linux-kernel - Re: libata EH running when switching VTs

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Date:	Mon, 24 Jan 2011 19:23:30 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Toralf Förster <toralf.foerster@....de>
CC:	linux-kernel@...r.kernel.org, ide <linux-ide@...r.kernel.org>
Subject: Re: libata EH running when switching VTs

On 01/22/2011 11:31 AM, Toralf Förster wrote:
>
> Robert Hancock wrote at 17:36:15
>> (CCing linux-ide)
>>
>> On 01/22/2011 09:25 AM, Toralf Förster wrote:
>>> Hello,
>>>
>>> Henrique de Moraes Holschuh wrote at 14:11:12
>>>
>>>> I don't even know whom to refer you to.  Maybe ask in LKML directly?
>>>> Use the subject "libata EH running when switching VTs".  If one of
>>>> those VTs are in X.org control, say that as well.
>>>
>>> I'm wondering why I get this in /var/log/messages w/ kernel 2.6.37 when I
>>> switch from VT7 (running xorg ) to VT12 (or 1 or 2 or another number) and
>>> back:
>>>
>>>
>>> 2011-01-22T16:20:53.854+01:00 n22 kernel: ata1: hard resetting link
>>> 2011-01-22T16:20:54.163+01:00 n22 kernel: ata1: SATA link up 1.5 Gbps
>>> (SStatus 113 SControl 300)
>>> 2011-01-22T16:20:54.164+01:00 n22 kernel: ata1.00: ACPI cmd
>>> ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
>>> 2011-01-22T16:20:54.164+01:00 n22 kernel: ata1.00: ACPI cmd
>>> f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
>>> 2011-01-22T16:20:54.165+01:00 n22 kernel: ata1.00: ACPI cmd
>>> ef/5f:00:00:00:00:a0 (SET FEATURES) succeeded
>>> 2011-01-22T16:20:54.165+01:00 n22 kernel: ata1.00: ACPI cmd
>>> ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
>>> 2011-01-22T16:20:54.169+01:00 n22 kernel: ata1.00: ACPI cmd
>>> ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
>>> 2011-01-22T16:20:54.169+01:00 n22 kernel: ata1.00: ACPI cmd
>>> f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
>>> 2011-01-22T16:20:54.169+01:00 n22 kernel: ata1.00: ACPI cmd
>>> ef/5f:00:00:00:00:a0 (SET FEATURES) succeeded
>>> 2011-01-22T16:20:54.169+01:00 n22 kernel: ata1.00: ACPI cmd
>>> ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
>>> 2011-01-22T16:20:54.170+01:00 n22 kernel: ata1.00: configured for
>>> UDMA/100 2011-01-22T16:20:54.171+01:00 n22 kernel: ata1: EH complete
>>>
>>>
>>> I'm running an almost stable Gentoo on a ThinkPad T400 with current
>>> kernel (2.6.37, earlier shows this behaviour too)
>>
>> Is that the only output you're getting? Can you post the full dmesg log
>> from bootup?
>
> Of course - attached here

Curious, there seems to be no indication of why EH was triggered, 
doesn't seem to be have been due to an error. Does this also happen in 
single-user mode or with minimal processes running? It's possible that 
userspace is triggering this somehow.
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