linux-kernel - Re: Random I/O lags on Lenovo T520: exception Emask 0x10 SAct 0x0 SErr 0x4040000 action 0xe frozen

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Date:	Wed, 26 Oct 2011 22:03:03 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Richard Yao <ryao@...stonybrook.edu>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Random I/O lags on Lenovo T520: exception Emask 0x10 SAct 0x0
 SErr 0x4040000 action 0xe frozen

On 10/25/2011 10:49 PM, Richard Yao wrote:
> Dear Everyone,
>
> I am seeing the following my system log on my 5 month old Lenovo T520,
> which has an OCZ Vertex 3 with the 2.15 firmware from OCZ:
>
> [38985.474597] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [38985.474606] ata4: irq_stat 0x00000040, connection status changed
> [38985.474621] ata4: hard resetting link
> [38986.196436] ata4: SATA link down (SStatus 0 SControl 300)
> [38986.207412] ata4: EH complete
> [39109.561841] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [39109.561851] ata4: irq_stat 0x00000040, connection status changed
> [39109.561865] ata4: hard resetting link
> [39110.283738] ata4: SATA link down (SStatus 0 SControl 300)
> [39110.294765] ata4: EH complete
> [41874.348949] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [41874.348958] ata4: irq_stat 0x00000040, connection status changed
> [41874.348973] ata4: hard resetting link
> [41875.070896] ata4: SATA link down (SStatus 0 SControl 300)
> [41875.081871] ata4: EH complete
> [42038.632726] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [42038.632736] ata4: irq_stat 0x00000040, connection status changed
> [42038.632750] ata4: hard resetting link
> [42039.354452] ata4: SATA link down (SStatus 0 SControl 300)
> [42039.365441] ata4: EH complete
> [45924.973330] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [45924.973339] ata4: irq_stat 0x00000040, connection status changed
> [45924.973353] ata4: hard resetting link
> [45925.694644] ata4: SATA link down (SStatus 0 SControl 300)
> [45925.705593] ata4: EH complete
> [47147.406966] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [47147.406975] ata4: irq_stat 0x00000040, connection status changed
> [47147.406989] ata4: hard resetting link
> [47148.128733] ata4: SATA link down (SStatus 0 SControl 300)
> [47148.139655] ata4: EH complete
> [49175.880115] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [49175.880124] ata4: irq_stat 0x00000040, connection status changed
> [49175.880137] ata4: hard resetting link
> [49176.601441] ata4: SATA link down (SStatus 0 SControl 300)
> [49176.612382] ata4: EH complete
> [61159.032750] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [61159.032759] ata4: irq_stat 0x00000040, connection status changed
> [61159.032773] ata4: hard resetting link
> [61159.753832] ata4: SATA link down (SStatus 0 SControl 300)
> [61159.764804] ata4: EH complete
> [67797.682487] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [67797.682496] ata4: irq_stat 0x00000040, connection status changed
> [67797.682510] ata4: hard resetting link
> [67798.403637] ata4: SATA link down (SStatus 0 SControl 300)
> [67798.414643] ata4: EH complete
> [73680.166448] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4040000
> action 0xe frozen
> [73680.166453] ata4: irq_stat 0x00000040, connection status changed
> [73680.166461] ata4: hard resetting link
> [73680.887669] ata4: SATA link down (SStatus 0 SControl 300)
> [73680.898649] ata4: EH complete
>
> Whenever this happens, KDE becomes semi-unresponsive. My first thought
> was that this might be an indicator that the Intel Cougar Point
> chipset in my laptop is dying, but I did a quick google search and
> people seemed to think it was a kernel bug. The last time I called
> Lenovo about an issue I had encountered, they told me that unless they
> can reproduce it on Windows, they would not do anything.  Does it look
> like a hardware problem or a kernel bug? I want the opinion of someone
> here before I call Lenovo about it.

That sounds like a hardware problem, but it could be either the laptop 
or the drive - it appears that the SATA link is going down (the Serror 
indicates a CommWake and device exchanged).
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