Date: Fri, 21 Jun 2013 12:33:30 -0400
From: David Teigland <teigland@redhat.com>
To: Kent Overstreet <koverstreet@google.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>, akpm@linux-foundation.org,
        tj@kernel.org, axboe@kernel.dk, nab@linux-iscsi.org, bcrl@kvack.org,
        linux-kernel@vger.kernel.org, Stephen Rothwell <sfr@canb.auug.org.au>,
        Fengguang Wu <fengguang.wu@intel.com>
Subject: Re: [PATCH 03/10] idr: Rewrite ida
Message-ID: <20130621163330.GA6503@redhat.com>
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On Wed, Jun 19, 2013 at 04:38:36PM -0700, Kent Overstreet wrote:
> On Wed, Jun 19, 2013 at 10:40:22AM +0100, Steven Whitehouse wrote:
> > Millions of IDs is something that is fairly normal for DLM, since there
> > will be two DLM locks per cached inode with GFS2 and people tend to use
> > it on pretty large servers with lots of memory,
> 
> Thanks, I wasn't aware of that. Is the 31 bits for the id limitation an
> issue for you? While I'm at changing ids to longs should be fairly
> trivial.

There is a dlm_lkb struct in memory for each id, so 31 bits will not
be a problem.
Dave

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