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Date: Fri, 28 Nov 2008 21:49:21 +0530 From: Bharata B Rao <bharata@...ux.vnet.ibm.com> To: Miklos Szeredi <miklos@...redi.hu> Cc: linux-fsdevel@...r.kernel.org, jblunck@...e.de, dlezcano@...ibm.com, linux-kernel@...r.kernel.org, viro@...IV.linux.org.uk Subject: Re: [rfc git patch] union directory On Fri, Nov 28, 2008 at 12:01:32PM +0100, Miklos Szeredi wrote: > I've been doing some small fixing/cleanup work on the union directory > patches by Jan, and just noticed there's a thread about the union > mounts on LKML, so I thought publicizing won't hurt. Interesting that you call it "union directory", do you have plans to go the Plan 9's way of union directories ? > > It's still a work in progress, notably the readdir code currently only > works on a few specific filesystem types. readdir was one of the things on which we couldn't reach a consensus on how to do it the right way. We were suggested that we move the duplicate elimination into user space and an effort towards this was also done (Ref: http://lkml.org/lkml/2008/4/29/248) by moving this to glibc readdir. But we weren't sure how this could work for NFS and were told that it is required to get the NFS side of things sorted out first. So that's where readdir effort stands now afaik. Do you have any ideas/plans on this front ? Also the last development activity that I am aware of was done towards getting a generic whiteout support. David Woodhouse started a git tree at one point of time for whiteout support (git://git.infradead.org/union/whiteout-2.6.git). Erez Zodak was infact looking forward for these changes to make use of them in Unionfs, but even this effort died down. Nice to know that you have started looking into Union Mount patches. Would be interesting to know/understand your plans/thoughts on taking this effort forward. Regards, Bharata. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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