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From: "Meneghini, John" <>
To: Keith Busch <>
Cc: Jen Axboe <>, Sagi Grimberg <>,
	"" <>,
	"" <>,
	Hannes Reinecke <>, Christoph Hellwig <>,
	"Knight,  Frederick" <>,
	"Meneghini, John" <>
Subject: Re: [PATCH] nvme: Add support for ACRE Command Interrupted status
Date: Wed, 27 Nov 2019 19:22:18 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 11/27/19, 2:09 PM, "Keith Busch" <> wrote:
    >> It wasn't my intention to turn NVME_SC_CMD_INTERRUPTED into non-path related error.
    >> The goal was to make the command retry after CDR on the same controller.  So why
    >> does this patch change the meaning of BLK_STS_RESOURCE?
    > What I meant by a "non-path error" is that those types of errors for
    > nvme go through the "normal" requeuing that checks CRD. The failover
    > requeuing does not check CRD. But thinking again, I don't see why the
    > failover side can't also be CRD aware.

Yes, the failover side can be CRD aware, but I don't see the point in failing
over to a different path when CRD is set.  As you said, this isn't a pathing

We can argue about whether the command is retried on the current controller
or a different controller, but CRD must be observed before the command is retried.



linux-nvme mailing list

  reply	other threads:[~2019-11-27 19:22 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-26 13:36 [PATCH] nvme: Add support for ACRE Command Interrupted status Hannes Reinecke
2019-11-26 14:48 ` George, Martin
2019-11-26 16:05 ` Keith Busch
2019-11-26 16:24   ` Christoph Hellwig
2019-11-27 15:29     ` Meneghini, John
2019-11-27 19:08       ` Keith Busch
2019-11-27 19:22         ` Meneghini, John [this message]
2019-11-26 16:32   ` Hannes Reinecke
2019-11-27 17:17     ` Meneghini, John

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