linux-kernel - Re: [Bugfix] x86, irq: Fix a regression caused by commit b5dc8e6c21e7

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Message-ID: <3D4349BB-5D83-48FD-B8AE-54B84E5ABA97@intel.com>
Date:	Mon, 10 Aug 2015 16:47:58 +0000
From:	"Rustad, Mark D" <mark.d.rustad@...el.com>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Alexander Holler <holler@...oftware.de>,
	Alex Deucher <alexdeucher@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"Luck, Tony" <tony.luck@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Bugfix] x86, irq: Fix a regression caused by commit
 b5dc8e6c21e7

Gerry,

> On Aug 9, 2015, at 1:15 AM, Jiang Liu <jiang.liu@...ux.intel.com> wrote:
> 
> Alex Deucher, Mark Rustad and Alexander Holler reported a regression
> with the latest v4.2-rc4 kernel, which breaks some SATA controllers.
> With multi-MSI capable SATA controllers, only the first port works,
> all other ports times out when executing SATA commands. This regression
> bisects to 52f518a3a7c2 ("x86/MSI: Use hierarchical irqdomains to manage
> MSI interrupts"), but it's not the root cause, it just triggers a bug
> caused by b5dc8e6c21e7 ("x86/irq: Use hierarchical irqdomain to manage
> CPU interrupt vectors").
> 
> With this patch applied, the affected SATA controllers work as expected.

I see the same thing here as well.

> Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
> Reported-by: Alex Deucher <alexdeucher@...il.com>
> Reported-by: Mark Rustad <mrustad@...il.com>
> Reported-by: Alexander Holler <holler@...oftware.de>
> ---
> Hi Alex, Mark and Alexandler,
> 	Sorry for the long delay to root cause this regression, it's
> really annoying. Could you please help test this patch against the
> latest v4.2-rcx?

It works for me. Thanks.

--
Mark Rustad, Networking Division, Intel Corporation


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