Re: Dell Latitude 7400 - nvme0: Missing interrupt

Reply: Pavel Timofeev : "Re: Dell Latitude 7400 - nvme0: Missing interrupt"
Reply: Alexander Motin : "Re: Dell Latitude 7400 - nvme0: Missing interrupt"
In reply to: Warner Losh : "Re: Dell Latitude 7400 - nvme0: Missing interrupt"
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From: Warner Losh <imp_at_bsdimp.com>
Date: Tue, 12 Oct 2021 19:56:40 UTC
One piece of data that would be good to have:

nvmecontrol identify nvme0

There's an optional feature that none of my drives have, but that the Linux
driver does oddly
weird things when enabled. The output of that command will help me
understand if that may
be in play. Maybe we need to do oddly weird things too :)

Warner

On Sun, Oct 10, 2021 at 11:00 PM Warner Losh <imp@bsdimp.com> wrote:

>
>
> On Sun, Oct 10, 2021 at 10:48 PM Pavel Timofeev <timp87@gmail.com> wrote:
>
>> сб, 9 окт. 2021 г. в 14:59, Warner Losh <imp@bsdimp.com>:
>>
>>>
>>>
>>> On Sat, Oct 9, 2021, 8:44 AM Pavel Timofeev <timp87@gmail.com> wrote:
>>>
>>>>
>>>>
>>>> пт, 8 окт. 2021 г. в 14:49, Warner Losh <imp@bsdimp.com>:
>>>>
>>>>>
>>>>>
>>>>> On Fri, Oct 8, 2021 at 2:42 PM Pavel Timofeev <timp87@gmail.com>
>>>>> wrote:
>>>>>
>>>>>>
>>>>>>
>>>>>> сб, 21 авг. 2021 г. в 15:22, Warner Losh <imp@bsdimp.com>:
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Sat, Aug 21, 2021 at 3:06 PM Pavel Timofeev <timp87@gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>  Warner Losh <imp@bsdimp.com>:
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Fri, Aug 20, 2021 at 10:42 PM Pavel Timofeev <timp87@gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>>  Pavel Timofeev <timp87@gmail.com>:
>>>>>>>>>>
>>>>>>>>>> >
>>>>>>>>>> > Chuck Tuffli <ctuffli@gmail.com>:
>>>>>>>>>> >
>>>>>>>>>> >> On Mon, Aug 16, 2021 at 7:43 PM Pavel Timofeev <
>>>>>>>>>> timp87@gmail.com> wrote:
>>>>>>>>>> >> >
>>>>>>>>>> >> > Hello
>>>>>>>>>> >> > I've got a Dell Latitude 7400 and tried installing the latest
>>>>>>>>>> >> 14.0-CURRENT
>>>>>>>>>> >> > (main-n248636-d20e9e02db3) on it.
>>>>>>>>>> >> > Despite other things the weird one which concerns me is
>>>>>>>>>> >> >   nvme0: Missing interrupt
>>>>>>>>>> >> > message I get sometimes on the console.
>>>>>>>>>> >> > It seems like I get it only after the reboot of the laptop,
>>>>>>>>>> i. e. not
>>>>>>>>>> >> > getting that message if I power cycle the laptop, at least I
>>>>>>>>>> haven't
>>>>>>>>>> >> seen
>>>>>>>>>> >> > them for now in such cases.
>>>>>>>>>> >> > So when the laptop is rebooted I can't even take advantage of
>>>>>>>>>> >> > nvmecontrol(8) quickly.
>>>>>>>>>> >> > Well, it still works, but it takes tens of seconds to return
>>>>>>>>>> the output.
>>>>>>>>>> >> ...
>>>>>>>>>> >> > dmesg when power cycled -
>>>>>>>>>> >> >
>>>>>>>>>> https://drive.google.com/file/d/1dB27oB1O2CcnZy6DvOOhmFO8SN8V8SwJ
>>>>>>>>>> >> > dmesg when rebooted -
>>>>>>>>>> >> >
>>>>>>>>>> https://drive.google.com/file/d/1DsKTMkihp_OmUcirByLaVO4o2mU38Bxh
>>>>>>>>>> >>
>>>>>>>>>> >> I'm sort of curious about the time stamps for the log messages
>>>>>>>>>> in the
>>>>>>>>>> >> failing case. Something like:
>>>>>>>>>> >>
>>>>>>>>>> >> $ grep "nv\(me\|d\)" /var/log/messages
>>>>>>>>>> >>
>>>>>>>>>> >> --chuck
>>>>>>>>>> >>
>>>>>>>>>> >
>>>>>>>>>> > Well, I can't see timestamps in the verbose boot log. Am I
>>>>>>>>>> missing some
>>>>>>>>>> > configuration for that?
>>>>>>>>>> >
>>>>>>>>>> > $ grep "nv\(me\|d\)" /var/log/messages
>>>>>>>>>> > nvme0: <Generic NVMe Device> mem
>>>>>>>>>> >
>>>>>>>>>> 0xcc100000-0xcc103fff,0xcc105000-0xcc105fff,0xcc104000-0xcc104fff at device
>>>>>>>>>> > 0.0 on pci6
>>>>>>>>>> > nvme0: attempting to allocate 5 MSI-X vectors (17 supported)
>>>>>>>>>> > nvme0: using IRQs 133-137 for MSI-X
>>>>>>>>>> > nvme0: CapLo: 0x140103ff: MQES 1023, CQR, TO 20
>>>>>>>>>> > nvme0: CapHi: 0x00000030: DSTRD 0, NSSRS, CSS 1, MPSMIN 0,
>>>>>>>>>> MPSMAX 0
>>>>>>>>>> > nvme0: Version: 0x00010300: 1.3
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvme0: Missing interrupt
>>>>>>>>>> > nvd0: <PC611 NVMe SK hynix 512GB> NVMe namespace
>>>>>>>>>> > GEOM: new disk nvd0
>>>>>>>>>> > nvd0: 488386MB (1000215216 512 byte sectors)
>>>>>>>>>> >
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Ah, sorry, provided wrong output.
>>>>>>>>>> Here is what you requested:
>>>>>>>>>> $ grep "nv\(me\|d\)" /var/log/messages
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: <Generic NVMe Device> mem
>>>>>>>>>> 0xcc100000-0xcc103fff,0xcc105000-0xcc105fff,0xcc104000-0xcc104fff
>>>>>>>>>> at device
>>>>>>>>>> 0.0 on pci6
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: attempting to allocate 5
>>>>>>>>>> MSI-X
>>>>>>>>>> vectors (17 supported)
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: using IRQs 133-137 for
>>>>>>>>>> MSI-X
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: CapLo: 0x140103ff: MQES
>>>>>>>>>> 1023, CQR,
>>>>>>>>>> TO 20
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: CapHi: 0x00000030: DSTRD
>>>>>>>>>> 0, NSSRS,
>>>>>>>>>> CSS 1, MPSMIN 0, MPSMAX 0
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: Version: 0x00010300: 1.3
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: Missing interrupt
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: Missing interrupt
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvme0: Missing interrupt
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvd0: <PC611 NVMe SK hynix
>>>>>>>>>> 512GB> NVMe
>>>>>>>>>> namespace
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: GEOM: new disk nvd0
>>>>>>>>>> Aug 21 04:34:36 nostromo kernel: nvd0: 488386MB (1000215216 512
>>>>>>>>>> byte
>>>>>>>>>> sectors)
>>>>>>>>>> Aug 21 04:34:42 nostromo kernel: nvme0: Missing interrupt
>>>>>>>>>> Aug 21 04:35:36 nostromo kernel: nvme0: Missing interrupt
>>>>>>>>>> Aug 21 04:35:50 nostromo kernel: nvme0: Missing interrupt
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> What happens if you set hw.nvme.use_nvd=0 and
>>>>>>>>> hw.cam.nda.nvd_compat=1
>>>>>>>>> in the boot loader and reboot? Same thing except nda where nvd
>>>>>>>>> was? Or does
>>>>>>>>> it work?
>>>>>>>>>
>>>>>>>>> Something weird is going on in the interrupt assignment, I think,
>>>>>>>>> but I
>>>>>>>>> wanted to get any nvd vs nda issues out of the way first.
>>>>>>>>>
>>>>>>>>> Warner
>>>>>>>>>
>>>>>>>>
>>>>>>>> Do you mean kern.cam.nda.nvd_compat instead
>>>>>>>> of hw.cam.nda.nvd_compat?
>>>>>>>> kern.cam.nda.nvd_compat is 1 by default now.
>>>>>>>>
>>>>>>>> So I tried to set  hw.nvme.use_nvd to 1 as suggested, but I still
>>>>>>>> see
>>>>>>>>   nvme0: Missing interrupt
>>>>>>>> and now also
>>>>>>>>   Root mount waiting for: CAM
>>>>>>>> messages besides those
>>>>>>>>
>>>>>>>
>>>>>>> OK. That all makes sense. I'd forgotten that nvd_compat=1 by default
>>>>>>> these
>>>>>>> days.
>>>>>>>
>>>>>>> I'll take a look on monday starting at the differences in interrupt
>>>>>>> assignment that
>>>>>>> are apparent when you cold boot vs reboot.
>>>>>>>
>>>>>>> Thanks for checking... I'd hoped this was a cheap fix, but also
>>>>>>> didn't really
>>>>>>> expect it to be.
>>>>>>>
>>>>>>> Warner
>>>>>>>
>>>>>>>
>>>>>> I've recently upgraded to main-n249974-17f790f49f5 and it got even
>>>>>> worse now.
>>>>>> So clean poweron works as before.
>>>>>> But if rebooted nvme drive refuses to work, while before the code
>>>>>> upgrade it was just complaining about missing interrupts.
>>>>>>
>>>>>> currently dmesg show this:
>>>>>> nvme0: <Generic NVMe Device> mem
>>>>>> 0xcc100000-0xcc103fff,0xcc105000-0xcc105fff,0xcc104000-0xcc104fff at device
>>>>>> 0.0 on pci6
>>>>>> nvd0: <PC611 NVMe SK hynix 512GB> NVMe namespace
>>>>>> nvd0: 488386MB (1000215216 512 byte sectors)
>>>>>> nvme0: <Generic NVMe Device> mem
>>>>>> 0xcc100000-0xcc103fff,0xcc105000-0xcc105fff,0xcc104000-0xcc104fff at device
>>>>>> 0.0 on pci6
>>>>>>
>>>>>
>>>>> Why is this showing up twice? Or is everything above this line left
>>>>> over from the first, working boot?
>>>>>
>>>>>
>>>>>> nvme0: RECOVERY_START 9585870784 vs 9367036288
>>>>>> nvme0: timeout with nothing complete, resetting
>>>>>> nvme0: Resetting controller due to a timeout.
>>>>>> nvme0: RECOVERY_WAITING
>>>>>> nvme0: resetting controller
>>>>>> nvme0: aborting outstanding admin command
>>>>>> nvme0: IDENTIFY (06) sqid:0 cid:15 nsid:0 cdw10:00000001
>>>>>> cdw11:00000000
>>>>>> nvme0: ABORTED - BY REQUEST (00/07) sqid:0 cid:15 cdw0:0
>>>>>> nvme0: nvme_identify_controller failed!
>>>>>> nvme0: waiting
>>>>>>
>>>>>
>>>>> Clearly something bad is going on with the drive here... We looked
>>>>> into the completion queues when we didn't get an interrupt and there was
>>>>> nothing complete there....
>>>>>
>>>>> The only thing I can think of is that this means there's a phase error
>>>>> between the drive and the system. I recently removed a second reset and
>>>>> made it an option NVME_2X_RESET. Can you see if adding
>>>>> 'options NVME_2X_RESET' to your kernel config fixes this?
>>>>>
>>>>> Warner
>>>>>
>>>>>
>>>>>> nvme0: <Generic NVMe Device> mem
>>>>>> 0xcc100000-0xcc103fff,0xcc105000-0xcc105fff,0xcc104000-0xcc104fff at device
>>>>>> 0.0 on pci6
>>>>>> nvme0: RECOVERY_START 9362778467 vs 9361830561
>>>>>> nvme0: timeout with nothing complete, resetting
>>>>>> nvme0: Resetting controller due to a timeout.
>>>>>> nvme0: RECOVERY_WAITING
>>>>>> nvme0: resetting controller
>>>>>> nvme0: aborting outstanding admin command
>>>>>> nvme0: IDENTIFY (06) sqid:0 cid:15 nsid:0 cdw10:00000001
>>>>>> cdw11:00000000
>>>>>> nvme0: ABORTED - BY REQUEST (00/07) sqid:0 cid:15 cdw0:0
>>>>>> nvme0: nvme_identify_controller failed!
>>>>>> nvme0: waiting
>>>>>>
>>>>>>
>>>>
>>>> Sorry, it's showing twice due to multiple reboots. For one boot it's
>>>> like:
>>>> nvme0: <Generic NVMe Device> mem
>>>> 0xcc100000-0xcc103fff,0xcc105000-0xcc105fff,0xcc104000-0xcc104fff at device
>>>> 0.0 on pci6
>>>> nvme0: RECOVERY_START 9633303481 vs 9365971423
>>>> nvme0: timeout with nothing complete, resetting
>>>> nvme0: Resetting controller due to a timeout.
>>>> nvme0: RECOVERY_WAITING
>>>> nvme0: resetting controller
>>>> nvme0: aborting outstanding admin command
>>>> nvme0: IDENTIFY (06) sqid:0 cid:15 nsid:0 cdw10:00000001 cdw11:00000000
>>>> nvme0: ABORTED - BY REQUEST (00/07) sqid:0 cid:15 cdw0:0
>>>> nvme0: nvme_identify_controller failed!
>>>> nvme0: waiting
>>>>
>>>> Well, neither Windows not Linux have any problems with the device. I
>>>> understand they may be hiding it or workaround somehow.
>>>>
>>>
>>> Yea, I'm trying to figure out why your machine is different than mine,
>>> and what Windows or Linux do that is different. It may be dodgy hardware,
>>> but others have no trouble...
>>>
>>> I'll try setting NVME_2X_RESET in the kernel config and report back in a
>>>> while.
>>>>
>>>
>>> Thanks. If it helps, that tells me something. If it doesn't, that tells
>>> me something else.
>>>
>>> I suspect that it is somewhere else in the system, tbh, but I need to
>>> find it systematically.
>>>
>>> Warner
>>>
>>
>> Surprisingly, setting NVME_2X_RESET in the kernel config hasn't changed
>> anything. I. e it didn't help.
>>
>
> While it would have been nice to have this be the fix, I'm not that
> surprised either.
> It was the biggest change of late, apart from the big re-arrangement that
> I'd done.
>
> So the other changes have moved from the occasional missing interrupt
> message
> (which the old code would get when a command wasn't completed in the
> timeout
> period, but that we found to be done when we scanned the completion queue.
> Now
> the device is detected fine (as before), but then doesn't do I/O at all
> (including not
> completing the identify command!) and is worse. This is unexpected and I'm
> trying
> understand what happens on reboot that 'changes'the working state and why
> the
> new code behaves so differently.
>
> Warner
>