From mboxrd@z Thu Jan  1 00:00:00 1970
From: hch@infradead.org (Christoph Hellwig)
Date: Wed, 14 Oct 2015 09:50:31 -0700
Subject: [PATCH v6 05/11] block: remove split code in
 blkdev_issue_{discard,write_same}B
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Message-ID: <20151014165031.GA32274@infradead.org>

On Wed, Oct 14, 2015@04:38:50PM +0000, Keith Busch wrote:
> I see why the proposal is an improvement, but I don't understand why the
> current situation results in a hang. Are we missing some kind of error
> recovery in the driver?

The driver tries to abort the commands and eventually gets into a death
spiral.  I'm still trying to understand what exactly is going on.