Re: ATA failure regression in kernel 4.2

[Alexander Holler]

Am 28.07.2015 um 20:19 schrieb Alex Deucher:
> On Mon, Jul 27, 2015 at 12:30 PM, Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> wrote:
> > On 2015/7/27 23:21, Alex Deucher wrote:
> > > On Sun, Jul 26, 2015 at 11:01 PM, Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> wrote:
> > > > On 2015/7/25 1:38, Alex Deucher wrote:
> > > > > On Thu, Jul 23, 2015 at 2:44 PM, Alex Deucher <alexdeucher@xxxxxxxxx> wrote:
> > > > > > On Thu, Jul 23, 2015 at 2:35 PM, Tejun Heo <tj@xxxxxxxxxx> wrote:
> > > > > > > Hello,
> > > > > > >
> > > > > > > On Thu, Jul 23, 2015 at 01:48:24PM -0400, Alex Deucher wrote:
> > > > > > > > Something new in kernel 4.2 seems to have broken one of my hard drives
> > > > > > > > (ssd) in kernel 4.2.  4.1 and older kernels work fine.  Here are the
> > > > > > > > relevant logs.
> > > > > > > ...
> > > > > > > > [    6.547628] ata2.00: qc timeout (cmd 0xec)
> > > > > > > > [    6.547721] ata2.00: failed to IDENTIFY (I/O error, err_mask=0x4)
> > > > > > > > [    7.007213] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
> > > > > > > > [   16.997819] ata2.00: qc timeout (cmd 0xec)
> > > > > > > > [   16.997910] ata2.00: failed to IDENTIFY (I/O error, err_mask=0x4)
> > > > > > > > [   16.997995] ata2: limiting SATA link speed to 3.0 Gbps
> > > > > > > > [   17.457400] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
> > > > > > > > [   47.429257] ata2.00: qc timeout (cmd 0xec)
> > > > > > > > [   47.429349] ata2.00: failed to IDENTIFY (I/O error, err_mask=0x4)
> > > > > > > > [   47.888822] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
> > > > > > >
> > > > > > > Nothing really rings a bell.  Timeouts on IDENTIFY.  Could be IRQ
> > > > > > > related.  Which controller is it (lspci -nn)?  Also, can you try to
> > > > > > > bisect the issue?
> > > > > >
> > > > > > 00:11.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH
> > > > > > SATA Controller [AHCI mode] [1022:7801] (rev 40)
> > > > > > 00:14.1 IDE interface [0101]: Advanced Micro Devices, Inc. [AMD] FCH
> > > > > > IDE Controller [1022:780c]
> > > > > >
> > > > > > I can take a look at bisecting later this week.
> > > > >
> > > > > You were right about the interrupts.  This is an AMD Kaveri APU system.
> > > > Hi Alex,
> > > >          Could you please help to provide more information about the
> > > > system so we could identify the issue? Dmesg and /proc/interrupts
> > > > from good and bad kernels are welcomed.
> > > > Thanks!
> > > > Gerry
> > >
> > > See attached.  Thanks!
> > Hi Alex,
> >          Thanks for the info. Seems something is wrong with multiple-MSI
> > support. To narrow down the scope, could you please help to:
>
> I'm also not getting interrupts in my gpu driver.  I haven't bisected
> this specifically, but I suspect it is related since it to used to
> work in 4.1.  Whether I enable MSIs or not in my driver, I get a huge
> numbers of interrupts on all CPUs as soon as the driver is loaded, but
> the driver isr never gets called.  E.g.,
>    49:  117757835  117763227  117787837  117868913   PCI-MSI
> 524288-edge      amdgpu
> nointremap doesn't seem to help.

Same problem here with the AMD SATA controller (1022:7801). It failed to 
identify the second disk when using 4.2-rc4.

nointremap helped, nothing else tested

Regards,

Alexander Holler
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