linux-kernel - Re: [GIT PULL] Ceph updates for 3.8

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Message-ID: <20130102175610.GA25274@fieldses.org>
Date:	Wed, 2 Jan 2013 12:56:10 -0500
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Sage Weil <sage@...tank.com>
Cc:	torvalds@...ux-foundation.org, ceph-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] Ceph updates for 3.8

On Fri, Dec 21, 2012 at 10:59:55AM -0800, Sage Weil wrote:
> On Fri, 21 Dec 2012, J. Bruce Fields wrote:
> > On Thu, Dec 20, 2012 at 01:29:49PM -0800, Sage Weil wrote:
> > > Hi Linus,
> > > 
> > > Please pull the following Ceph updates for 3.8 from
> > > 
> > >   git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git for-linus
> > > 
> > > There's a trivial conflict in net/ceph/osd_client.c dealing with rbtree 
> > > node initialization; the resolution is to keep the RB_CLEAR_NODE() call 
> > > (see 4c199a93 for the conflicting commit).
> > > 
> > > There are a few different groups of commits here.  The largest is Alex's 
> > > ongoing work to enable the coming RBD features (cloning, striping).  
> > > There is some cleanup in libceph that goes along with it.  Cyril and David 
> > > have fixed some problems with NFS reexport (leaking dentries and page 
> > > locks),
> > 
> > Just out of curiosity--what's the state of NFS exports now?
> > 
> > I seem to recall initially it was sort-of supported by filehandle
> > lookups didn't really work reliably?
> 
> That hasn't changed yet... if you miss both the client and MDS caches you 
> get ESTALE.  The MDS cache is big, so this works okay for casual use, but 
> it's not great.  This should be fixed on the server side of things for the 
> next major release (cuttlefish).  The client code shouldn't need to 
> change.

OK, thanks for the update.

--b.
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