From: "Andreas Herrmann3" <andreas.herrmann3@amd.com>
To: "Ingo Molnar" <mingo@elte.hu>
Cc: "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, hpa@zytor.com,
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: Fri, 18 Jan 2008 00:06:07 +0100 [thread overview]
Message-ID: <20080117230607.GI12631@alberich.amd.com> (raw)
In-Reply-To: <20080117223551.GA23543@elte.hu>
On Thu, Jan 17, 2008 at 11:35:51PM +0100, Ingo Molnar wrote:
>
> * Andreas Herrmann3 <andreas.herrmann3@amd.com> wrote:
>
> > > I'll check this asap
> >
> > So, now that I've avoided this tiny NULL-pointer-dereference, the
> > system boots fine as well with your (slightly modified) patch. See
> > dmesg attached.
>
> for now i applied your ioremap_uncached() patch and removed my patch.
>
> my patch might work if the MTRR marks that area UC. Does it on your
> system?
The region (c0403000-c04031ff) is not characterized by an MTRR.
The MTRRdefType specifies it and it is
MTRRdefType = 0x0000000000000c00
MemType=0
MtrrDefTypeFixEn=0x1
MtrrDefTypeEn=0x1
=> 0==UC
So, that's why it worked.
Andreas
prev parent reply other threads:[~2008-01-17 23:10 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
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 [this message]
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