linux-kernel - Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing [try #13]

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Date:	Sat, 02 Sep 2006 12:11:12 +0800
From:	Ian Kent <raven@...maw.net>
To:	Andrew Morton <akpm@...l.org>
Cc:	Trond Myklebust <trond.myklebust@....uio.no>,
	David Howells <dhowells@...hat.com>, torvalds@...l.org,
	steved@...hat.com, linux-fsdevel@...r.kernel.org,
	linux-cachefs@...hat.com, nfsv4@...ux-nfs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock
	sharing [try #13]

On Fri, 2006-09-01 at 19:50 -0700, Andrew Morton wrote:
> On Fri, 01 Sep 2006 13:00:44 -0400
> Trond Myklebust <trond.myklebust@....uio.no> wrote:
> 
> > On Fri, 2006-09-01 at 09:34 -0700, Andrew Morton wrote:
> > 
> > > nfs automounter submounts are still broken in Trond's tree, btw.  Are we stuck?
> > 
> > You mean autofs indirect maps?
> 
> I don't know that that is.
> 
> > I'll see if I can't get my hands on an selinux setup like yours in order
> > to do some debugging. AFAICS, the non-selinux case works fine, though.
> 
> It doesn't appear to be related to selinux.
> 
> On a stock, mostly-up-to-date FC5 installation:
> 
> 	echo 0 > /selinux/enforce
> 	service autofs stop
> 	service nfs stop
> 	service nfs start
> 	service autofs start
> 
> 
> sony:/home/akpm> ls -l /net/bix/usr/src
> total 0
> 
> sony:/home/akpm> showmount -e bix
> Export list for bix:
> /           *
> /usr/src    *
> /mnt/export *
> 
> 
> The automounter will mount bix:/ on /net/bix.  But I am unable to get it to
> mount bix's /usr/src on /net/bix/usr/src.

Is it the same symptom as before or is it that bix:/usr/src is not also
being mounted?

> Without git-nfs applied, /net/bix/usr/src mounts as expected.
> 
> iirc, we decided this is related to the fs-cache infrastructure work which
> went into git-nfs.  I think David can reproduce this?

I'll build the latest mm kernel and try to reproduce it.
>>From memory I couldn't reproduce it last time I tried.
Is there anything I need to add to rc5-mm1 for this?

Ian



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