linux-kernel - Re: ATA failure regression

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Message-ID: <20160929112558.GA24350@khazad-dum.debian.net>
Date:   Thu, 29 Sep 2016 08:25:58 -0300
From:   Henrique de Moraes Holschuh <hmh@....eng.br>
To:     "tj@...nel.org" <tj@...nel.org>
Cc:     "Shah, Nehal-bakulchandra" <Nehal-bakulchandra.Shah@....com>,
        Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "holler@...oftware.de" <holler@...oftware.de>,
        "linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: ATA failure regression

On Thu, 29 Sep 2016, tj@...nel.org wrote:
> On Wed, Sep 28, 2016 at 05:45:08AM +0000, Shah, Nehal-bakulchandra wrote:
> > Can someone please help me to debug this issue?
> 
> The only thing I can do from libata side is disbling msi on the
> affected platform, but the problem doesn't seem confined to ahci, so
> probably the right thing to do for now is disabling msi on the
> platform?

Actually, according to Shah's post from the 26th to this thread,
everything works just fine even with the IOMMU enabled, as long as the
system is configured to NOT auto-shutdown unused SATA ports.

That seems to give some extra avenues at fixing/working around the
issue, maybe?

-- 
  Henrique Holschuh