the VFS
>while 95% of overlayfs is plain filesystem code. I think that's the
>biggest advantage: filesystem code is easier to maintain, has less
>impact on core complexity, etc.
The big advantage is actually that the unioned view is in a separate
namespace (vfsmount).
>Aufs provides much better filesystem semantics than either unionmounts
>or overlayfs. But that does come at a price:
>
>aufs: 98 files changed, 29893 insertions(+), 7 deletions(-)
>overlayfs: 22 files changed, 2981 insertions(+), 10 deletions(-)
In two years time when sufficient user requests have come in,
overlayfs is likely to have wrong as much.
prev parent reply other threads:[~2012-09-23 13:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-20 18:55 [PATCH 00/13] overlay filesystem: request for inclusion (v15) Miklos Szeredi
2012-09-20 18:55 ` [PATCH 01/13] vfs: add i_op->dentry_open() Miklos Szeredi
2012-09-20 18:55 ` [PATCH 02/13] vfs: export do_splice_direct() to modules Miklos Szeredi
2012-09-20 18:55 ` [PATCH 03/13] vfs: introduce clone_private_mount() Miklos Szeredi
2012-09-20 18:55 ` [PATCH 04/13] overlay filesystem Miklos Szeredi
2012-09-20 18:55 ` [PATCH 05/13] overlayfs: add statfs support Miklos Szeredi
2012-09-20 18:55 ` [PATCH 06/13] overlayfs: implement show_options Miklos Szeredi
2012-09-20 18:55 ` [PATCH 07/13] overlay: overlay filesystem documentation Miklos Szeredi
2012-09-20 18:55 ` [PATCH 08/13] fs: limit filesystem stacking depth Miklos Szeredi
2012-09-20 18:55 ` [PATCH 09/13] overlayfs: fix possible leak in ovl_new_inode Miklos Szeredi
2012-09-20 18:55 ` [PATCH 10/13] overlayfs: create new inode in ovl_link Miklos Szeredi
2012-09-20 18:55 ` [PATCH 11/13] vfs: export __inode_permission() to modules Miklos Szeredi
2012-09-20 18:55 ` [PATCH 12/13] ovl: switch to __inode_permission() Miklos Szeredi
2012-09-20 18:55 ` [PATCH 13/13] overlayfs: copy up i_uid/i_gid from the underlying inode Miklos Szeredi
2012-09-20 19:34 ` [PATCH 00/13] overlay filesystem: request for inclusion (v15) J. R. Okajima
2012-09-20 20:48 ` Miklos Szeredi
2012-09-20 21:30 ` J. R. Okajima
2012-09-23 13:02 ` Jan Engelhardt [this message]
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