linux-kernel - Re: [PATCH] nvme: Don't fail to resume if NSIDs change

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Date:   Tue, 1 Aug 2023 06:30:52 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     Christoph Hellwig <hch@....de>
Cc:     August Wikerfors <git@...ustwikerfors.se>,
        Keith Busch <kbusch@...nel.org>, axboe@...com,
        sagi@...mberg.me, linux-nvme@...ts.infradead.org,
        linux-kernel@...r.kernel.org, nilskruse97@...il.com,
        David.Chang@....com
Subject: Re: [PATCH] nvme: Don't fail to resume if NSIDs change

On 8/1/23 06:24, Christoph Hellwig wrote:
> On Mon, Jul 31, 2023 at 03:14:54PM -0500, Limonciello, Mario wrote:
>>> No.  There are tons of NVMe devices that only support creating and
>>> deleting namespace out of band, especially in virtualized and cloud
>>> setups.
>>
>> Even if it's only the error handling path only that it's checked?
> 
> Do you mean nvme_validate_ns with the error code?  I wouldn't really call
> that an error case, that's the function called to check namespaces are
> still the same after we did a rescan (either manually or triggered by the
> AEN).
> 
>> If you don't want more changes or heuristics on the error handling path for
>> this case, I think the best solution is probably to pick up
>>
>> https://lore.kernel.org/all/20221116171727.4083-1-git@augustwikerfors.se/t/
>>
>> instead then and hopefully we don't end up with more disks like this.
> 
> That's probably the better idea.  I know at least one of the early
> quirked devices also IDs that changed for subsequent identify calls.

Do you want that re-sent?  Or can you just pick up from that lore link?