linux-kernel - Re: [2.6.28-rc] Sata soft reset filling log

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Date:	Wed, 17 Dec 2008 02:26:57 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Justin Madru <bevicm@...extreme.com>,
	lkml <linux-kernel@...r.kernel.org>, linux-ide@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [2.6.28-rc] Sata soft reset filling log

Andrew Morton wrote:
> (cc linux-ide).
> 
> This is a post-2.6.27 regression.  Panic!
> 
> On Fri, 12 Dec 2008 18:07:49 -0800 Justin Madru <bevicm@...extreme.com> wrote:
> 
>> I've been testing .28 (currently -rc8) and I've noticed in the logs a 
>> massive amount of the following.
>> I can confirm that the messages doesn't appear when booting into a .27 
>> kernel.
>>
>> ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>> ata2.00: ST_FIRST: !(DRQ|ERR|DF)
>> ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>          cdb 1e 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
>>          res 50/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x2 (HSM violation)
>> ata2.00: status: { DRDY }
>> ata2: soft resetting link
>> ata2.00: configured for UDMA/33
>> ata2: EH complete
>>
>> I get this block of messages about every 20 seconds for as long as I'm 
>> booted into a .28 kernel.
>> It seems that the sata link is being soft reseted about every _20_ secs.
>> My drive is a sata drive that should be using UDMA/133 (right?),
>> but the "error" message says configuring for UDMA/33.
>> Does this mean that my drive is running at a slower speed?
>> Should I be worried about the .28 kernel corrupting my hardware? Is this 
>> a known issue?
>> How can I stop it from filling my logs!
>>
>> Some information about my computer:
>>
>> $ lspci
>> 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML 
>> and 945GT Express Memory Controller Hub (rev 03)
>> 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 
>> 943/940GML Express Integrated Graphics Controller (rev 03)
>> 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 
>> 943/940GML Express Integrated Graphics Controller (rev 03)
>> 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High 
>> Definition Audio Controller (rev 01)
>> 00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express 
>> Port 1 (rev 01)
>> 00:1c.3 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express 
>> Port 4 (rev 01)
>> 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
>> Controller #1 (rev 01)
>> 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
>> Controller #2 (rev 01)
>> 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
>> Controller #3 (rev 01)
>> 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
>> Controller #4 (rev 01)
>> 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI 
>> Controller (rev 01)
>> 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
>> 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface 
>> Bridge (rev 01)
>> 00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA 
>> IDE Controller (rev 01)
>> 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller 
>> (rev 01)
>> 03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX 
>> (rev 02)

What driver in use?  ata_piix?  Can you give full dmesg (boot + first 
few errors)?

Are there any ATAPI devices attached to this controller, in addition to 
the Seagate ST980811AS ?

	Jeff




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