Date: Thu, 7 May 2015 09:26:02 +0200
From: Christoph Hellwig <hch@lst.de>
To: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Christoph Hellwig <hch@lst.de>, linux-nvdimm@ml01.01.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        x86@kernel.org, boaz@plexistor.com, axboe@kernel.dk
Subject: Re: [PATCH 1/3] pmem: Initial version of persistent memory driver
Message-ID: <20150507072602.GA23239@lst.de>
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On Mon, May 04, 2015 at 10:43:01AM -0600, Ross Zwisler wrote:
> > Yes, if CONFIG_DEBUG_BLOCK_EXT_DEVT isn't set that code doesn't work at all.
> 
> I can't figure out a use case that breaks when using dynamically allocated
> minors without CONFIG_DEBUG_BLOCK_EXT_DEVT.  The patch that I've been testing
> against is at the bottom of this mail.
> 
> Here are the minors that I get when creating a bunch of partitions using the
> current code with PMEM_MINORS=16, with CONFIG_DEBUG_BLOCK_EXT_DEVT turned off:

FYI, your patch below works fine for me, but the original one certainly
didn't.  One big difference was that it also removed the register_blkdev
call and thus assigning a major number.
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