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Date: Thu, 19 Dec 2024 06:55:18 +0100
From: Christoph Hellwig <hch@lst.de>
To: Damien Le Moal <dlemoal@kernel.org>
Cc: Bart Van Assche <bvanassche@acm.org>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	Christoph Hellwig <hch@lst.de>
Subject: Re: Zoned storage and BLK_STS_RESOURCE
Message-ID: <20241219055518.GA19133@lst.de>
References: <e75812ec-9b91-42d0-9ca5-d4bae031e319@acm.org> <ed186d84-1652-4446-8da1-df2ed0d21566@kernel.org> <ba8caf98-8b09-4494-add8-31381b04cd33@acm.org> <3bc4b958-73ea-47d4-9b94-299db1f7ee3e@kernel.org> <955aacae-7dde-41a2-8eb9-3bbeae8c3d18@acm.org> <5534fce5-4fe3-4979-bb04-5cbddf613d0d@kernel.org>
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On Tue, Dec 17, 2024 at 06:56:16AM -0800, Damien Le Moal wrote:
> On 2024/12/16 13:22, Bart Van Assche wrote:
> > On 12/16/24 12:54 PM, Damien Le Moal wrote:
> >> Yes. But I am still confused. Where is the problem ?
> > 
> > Here: 
> > https://lore.kernel.org/linux-block/95ab028e-6cf7-474e-aa33-37ab3bccd078@kernel.org/. 
> > In that message another approach is
> > suggested than what I described in my previous message.
> 
> OK. So you are talking about an issue that potentially can happen *if* you
> modify zone write plugging to issue more than one write at a time per zone. This
> issue of reordering cannot happen today as there is always at most one write per
> zone in-flight.

Let me throw in the reminder that every experiment at forcing order
has failed and I'm still more than just skeptical of Bart's hack.