linux-kernel - Re: [Bugfix 0/3] Xen IRQ related hotfixes for v3.19

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Date:	Mon, 9 Feb 2015 13:17:35 +0100
From:	Sander Eikelenboom <linux@...elenboom.it>
To:	Stefan Bader <stefan.bader@...onical.com>
CC:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Tony Luck <tony.luck@...el.com>,
	<linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>
Subject: Re: [Bugfix 0/3] Xen IRQ related hotfixes for v3.19


Monday, February 9, 2015, 10:47:43 AM, you wrote:

> On 05.02.2015 21:07, Sander Eikelenboom wrote:
>> 
>> Tuesday, January 20, 2015, 3:21:04 AM, you wrote:
>> 
>>> Hi Thomas,
>>>         This patch set includes three hotfixes related Xen IRQ for v3.19.
>>> Sorry for the long delay to get these two regressions fixed, it really
>>> cost me some time to read and understand Xen IRQ code.
>> 
>>> Patch 1 fixes the failure to register ACPI SCI interrupt on Xen
>>> domain0 by reworking acpi_gsi_to_irq(). I will backport it to v3.18
>>> too once it reaches the mainstream kernel.
>> 
>>> Patch 2 fixes the regression in Xen PCI device passthrough(pciback).
>>> It's a temporary solution, I will send the formal fix for v3.20 and
>>> it has passed tests too.
>> 
>>> Patch 3 fixes an issue found when reading code. There's no real bug
>>> reports related to this issue yet.
>> 
>>> Great thanks to Konrad and Sander for testing fixes for these regressions.
>> 
>>> Regards,
>>> Gerry
>> 
>> Hi Gerry,
>> 
>> Since these patches now are: tested, reviewed and have landed into mainline,
>> could you also provide the backports for 3.17 and 3.18 where required ?

> This would be my attempt of backporting those to 3.18 (I have not tried whether
> they would apply to 3.17 as well). Those seem to work when test-booting and
> Sander said he will give them a try as well. But better check yourself I did not
> mess anything up while backporting. One of the three patches seemed not to be
> required at all.

> -Stefan

Hi Stefan / Gerry,

Happy to inform you i have tested stefan's backport-patches on Intel and AMD:

- Patches apply cleanly to kernel's 3.18.6 and 3.17.8 and compile.
  (hmm, 3.17 seems to be already EOL according to www.kernel.org ?)
- Fixes the subtle issues i had.

So .. Tested-by: Sander Eikelenboom <linux@...elenboom.it>

Thanks !

--
Sander

>> 
>> The number of people running into these (subtle) issues with these stable
>> kernels seems to be steadily increasing.
>> 
>> --
>> Sander
>> 
>>> Jiang Liu (3):
>>>   xen/pci: Kill function xen_setup_acpi_sci()
>>>   xen/irq, ACPI: Fix regression in xen PCI passthrough caused by
>>>     cffe0a2b5a34
>>>   xen/irq: Override ACPI IRQ management callback __acpi_unregister_gsi
>> 
>>>  arch/x86/include/asm/acpi.h |    1 +
>>>  arch/x86/kernel/acpi/boot.c |   26 +++++++++++------------
>>>  arch/x86/pci/xen.c          |   49 ++-----------------------------------------
>>>  drivers/acpi/pci_irq.c      |    1 -
>>>  4 files changed, 16 insertions(+), 61 deletions(-)
>> 
>> 


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