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Date: Wed, 7 Oct 2026 15:29:05 +0200
From: Christoph Hellwig <hch@lst.de>
To: Damien Le Moal <dlemoal@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>, linux-block@vger.kernel.org,
	Christoph Hellwig <hch@lst.de>, linux-scsi@vger.kernel.org,
	"Martin K . Petersen" <martin.petersen@oracle.com>
Subject: Re: [PATCH v3 1/7] block: fail reads to offline zones early
Message-ID: <20261007132905.GA31906@lst.de>
References: <20261007082344.1049179-1-dlemoal@kernel.org> <20261007082344.1049179-2-dlemoal@kernel.org>
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On Wed, Oct 07, 2026 at 05:23:38PM +0900, Damien Le Moal wrote:
> Any BIO targeting an offline zone of a zoned block device will fail,
> including read commands. So there is no point in issuing read BIOs.
> Fail these read operations early if we ever see one.

Sashiko things this can race with zone updates.  Which is real, at least
sorta.  Maybe we should just do this in the drivers instead where we
are under freeze protection?  A bit uglier due to duplication, but not
really any more complicated.  And drivers right now would basically
just be sd and zloop anyway.