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Date: Wed, 13 Jul 2011 11:49:15 +0200 From: Miklos Szeredi <miklos@...redi.hu> To: Michal Suchanek <hramrach@...trum.cz> Cc: Ian Kent <ikent@...hat.com>, Peter Zijlstra <peterz@...radead.org>, David Howells <dhowells@...hat.com>, Ric Wheeler <rwheeler@...hat.com>, Alexander Viro <aviro@...hat.com>, Christoph Hellwig <hch@...radead.org>, Ingo Molnar <mingo@...e.hu>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, Jeff Moyer <jmoyer@...hat.com> Subject: Re: Union mount and lockdep design issues Michal Suchanek <hramrach@...trum.cz> writes: > You can still do > > mount --bind /lower1 /lower2/lower1 > mount --bind /lower2 /lower1/lower2 > > Which is technically not against usage guidelines, unlike mount --bind > /upper /lower1/upper Overlayfs will take the directory you specify as upperdir and lowerdir and will clone those mounts internally. This means that any present or future submounts are ignored and the mount containting those directories may be moved or umounted and overlayfs will still function. None of the bind mounts above will have any effect on an overlayfs that uses /lower[12] and /upper. > If crossing mount boundaries is forbidden try with symlinks or hardlinks. I'm not sure what you mean here. Thanks, Miklos -- 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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