From: Jiang Liu <jiang.liu@linux.intel.com>
To: Joseph Salisbury <joseph.salisbury@canonical.com>
Cc: konrad.wilk@oracle.com, tony.luck@intel.com, joro@8bytes.org,
Greg KH <gregkh@linuxfoundation.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Bjorn Helgaas <bhelgaas@google.com>,
rdunlap@infradead.org, Yinghai Lu <yinghai@kernel.org>,
bp@alien8.de, len.brown@intel.com, pavel@ucw.cz,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
mingo@redhat.com, hpa@zytor.com, x86@kernel.org,
linux-pm@vger.kernel.org
Subject: Re: Subject: [v3.19 Regression] x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI
Date: Wed, 15 Jul 2015 11:17:32 +0800 [thread overview]
Message-ID: <55A5D0CC.6020100@linux.intel.com> (raw)
In-Reply-To: <55A54540.9050300@canonical.com>
On 2015/7/15 1:22, Joseph Salisbury wrote:
> On 07/13/2015 10:42 PM, Jiang Liu wrote:
>> On 2015/7/14 3:36, Joseph Salisbury wrote:
>>> Hello Jiang,
>>>
>>> A kernel bug report was opened against Ubuntu [0]. It was found that
>>> reverting the following commit resolves this bug:
>>>
>>> commit cd68f6bd53cf89d1d5ed889b8af65e9c3574a079
>>> Author: Jiang Liu <jiang.liu@linux.intel.com>
>>> Date: Mon Oct 27 16:11:52 2014 +0800
>>>
>>> x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI
>>>
>>> The regression was introduced as of v3.19-rc1.
>>>
>>> I was hoping to get your feedback, since you are the patch author. Do
>>> you think gathering any additional data will help diagnose this issue,
>>> or would it be best to submit a revert request?
>> Hi Joseph,
>> Sorry for the trouble. It would be great if we could get
>> more information about the bug, such as bug report info, dmesg and
>> acpidump from the reporting system.
>> Thanks!
>> Gerry
> Comments 3 and 4 have the requested information in the bugzilla bug:
> https://bugzilla.kernel.org/show_bug.cgi?id=101301
>
> Thanks again for the help!
Hi Joseph,
According to my investigation, it's an ACPI BIOS issue instead
of a kernel bug. But it's actually a regression. Now we enforce stricter
check for ACPI SCI interrupt, which exposes an implementation flaw in
the virtual BIOS.
I have posted the analysis at
https://bugzilla.kernel.org/show_bug.cgi?id=101301
But I have no account at launchpad, so could you please help to copy
the message to launchpad?
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440072
Thanks!
Gerry
next prev parent reply other threads:[~2015-07-15 3:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-13 19:36 Subject: [v3.19 Regression] x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI Joseph Salisbury
2015-07-14 2:42 ` Jiang Liu
2015-07-14 16:11 ` Joseph Salisbury
2015-07-14 17:22 ` Joseph Salisbury
2015-07-15 3:17 ` Jiang Liu [this message]
2015-07-15 16:05 ` Joseph Salisbury
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