From: Keith Busch <kbusch@kernel.org>
To: "Rao, Vinay" <Vinay.Rao@dell.com>
Cc: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>,
"Belanger, Martin" <Martin.Belanger@dell.com>,
"Hayes, Stuart" <Stuart.Hayes@dell.com>,
"Tarikere, Madhu" <Madhu.Tarikere@dell.com>,
Christoph Hellwig <hch@lst.de>,
Martin Belanger <nitram_67@hotmail.com>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"axboe@fb.com" <axboe@fb.com>,
"sagi@grimberg.me" <sagi@grimberg.me>
Subject: Re: [PATCH 1/1] nvme-fabrics: Generate uevent on namespace AENs
Date: Fri, 30 Apr 2021 09:21:04 -0700 [thread overview]
Message-ID: <20210430162104.GA907317@dhcp-10-100-145-180.wdc.com> (raw)
In-Reply-To: <BYAPR19MB29351987D7ABBA3F28791D978F5E9@BYAPR19MB2935.namprd19.prod.outlook.com>
On Fri, Apr 30, 2021 at 05:14:55AM +0000, Rao, Vinay wrote:
> + Madhu
>
> Hi Chaitanya,
>
> Some of the AEN's like ANA state change and Name Space attribute change events are of interest outside the NVME driver.
>
> It would be good to consider these events to be propagated up to user space. I am not yet convinced on how propagating this above to user space is problematic.
The namespace attribute change event pairs with the Changed Namespace
List log, and reading that log will change the result for a subsequent
reader. User space racing with the kernel on a log access when there are
read side effects creates non-deterministic behavior, and that is
problematic.
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next prev parent reply other threads:[~2021-04-30 16:21 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-28 20:18 [PATCH 1/1] nvme-fabrics: Generate uevent on namespace AENs Martin Belanger
2021-04-29 1:18 ` Chaitanya Kulkarni
2021-04-29 1:24 ` Chaitanya Kulkarni
2021-04-29 6:30 ` Christoph Hellwig
2021-04-29 16:58 ` Belanger, Martin
2021-04-29 18:22 ` Chaitanya Kulkarni
2021-04-30 5:14 ` Rao, Vinay
2021-04-30 16:21 ` Keith Busch [this message]
2021-05-03 6:52 ` Christoph Hellwig
2021-05-03 7:20 ` Rao, Vinay
2021-05-03 23:20 ` Chaitanya Kulkarni
2021-05-03 23:21 ` Chaitanya Kulkarni
2021-05-04 8:32 ` Rao, Vinay
2021-05-11 8:53 ` Rao, Vinay
2021-06-16 10:38 ` Rao, Vinay
2021-06-24 9:10 ` Hannes Reinecke
2021-06-24 9:17 ` Hannes Reinecke
2021-06-24 10:49 ` Hannes Reinecke
2021-06-30 14:00 ` Rao, Vinay
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