From: "Yinghai Lu" <yhlu.kernel@gmail.com>
To: "Neil Horman" <nhorman@tuxdriver.com>
Cc: "Ben Woodard" <woodard@redhat.com>,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels on boot cpu
Date: Tue, 11 Dec 2007 17:07:18 -0800 [thread overview]
Message-ID: <86802c440712111707s2a7d0a1dy684b093e64c9f398@mail.gmail.com> (raw)
In-Reply-To: <20071212005202.GA19016@hmsreliant.think-freely.org>
On Dec 11, 2007 4:52 PM, Neil Horman <nhorman@tuxdriver.com> wrote:
> On Tue, Dec 11, 2007 at 04:16:32PM -0800, Ben Woodard wrote:
> > We may need to go back and do some additional work on this. It doesn't
> > seem to be quite as cut and dried as we initially thought.
> >
> > This quirk doesn't appear to work on virtually the same motherboard with
> > the barcelona processors in it. It also may be sensitive to the firmware
> > version. More extensive testing on a larger number of pre-production is
> > not showing it to be as effective as it appeared to be initially on the
> > testbed.
> >
> > I'm doing some retesting to figure out what exact situations and
> > collection of patches were able to make it work before.
> >
> Ben, please lets be clear about this. You say this patch doesn't help on a new
> system. Even thought its almost the exact same system, its not the same system.
> Does this patch work consistently on the system you initially reported the
> problem on? I've done enough work on this at this point that I'm invested in
> not abandoning this fix. If this solves the problem on dual core system, but
> not quad core, I'd much rather move forward with this fix and address your quad
> core problem as a separate issue.
>
> Neil
>
>
> > -ben
> >
> >
> >
> > Neil Horman wrote:
> > > Recently a kdump bug was discovered in which a system would hang inside
> > > calibrate_delay during the booting of the kdump kernel. This was caused by the
> > > fact that the jiffies counter was not being incremented during timer
> > > calibration. The root cause of this problem was found to be a bios
> > > misconfiguration of the hypertransport bus. On system affected by this hang,
> > > the bios had assigned APIC ids which used extended apic bits (more than the
> > > nominal 4 bit ids's), but failed to configure bit 17 of the hypertransport
> > > transaction config register, which indicated that the mask for the destination
> > > field of interrupt packets accross the ht bus (see section 3.3.9 of
> > > http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26094.PDF).
> > > If a crash occurs on a cpu with an APIC id that extends beyond 4 bits, it will
> > > not recieve interrupts during the kdump kernel boot, and this hang will be the
> > > result. The fix is to add this patch, whcih add an early pci quirk check, to
> > > forcibly enable this bit in the httcfg register. This enables all cpus on a
> > > system to receive interrupts, and allows kdump kernel bootup to procede
> > > normally.
> > >
> > > Regards
> > > Neil
> > >
> > >
> > > Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
> > >
...
> > > static struct chipset early_qrk[] __initdata = {
> > > - { PCI_VENDOR_ID_NVIDIA, nvidia_bugs },
> > > - { PCI_VENDOR_ID_VIA, via_bugs },
> > > - { PCI_VENDOR_ID_ATI, ati_bugs },
> > > + { PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, nvidia_bugs },
> > > + { PCI_VENDOR_ID_VIA, PCI_ANY_ID, PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, via_bugs },
> > > + { PCI_VENDOR_ID_ATI, PCI_ANY_ID, PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, ati_bugs },
> > > + { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB, PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, fix_hypertransport_config },
==>
+ { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, fix_hypertransport_config },
+ { PCI_VENDOR_ID_AMD, 0x1200 , PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID,
fix_hypertransport_config },
I still think good way is that you ask Supermicro to update their BIOS
to use newer code from AMD.
YH
next prev parent reply other threads:[~2007-12-12 1:07 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-27 1:47 [PATCH] kexec: force x86_64 arches to boot kdump kernels on boot cpu Neil Horman
2007-11-27 4:12 ` Eric W. Biederman
2007-11-27 13:13 ` Neil Horman
2007-11-27 13:28 ` Eric W. Biederman
2007-11-27 13:45 ` Andi Kleen
2007-11-27 14:28 ` Neil Horman
2007-11-27 14:43 ` Andi Kleen
2007-11-27 14:48 ` Neil Horman
2007-11-27 15:24 ` Andi Kleen
2007-11-27 15:30 ` Eric W. Biederman
2007-11-27 16:45 ` Neil Horman
2007-11-27 20:50 ` Ben Woodard
2007-11-27 21:05 ` Neil Horman
2007-11-27 22:38 ` Eric W. Biederman
2007-11-27 23:15 ` Ben Woodard
2007-11-28 0:15 ` Eric W. Biederman
2007-11-27 23:40 ` Neil Horman
2007-11-28 0:43 ` Eric W. Biederman
2007-11-28 15:54 ` Neil Horman
2007-11-27 14:56 ` Eric W. Biederman
2007-11-27 15:34 ` Neil Horman
2007-11-27 18:41 ` Ben Woodard
2007-11-27 19:42 ` Neil Horman
2007-11-27 20:00 ` Vivek Goyal
2007-11-27 20:52 ` Neil Horman
2007-11-27 22:24 ` Andi Kleen
2007-11-27 23:24 ` Ben Woodard
2007-11-27 23:56 ` Andi Kleen
2007-11-28 15:36 ` Vivek Goyal
2007-11-28 16:02 ` Neil Horman
2007-11-28 17:36 ` Eric W. Biederman
2007-11-28 18:16 ` Neil Horman
2007-11-28 19:05 ` Vivek Goyal
2007-11-28 19:42 ` Eric W. Biederman
2007-11-28 21:09 ` Neil Horman
2007-11-28 23:27 ` Eric W. Biederman
2007-11-30 2:16 ` Ben Woodard
2007-11-30 2:54 ` Eric W. Biederman
2007-11-30 8:59 ` Yinghai Lu
2007-11-30 14:35 ` Vivek Goyal
2007-11-30 14:32 ` Neil Horman
2007-11-30 2:12 ` Ben Woodard
2007-11-30 14:42 ` Vivek Goyal
2007-11-30 14:51 ` Neil Horman
2007-12-06 21:39 ` Neil Horman
2007-12-06 22:11 ` Vivek Goyal
2007-12-07 0:10 ` Neil Horman
2007-12-07 14:39 ` Vivek Goyal
2007-12-07 14:53 ` Neil Horman
2007-12-07 15:16 ` Vivek Goyal
2007-12-07 15:53 ` Neil Horman
2007-12-07 18:46 ` Eric W. Biederman
2007-12-07 0:33 ` Eric W. Biederman
2007-12-07 2:04 ` Neil Horman
2007-12-07 8:50 ` Yinghai Lu
2007-12-07 9:22 ` Yinghai Lu
2007-12-07 14:21 ` Neil Horman
2007-12-07 17:58 ` Neil Horman
2007-12-07 19:19 ` yhlu
2007-12-07 20:13 ` Neil Horman
2007-12-10 15:39 ` Neil Horman
2007-12-10 16:20 ` Vivek Goyal
2007-12-11 1:17 ` Eric W. Biederman
2007-12-11 1:08 ` Eric W. Biederman
2007-12-11 3:43 ` Neil Horman
2007-12-11 4:48 ` Eric W. Biederman
2007-12-11 6:31 ` Yinghai Lu
2007-12-11 14:39 ` Neil Horman
2007-12-11 15:29 ` Eric W. Biederman
2007-12-11 18:00 ` Yinghai Lu
2007-12-11 18:29 ` Neil Horman
2007-12-11 18:45 ` Yinghai Lu
2007-12-11 18:22 ` Neil Horman
2007-12-11 18:46 ` Eric W. Biederman
2007-12-11 19:24 ` Neil Horman
2007-12-11 19:51 ` Yinghai Lu
2007-12-11 20:59 ` Neil Horman
2007-12-12 0:16 ` Ben Woodard
2007-12-12 0:52 ` Neil Horman
2007-12-12 1:07 ` Yinghai Lu [this message]
2007-12-12 8:43 ` [PATCH] k8: Enable legacy irqs with extended cpu ids Eric W. Biederman
2007-12-12 14:21 ` [PATCH] kexec: force x86_64 arches to boot kdump kernels on boot cpu Andi Kleen
2007-12-12 15:55 ` Neil Horman
2007-12-12 16:07 ` Andi Kleen
2007-12-12 19:43 ` Eric W. Biederman
2007-12-12 20:22 ` Neil Horman
2007-12-12 21:32 ` Eric W. Biederman
2007-12-13 14:39 ` Neil Horman
2007-12-13 15:16 ` Andi Kleen
2007-12-13 15:32 ` Neil Horman
2007-12-17 11:38 ` Neil Horman
2007-12-18 0:13 ` Eric W. Biederman
2007-12-17 15:16 ` Ingo Molnar
2007-12-17 15:47 ` Neil Horman
2007-12-07 18:36 ` Eric W. Biederman
2007-12-07 18:48 ` Neil Horman
2007-11-27 13:53 ` Neil Horman
2007-11-27 10:55 ` Andi Kleen
2007-11-27 11:19 ` Eric W. Biederman
2007-11-27 13:28 ` Neil Horman
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