From: Wim ten Have <wim.ten.have@oracle.com>
To: Sinan Kaya <okaya@codeaurora.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
Wim ten Have <wim.ten.have@oracle.com>
Subject: Re: Red Hat (Fedora) bug report 1467674 concerning your kernel functional performance enhancements causing PCI Express crashes,
Date: Tue, 4 Jul 2017 19:59:16 +0200 [thread overview]
Message-ID: <20170704195916.43fbe6e4.wim.ten.have@oracle.com> (raw)
In-Reply-To: <2acc9a73-0c2c-31f3-fcdf-42289213860e@codeaurora.org>
On Tue, 4 Jul 2017 11:57:37 -0400
Sinan Kaya <okaya@codeaurora.org> wrote:
> Hi,
>
> On 7/4/2017 11:32 AM, Bjorn Helgaas wrote:
> > [+cc linux-pci]
> >
> > Thanks very much for the detailed problem report, Wim! I'm taking the
> > liberty to forward to the linux-pci list in case others trip over the
> > same thing.
> >
>
> So, the spec is lying :) and reality doesn't match theory.
>
> "Per the ECN mentioned below, all PCIe Receivers are expected to support
> Extended Tags"
>
> > The problem is not specific to this piece of h/w. I did pin-point the
> > issue to specific kernel code commit
> <snip>
>
> > 60db3a4d8cc9073cf56264785197ba75ee1caca4
> > * <wtenhave@hagen:55> git bisect good
> > 60db3a4d8cc9073cf56264785197ba75ee1caca4 is the first bad commit
> > commit 60db3a4d8cc9073cf56264785197ba75ee1caca4
> > Author: Sinan Kaya <okaya@codeaurora.org>
> > Date: Fri Jan 20 09:16:51 2017 -0500
> >
> > PCI: Enable PCIe Extended Tags if supported
> >
> <snip>
>
> > 3. Boot and see it crash as soon it starts to operate on specific PCI
> > Express Ethernet controller.
> >
>
> I guess we have an endpoint/system with errata that needs to be blacklisted.
> Can you please try another endpoint with the same system?
>
> You have conflicting information above. I want to understand whether it
> is the endpoint or the system that needs to be blacklisted.
Specific PCI Express ethernet are embedded on the systems mainboard.
There's only one PCI Express that requires a riser card. It is empty.
> Please also provide sudo lspci -vvv output from the system with the patch.
> Sinan
Detail (lspci -vvv) is added to RedHat filed bugzilla entry; BugID 1467674
since the info is rather large.
https://bugzilla.redhat.com/show_bug.cgi?id=1467674
Enjoy,
- Wim.
next prev parent reply other threads:[~2017-07-04 17:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170704161352.1cdb2670.wim.ten.have@oracle.com>
2017-07-04 15:32 ` Fwd: Red Hat (Fedora) bug report 1467674 concerning your kernel functional performance enhancements causing PCI Express crashes, Bjorn Helgaas
2017-07-04 15:57 ` Sinan Kaya
2017-07-04 17:59 ` Wim ten Have [this message]
2017-07-04 22:25 ` Sinan Kaya
2017-07-05 1:00 ` Sinan Kaya
2017-07-05 7:42 ` Ethan Zhao
2017-07-05 12:28 ` Sinan Kaya
2017-07-05 11:13 ` Wim ten Have
2017-07-05 12:37 ` Sinan Kaya
2017-07-05 13:00 ` Wim ten Have
2017-07-05 13:20 ` Sinan Kaya
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