Date: Thu, 7 Dec 2023 16:07:39 -0800 From: Bakul Shah <bakul@iitbombay.org> To: Warner Losh <imp@bsdimp.com> Cc: Tomoaki AOKI <junchoon@dec.sakura.ne.jp>, freebsd-current@freebsd.org Subject: Re: nvme timeout issues with hardware and bhyve vm's Message-ID: <10FD2FC6-1F39-4F7D-8BA8-976ADC0AE37A@iitbombay.org> In-Reply-To: <CANCZdfpN=GwJQT%2BrK=TMUj6niajw-0C=957gV655s2FqJ79nKw@mail.gmail.com> 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> <CANCZdfpN=GwJQT%2BrK=TMUj6niajw-0C=957gV655s2FqJ79nKw@mail.gmail.com>
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On Dec 7, 2023, at 3:59=E2=80=AFPM, Warner Losh <imp@bsdimp.com> wrote: >=20 >=20 > *Overheating caused hang of NVMe controller or PCI bridge on SSD, or >=20 > Yes. Most drive's firmware when it overheats resets. There might be = something > that the pci code can do when this happens to retrain the link, = reprogram the > config registers, etc. How quickly can the device heat up? Can it be queried frequently enough act before it overheats by throttling io?
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