From: "H. Peter Anvin" <hpa@zytor.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andreas Herrmann3 <andreas.herrmann3@amd.com>,
Venki Pallipadi <venkatesh.pallipadi@intel.com>,
ak@muc.de, ebiederm@xmission.com, rdreier@cisco.com,
torvalds@linux-foundation.org, gregkh@suse.de, airlied@skynet.ie,
davej@redhat.com, tglx@linutronix.de, akpm@linux-foundation.org,
arjan@infradead.org, jesse.barnes@intel.com, davem@davemloft.net,
linux-kernel@vger.kernel.org, suresh.b.siddha@intel.com
Subject: Re: [patch 0/4] x86: PAT followup - Incremental changes and bug fixes
Date: Thu, 17 Jan 2008 15:33:45 -0500 [thread overview]
Message-ID: <478FBBA9.4070300@zytor.com> (raw)
In-Reply-To: <20080117203600.GB27778@elte.hu>
Ingo Molnar wrote:
> * Andreas Herrmann3 <andreas.herrmann3@amd.com> wrote:
>
>> For the failed devices I get:
>>
>> sata_sil 0000:00:12.0: version 2.3
>> ACPI: PCI Interrupt 0000:00:12.0[A] -> GSI 22 (level, low) -> IRQ 22
>> ioremap_nocache: addr c0403000, size 200
>> swapper:1 conflicting cache attribute c0403000-c0404000 uncached<->default
>> ACPI: PCI interrupt for device 0000:00:12.0 disabled
>
> hm, is the problem that the two devices share the same physical page,
> and thus get an overlapping area?
>
> as an intermediate fix, how about following the attribute of the already
> existing mapping, instead of rejecting the ioremap due to the conflict?
> I.e. something like below?
The correct behaviour probably would be to go with the most restrictive
caching behaviour, i.e. uncached in this case.
-hpa
next prev parent reply other threads:[~2008-01-17 20:43 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-16 2:39 [patch 0/4] x86: PAT followup - Incremental changes and bug fixes venkatesh.pallipadi
2008-01-16 2:39 ` [patch 1/4] x86: PAT followup - Do not fold two bits in _PAGE_PCD venkatesh.pallipadi
2008-01-16 2:39 ` [patch 2/4] x86: PAT followup - Remove KERNPG_TABLE from pte entry venkatesh.pallipadi
2008-01-16 8:14 ` Mika Penttilä
2008-01-16 18:17 ` Pallipadi, Venkatesh
2008-01-17 0:18 ` Venki Pallipadi
2008-01-16 2:39 ` [patch 3/4] x86: PAT followup - Remove reserved pages mapping to zero page and not map them venkatesh.pallipadi
2008-01-16 2:39 ` [patch 4/4] x86: PAT followup - use ioremap for devmem read of reserved regions venkatesh.pallipadi
2008-01-16 7:33 ` Ingo Molnar
2008-01-16 7:29 ` [patch 0/4] x86: PAT followup - Incremental changes and bug fixes Ingo Molnar
2008-01-16 18:57 ` Andreas Herrmann
2008-01-16 19:05 ` Pallipadi, Venkatesh
2008-01-16 19:37 ` Pallipadi, Venkatesh
2008-01-16 20:24 ` Ingo Molnar
2008-01-16 20:33 ` Venki Pallipadi
2008-01-16 22:01 ` Andi Kleen
2008-01-16 22:14 ` Pallipadi, Venkatesh
2008-01-16 22:29 ` Andi Kleen
2008-01-17 19:12 ` Andreas Herrmann3
2008-01-17 19:54 ` Andreas Herrmann3
2008-01-17 20:36 ` Ingo Molnar
2008-01-17 20:33 ` H. Peter Anvin [this message]
2008-01-17 20:56 ` Ingo Molnar
2008-01-17 20:57 ` Linus Torvalds
2008-01-17 20:44 ` Ingo Molnar
2008-01-17 21:03 ` Andreas Herrmann3
2008-01-17 21:13 ` Ingo Molnar
2008-01-17 21:22 ` Ingo Molnar
2008-01-17 21:31 ` Siddha, Suresh B
2008-01-17 21:38 ` H. Peter Anvin
2008-01-24 20:22 ` Eric W. Biederman
2008-01-24 21:36 ` H. Peter Anvin
2008-01-17 21:42 ` Ingo Molnar
2008-01-17 22:06 ` Andreas Herrmann3
2008-01-17 22:05 ` H. Peter Anvin
2008-01-17 22:15 ` Ingo Molnar
2008-01-17 22:52 ` Andreas Herrmann3
2008-01-17 23:04 ` Venki Pallipadi
2008-01-17 23:24 ` Andreas Herrmann3
2008-01-17 23:42 ` Pallipadi, Venkatesh
2008-01-18 16:10 ` Andreas Herrmann3
2008-01-18 17:13 ` Pallipadi, Venkatesh
2008-01-18 17:33 ` Balbir Singh
2008-01-18 4:25 ` Andi Kleen
2008-01-17 21:42 ` Andreas Herrmann3
2008-01-17 22:13 ` Ingo Molnar
2008-01-17 22:16 ` Andreas Herrmann3
2008-01-17 22:26 ` Andreas Herrmann3
2008-01-17 22:35 ` Ingo Molnar
2008-01-17 23:06 ` Andreas Herrmann3
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