archive mirror
 help / color / mirror / Atom feed
From: Christoph Hellwig <>
To: Jens Axboe <>
Cc: "Ahmed S. Darwish" <>,
	Keith Busch <>,, Sagi Grimberg <>,
	Chaitanya Kulkarni <>,
Subject: Re: v5.9-rc1 commit reliably breaks pci nvme detection
Date: Thu, 20 Aug 2020 18:12:14 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, Aug 20, 2020 at 11:10:58AM -0600, Jens Axboe wrote:
> To be fair, I've only heard this one complaint about it, so hopefully it's
> not too widespread. I'm on an x86-64 laptop myself with nvme, and it works
> just fine :-)

The cause for this is the weird NVMe of by ones, where 0 in a field
means 1.  So for the overflow to happen you need a controller that
supports USHORT_MAX queue entries.  Which don't seem to be all that

  reply	other threads:[~2020-08-20 17:12 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-17 13:50 v5.9-rc1 commit reliably breaks pci nvme detection Ahmed S. Darwish
2020-08-17 15:56 ` Keith Busch
2020-08-17 15:58   ` Jens Axboe
2020-08-20 15:35     ` Jens Axboe
2020-08-20 17:07       ` Ahmed S. Darwish
2020-08-20 17:10         ` Jens Axboe
2020-08-20 17:12           ` Christoph Hellwig [this message]
2020-08-20 17:14             ` Jens Axboe
2020-08-21  7:28             ` John Garry

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).