Date: Thu, 1 Jun 2017 15:28:18 +0300
From: Rakesh Pandit <rakesh@tuxera.com>
To: Christoph Hellwig <hch@lst.de>
CC: Sagi Grimberg <sagi@grimberg.me>, <linux-nvme@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, Jens Axboe <axboe@fb.com>,
        Keith Busch <keith.busch@intel.com>, Andy Lutomirski <luto@kernel.org>
Subject: Re: [PATCH V2] nvme: fix nvme_remove going to uninterruptible sleep
 for ever
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On Thu, Jun 01, 2017 at 01:43:38PM +0200, Christoph Hellwig wrote:
> On Tue, May 30, 2017 at 05:23:46PM +0300, Rakesh Pandit wrote:
> > We can fix user-space triggered set_features higger up e.g. in
> > nvme_ioctl by putting same check.  Introduction of a separate state
> > NVME_CTRL_SCHED_RESET (being discussed in another thread) has
> > additional advantage of making sure that only one thread is going
> > through resetting and eventually through removal (if required) and
> > solves lot of problems.
> 
> I think we need the NVME_CTRL_SCHED_RESET state.  In fact I'm pretty
> sure some time in the past I already had it in a local tree as a
> generalization of rdma and loop already use NVME_CTRL_RESETTING
> (they set it before queueing the reset work).
>
> But I don't fully understand how the NVME_CTRL_SCHED_RESET fix is
> related to this patch?

They aren't related.  Sorry for confusion.  I intended to answer
another thread but instead wrote it here.