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From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
	Mario Limonciello <Mario.Limonciello@dell.com>,
	Keith Busch <kbusch@kernel.org>,
	Keith Busch <keith.busch@intel.com>,
	Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
	linux-nvme <linux-nvme@lists.infradead.org>,
	Linux PM <linux-pm@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Rajat Jain <rajatja@google.com>
Subject: Re: [Regression] Commit "nvme/pci: Use host managed power state for suspend" has problems
Date: Mon, 5 Aug 2019 23:28:58 +0200	[thread overview]
Message-ID: <CAJZ5v0g_yAP=zgYDXtJWtwceQp4wWPWFghDDD0opdZ4zT-yo5Q@mail.gmail.com> (raw)
In-Reply-To: <1FA3D56B-80C6-496C-8772-2F773AA8043C@canonical.com>

On Mon, Aug 5, 2019 at 9:14 PM Kai-Heng Feng
<kai.heng.feng@canonical.com> wrote:
>
> at 19:04, Rafael J. Wysocki <rafael@kernel.org> wrote:
>
> > On Fri, Aug 2, 2019 at 12:55 PM Kai-Heng Feng
> > <kai.heng.feng@canonical.com> wrote:
> >> at 06:26, Rafael J. Wysocki <rafael@kernel.org> wrote:
> >>
> >>> On Thu, Aug 1, 2019 at 9:05 PM <Mario.Limonciello@dell.com> wrote:
> >>>>> -----Original Message-----
> >>>>> From: Rafael J. Wysocki <rafael@kernel.org>
> >>>>> Sent: Thursday, August 1, 2019 12:30 PM
> >>>>> To: Kai-Heng Feng; Keith Busch; Limonciello, Mario
> >>>>> Cc: Keith Busch; Christoph Hellwig; Sagi Grimberg; linux-nvme; Linux
> >>>>> PM; Linux
> >>>>> Kernel Mailing List; Rajat Jain
> >>>>> Subject: Re: [Regression] Commit "nvme/pci: Use host managed power
> >>>>> state for
> >>>>> suspend" has problems
> >>>>>
> >>>>>
> >>>>> [EXTERNAL EMAIL]
> >>>>>
> >>>>> On Thu, Aug 1, 2019 at 11:06 AM Kai-Heng Feng
> >>>>> <kai.heng.feng@canonical.com> wrote:
> >>>>>> at 06:33, Rafael J. Wysocki <rafael@kernel.org> wrote:
> >>>>>>
> >>>>>>> On Thu, Aug 1, 2019 at 12:22 AM Keith Busch <kbusch@kernel.org>
> >>>>>>> wrote:
> >>>>>>>> On Wed, Jul 31, 2019 at 11:25:51PM +0200, Rafael J. Wysocki wrote:
> >>>>>>>>> A couple of remarks if you will.
> >>>>>>>>>
> >>>>>>>>> First, we don't know which case is the majority at this point.  For
> >>>>>>>>> now, there is one example of each, but it may very well turn out
> >>>>>>>>> that
> >>>>>>>>> the SK Hynix BC501 above needs to be quirked.
> >>>>>>>>>
> >>>>>>>>> Second, the reference here really is 5.2, so if there are any
> >>>>>>>>> systems
> >>>>>>>>> that are not better off with 5.3-rc than they were with 5.2,
> >>>>>>>>> well, we
> >>>>>>>>> have not made progress.  However, if there are systems that are
> >>>>>>>>> worse
> >>>>>>>>> off with 5.3, that's bad.  In the face of the latest findings the
> >>>>>>>>> only
> >>>>>>>>> way to avoid that is to be backwards compatible with 5.2 and that's
> >>>>>>>>> where my patch is going.  That cannot be achieved by quirking all
> >>>>>>>>> cases that are reported as "bad", because there still may be
> >>>>>>>>> unreported ones.
> >>>>>>>>
> >>>>>>>> I have to agree. I think your proposal may allow PCI D3cold,
> >>>>>>>
> >>>>>>> Yes, it may.
> >>>>>>
> >>>>>> Somehow the 9380 with Toshiba NVMe never hits SLP_S0 with or without
> >>>>>> Rafael’s patch.
> >>>>>> But the “real” s2idle power consumption does improve with the patch.
> >>>>>
> >>>>> Do you mean this patch:
> >>>>>
> >>>>> https://lore.kernel.org/linux-pm/70D536BE-8DC7-4CA2-84A9-
> >>>>> AFB067BA520E@canonical.com/T/#m456aa5c69973a3b68f2cdd4713a1ce83be5145
> >>>>> 8f
> >>>>>
> >>>>> or the $subject one without the above?
> >>>>>
> >>>>>> Can we use a DMI based quirk for this platform? It seems like a
> >>>>>> platform
> >>>>>> specific issue.
> >>>>>
> >>>>> We seem to see too many "platform-specific issues" here. :-)
> >>>>>
> >>>>> To me, the status quo (ie. what we have in 5.3-rc2) is not defensible.
> >>>>> Something needs to be done to improve the situation.
> >>>>
> >>>> Rafael, would it be possible to try popping out PC401 from the 9380 and
> >>>> into a 9360 to
> >>>> confirm there actually being a platform impact or not?
> >>>
> >>> Not really, sorry.
> >>>
> >>>> I was hoping to have something useful from Hynix by now before
> >>>> responding, but oh well.
> >>>>
> >>>> In terms of what is the majority, I do know that between folks at Dell,
> >>>> Google, Compal,
> >>>> Wistron, Canonical, Micron, Hynix, Toshiba, LiteOn, and Western Digital
> >>>> we tested a wide
> >>>> variety of SSDs with this patch series.  I would like to think that they
> >>>> are representative of
> >>>> what's being manufactured into machines now.
> >>>
> >>> Well, what about drives already in the field?  My concern is mostly
> >>> about those ones.
> >>>
> >>>> Notably the LiteOn CL1 was tested with the HMB flushing support and
> >>>> and Hynix PC401 was tested with older firmware though.
> >>>>
> >>>>>>>> In which case we do need to reintroduce the HMB handling.
> >>>>>>>
> >>>>>>> Right.
> >>>>>>
> >>>>>> The patch alone doesn’t break HMB Toshiba NVMe I tested. But I think
> >>>>>> it’s
> >>>>>> still safer to do proper HMB handling.
> >>>>>
> >>>>> Well, so can anyone please propose something specific?  Like an
> >>>>> alternative patch?
> >>>>
> >>>> This was proposed a few days ago:
> >>>> http://lists.infradead.org/pipermail/linux-nvme/2019-July/026056.html
> >>>>
> >>>> However we're still not sure why it is needed, and it will take some
> >>>> time to get
> >>>> a proper failure analysis from LiteOn  regarding the CL1.
> >>>
> >>> Thanks for the update, but IMO we still need to do something before
> >>> final 5.3 while the investigation continues.
> >>>
> >>> Honestly, at this point I would vote for going back to the 5.2
> >>> behavior at least by default and only running the new code on the
> >>> drives known to require it (because they will block PC10 otherwise).
> >>>
> >>> Possibly (ideally) with an option for users who can't get beyond PC3
> >>> to test whether or not the new code helps them.
> >>
> >> I just found out that the XPS 9380 at my hand never reaches SLP_S0 but
> >> only
> >> PC10.
> >
> > That's the case for me too.
> >
> >> This happens with or without putting the device to D3.
> >
> > On my system, though, it only can get to PC3 without putting the NVMe
> > into D3 (as reported previously).
>
> I forgot to ask, what BIOS version does the system have?
> I don’t see this issue on BIOS v1.5.0.

It is 1.5.0 here too.

  reply	other threads:[~2019-08-05 21:29 UTC|newest]

Thread overview: 75+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-25  9:51 Rafael J. Wysocki
2019-07-25 14:02 ` Kai-Heng Feng
2019-07-25 16:23   ` Mario.Limonciello
2019-07-25 17:03     ` Rafael J. Wysocki
2019-07-25 17:23       ` Mario.Limonciello
2019-07-25 18:20       ` Kai-Heng Feng
2019-07-25 19:09         ` Mario.Limonciello
2019-07-30 10:45       ` Rafael J. Wysocki
2019-07-30 14:41         ` Keith Busch
2019-07-30 17:14           ` Mario.Limonciello
2019-07-30 18:50             ` Kai-Heng Feng
2019-07-30 19:19               ` Keith Busch
2019-07-30 21:05                 ` Mario.Limonciello
2019-07-30 21:31                   ` Keith Busch
2019-07-31 21:25                     ` Rafael J. Wysocki
2019-07-31 22:19                       ` Keith Busch
2019-07-31 22:33                         ` Rafael J. Wysocki
2019-08-01  9:05                           ` Kai-Heng Feng
2019-08-01 17:29                             ` Rafael J. Wysocki
2019-08-01 19:05                               ` Mario.Limonciello
2019-08-01 22:26                                 ` Rafael J. Wysocki
2019-08-02 10:55                                   ` Kai-Heng Feng
2019-08-02 11:04                                     ` Rafael J. Wysocki
2019-08-05 19:13                                       ` Kai-Heng Feng
2019-08-05 21:28                                         ` Rafael J. Wysocki [this message]
2019-08-06 14:02                                           ` Mario.Limonciello
2019-08-06 15:00                                             ` Rafael J. Wysocki
2019-08-07 10:29                                               ` Rafael J. Wysocki
2019-08-01 20:22                             ` Keith Busch
2019-08-07  9:48                         ` Rafael J. Wysocki
2019-08-07 10:45                           ` Christoph Hellwig
2019-08-07 10:54                             ` Rafael J. Wysocki
2019-08-07  9:53                         ` [PATCH] nvme-pci: Do not prevent PCI bus-level PM from being used Rafael J. Wysocki
2019-08-07 10:14                           ` Rafael J. Wysocki
2019-08-07 10:43                           ` Christoph Hellwig
2019-08-07 14:37                           ` Keith Busch
2019-08-08  8:36                         ` [PATCH] nvme-pci: Allow PCI bus-level PM to be used if ASPM is disabled Rafael J. Wysocki
2019-08-08  8:48                           ` Christoph Hellwig
2019-08-08  9:06                             ` Rafael J. Wysocki
2019-08-08 10:03                         ` [PATCH v2 0/2] " Rafael J. Wysocki
2019-08-08 10:06                           ` [PATCH v2 1/2] PCI: PCIe: ASPM: Introduce pcie_aspm_enabled_mask() Rafael J. Wysocki
2019-08-08 13:15                             ` Bjorn Helgaas
2019-08-08 14:48                               ` Rafael J. Wysocki
2019-08-08 10:10                           ` [PATCH v2 2/2] nvme-pci: Allow PCI bus-level PM to be used if ASPM is disabled Rafael J. Wysocki
2019-08-08 13:43                             ` Bjorn Helgaas
2019-08-08 14:47                               ` Rafael J. Wysocki
2019-08-08 17:06                                 ` Rafael J. Wysocki
2019-08-08 18:39                                 ` Bjorn Helgaas
2019-08-08 20:01                                   ` Keith Busch
2019-08-08 20:05                                   ` Mario.Limonciello
2019-08-08 20:41                                   ` Rafael J. Wysocki
2019-08-09  4:47                                     ` Bjorn Helgaas
2019-08-09  8:04                                       ` Rafael J. Wysocki
2019-08-08 21:51                         ` [PATCH v3 0/2] " Rafael J. Wysocki
2019-08-08 21:55                           ` [PATCH v3 1/2] PCI: PCIe: ASPM: Introduce pcie_aspm_enabled() Rafael J. Wysocki
2019-08-09  4:50                             ` Bjorn Helgaas
2019-08-09  8:00                               ` Rafael J. Wysocki
2019-10-07 22:34                             ` Bjorn Helgaas
2019-10-08  9:27                               ` Rafael J. Wysocki
2019-10-08 21:16                                 ` Bjorn Helgaas
2019-10-08 22:54                                   ` Rafael J. Wysocki
2019-10-09 12:49                                     ` Bjorn Helgaas
2019-08-08 21:58                           ` [PATCH v3 2/2] nvme-pci: Allow PCI bus-level PM to be used if ASPM is disabled Rafael J. Wysocki
2019-08-08 22:13                           ` [PATCH v3 0/2] " Keith Busch
2019-08-09  8:05                             ` Rafael J. Wysocki
2019-08-09 14:52                               ` Keith Busch
2019-07-25 16:59   ` [Regression] Commit "nvme/pci: Use host managed power state for suspend" has problems Rafael J. Wysocki
2019-07-25 14:52 ` Keith Busch
2019-07-25 19:48   ` Rafael J. Wysocki
2019-07-25 19:52     ` Keith Busch
2019-07-25 20:02       ` Rafael J. Wysocki
2019-07-26 14:02         ` Kai-Heng Feng
2019-07-27 12:55           ` Rafael J. Wysocki
2019-07-29 15:51             ` Mario.Limonciello
2019-07-29 22:05               ` Rafael J. Wysocki

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