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Date:      Thu, 7 Dec 2023 15:16:51 -0800
From:      Craig Leres <leres@freebsd.org>
To:        Tomoaki AOKI <junchoon@dec.sakura.ne.jp>, freebsd-current@freebsd.org
Subject:   Re: nvme timeout issues with hardware and bhyve vm's
Message-ID:  <60642a1e-1603-495f-a2d3-5f3d3c82e474@freebsd.org>
In-Reply-To: <20231208080929.cfd9fca421fea81d89d2380b@dec.sakura.ne.jp>
References:  <90d3e532-8ea7-4eea-8e31-8c363285a156@nomadlogic.org> <CANCZdfrQTd3F-j81HsamUCJG4DyUk_-yPOtbZY4Q926_ihatsQ@mail.gmail.com> <0ad493d5-1c1e-4370-977a-118f46ebd677@nomadlogic.org> <CANCZdfrwzmZ=iHj_vm2nsi72ceRQ81KY5DjiuML3udEaWTBanA@mail.gmail.com> <0c4f8149-89dd-4635-a5ed-4766fffd2553@nomadlogic.org> <CANCZdfpgw_sm4couYx9%2Bcgp-q_2jmPC2Q7TSeD9Yb3VYoiDQhQ@mail.gmail.com> <ec08484d-b49f-4aa3-adf4-b96570083b9c@nomadlogic.org> <20231208080929.cfd9fca421fea81d89d2380b@dec.sakura.ne.jp>

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On 12/7/23 15:09, Tomoaki AOKI wrote:
> If I myself encounter this kind of problem ON BARE METAL HARDWARE,
> I would usually suspect
> 
>   *Overheating caused hang of NVMe controller or PCI bridge on SSD, or

This would also be my first guess.

Five years ago I had an nmve in an intel nuc that would sometimes "go to 
sleep", here's the thread

 
https://lists.freebsd.org/pipermail/freebsd-hackers/2018-May/052783.html

@imp helpfully suggested running "nvmecontrol logpage -p 2 nvme0" which 
showed mine was hot (60° C/140° F)! I adjusted the fan settings in the 
bios and have never had an issue since.

		Craig



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