linux-kernel - RE: [patch 0/4] x86: PAT followup - Incremental changes and bug fixes

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Message-ID: <924EFEDD5F540B4284297C4DC59F3DEE5E8B8D@orsmsx423.amr.corp.intel.com>
Date:	Wed, 16 Jan 2008 11:37:33 -0800
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	"Andreas Herrmann" <andreas.herrmann3@....com>
Cc:	<ak@....de>, <ebiederm@...ssion.com>, <rdreier@...co.com>,
	<torvalds@...ux-foundation.org>, <gregkh@...e.de>,
	<airlied@...net.ie>, <davej@...hat.com>, <mingo@...e.hu>,
	<tglx@...utronix.de>, <hpa@...or.com>, <akpm@...ux-foundation.org>,
	<arjan@...radead.org>, "Barnes, Jesse" <jesse.barnes@...el.com>,
	<davem@...emloft.net>, <linux-kernel@...r.kernel.org>
Subject: RE: [patch 0/4] x86: PAT followup - Incremental changes and bug fixes


Sorry. Never mind about e820 map. Somehow I did not notice the boot.log
you had attached earlier.

Thanks,
Venki 

>-----Original Message-----
>From: Pallipadi, Venkatesh 
>Sent: Wednesday, January 16, 2008 11:06 AM
>To: 'Andreas Herrmann'
>Cc: ak@....de; ebiederm@...ssion.com; rdreier@...co.com; 
>torvalds@...ux-foundation.org; gregkh@...e.de; 
>airlied@...net.ie; davej@...hat.com; mingo@...e.hu; 
>tglx@...utronix.de; hpa@...or.com; akpm@...ux-foundation.org; 
>arjan@...radead.org; Barnes, Jesse; davem@...emloft.net; 
>linux-kernel@...r.kernel.org
>Subject: RE: [patch 0/4] x86: PAT followup - Incremental 
>changes and bug fixes
>
>
>Can you attach the e820 map from the top of your dmesg.
>
>Thanks,
>Venki 
>
>>-----Original Message-----
>>From: Andreas Herrmann [mailto:andreas.herrmann3@....com] 
>>Sent: Wednesday, January 16, 2008 10:58 AM
>>To: Pallipadi, Venkatesh
>>Cc: ak@....de; ebiederm@...ssion.com; rdreier@...co.com; 
>>torvalds@...ux-foundation.org; gregkh@...e.de; 
>>airlied@...net.ie; davej@...hat.com; mingo@...e.hu; 
>>tglx@...utronix.de; hpa@...or.com; akpm@...ux-foundation.org; 
>>arjan@...radead.org; Barnes, Jesse; davem@...emloft.net; 
>>linux-kernel@...r.kernel.org
>>Subject: Re: [patch 0/4] x86: PAT followup - Incremental 
>>changes and bug fixes
>>
>>Hi,
>>
>>I just want to report that the PAT support in x86/mm causes crashes
>>on two of my test machines. On both boxes the SATA detection does
>>not work when the PAT support is patched into the kernel.
>>
>>Symptoms are as follows -- best described by a diff between the
>>two boot.logs:
>>
>># diff boot-failing.log boot-working.log
>>
>>-Linux version 2.6.24-rc8-ga9f7faa5 (root@...ter) (gcc version ...
>>+Linux version 2.6.24-rc8-g2ea3cf43 (root@...ter) (gcc version ...
>>...
>> early_iounmap(ffffffff82a0b000, 00001000)
>>-early_ioremap(000000000000c000, 00001000) => -000002103394304
>>-early_iounmap(ffffffff82a0c000, 00001000)
>> early_iounmap(ffffffff82808000, 00001000)
>>...
>>-ACPI: PCI interrupt for device 0000:00:12.0 disabled
>>-sata_sil: probe of 0000:00:12.0 failed with error -12
>>+scsi0 : sata_sil
>>+scsi1 : sata_sil
>>+ata1: SATA max UDMA/100 mmio m512@...0403000 tf 0xc0403080 irq 22
>>...
>>-AC'97 space ioremap problem
>>-ACPI: PCI interrupt for device 0000:00:14.5 disabled
>>-ATI IXP AC97 controller: probe of 0000:00:14.5 failed with error -5
>> ALSA device list:
>>-  No soundcards found.
>>+  #0: ATI IXP rev 80 with ALC655 at 0xc0403800, irq 17
>>...
>>-VFS: Cannot open root device "sda1" or unknown-block(0,0)
>>-Please append a correct "root=" boot option; here are the 
>>available partitions:
>>-1600    4194302 hdc driver: ide-cdrom
>>-Kernel panic - not syncing: VFS: Unable to mount root fs on 
>>unknown-block(0,0)
>>+kjournald starting.  Commit interval 5 seconds
>>+EXT3-fs: mounted filesystem with ordered data mode.
>>+VFS: Mounted root (ext3 filesystem) readonly.
>>...
>>
>>   <snip>
>> 
>>The second test machine uses ahci. But the symptoms are similar.
>>
>>I performed a git-bisect on x86/mm. Last commit that worked for me was
>>
>>2ea3cf43fddecbfd66353caafdf73ec21ea3760b (x86: fix 
>>early_ioremap() ISA window)
>>
>>The subsequent commits for PAT support introduced the problem.
>>I noticed that PAT should be disabled by default, but 
>>obviously the patches
>>still have some side-effect. (Maybe ioremap changes lead to 
>>the problem?)
>>
>>Boot-logs are attached:
>>
>>  boot-failing.log for x86/mm as of v2.6.24-rc8-672-ga9f7faa
>>  boot-working.log for x86/mm as of v2.6.24-rc8-621-g2ea3cf4
>>
>>Hopefully it helps to track down the problem.
>>Maybe someone has an idea why the PAT patches are causing that
>>ominous "PCI interrupt for device ... disabled" messages.
>>
>>
>>Thanks and regards,
>>
>>Andreas
>>
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