linux-kernel - Re: [PATCH] nvme-pci: do not set the NUMA node of device if it has none

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Message-ID: <20240723143937.GA20891@lst.de>
Date: Tue, 23 Jul 2024 16:39:37 +0200
From: Christoph Hellwig <hch@....de>
To: Maurizio Lombardi <mlombard@...hat.com>
Cc: Pratyush Yadav <ptyadav@...zon.de>, Keith Busch <kbusch@...nel.org>,
	Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@....de>,
	Sagi Grimberg <sagi@...mberg.me>, linux-nvme@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme-pci: do not set the NUMA node of device if it has
 none

On Tue, Jul 23, 2024 at 11:49:24AM +0200, Maurizio Lombardi wrote:
> FYI, we have received bug reports because of this patch.
> All single numa nodes like a VMware guest or a system set to interleaved mode
> will now see -1 as the numa_node attribute.
> 
> Apparently, some applications like Lightbits do not expect to see -1.

But they can see the same for all kinds of other devices.  I can't see
how we could cater to this kind of behavior..