linux-kernel - Re: [PATCH v4 RESEND 4/11] x86/asm: Fix pud/pmd interfaces to handle large PAT bit

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Date:	Mon, 09 Nov 2015 12:16:41 -0700
From:	Toshi Kani <toshi.kani@....com>
To:	Boris Ostrovsky <boris.ostrovsky@...cle.com>, hpa@...or.com,
	tglx@...utronix.de, mingo@...hat.com
Cc:	akpm@...ux-foundation.org, bp@...en8.de, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, x86@...nel.org, jgross@...e.com,
	konrad.wilk@...cle.com, elliott@....com
Subject: Re: [PATCH v4 RESEND 4/11] x86/asm: Fix pud/pmd interfaces to
 handle large PAT bit

On Mon, 2015-11-09 at 13:06 -0500, Boris Ostrovsky wrote:
> On 09/17/2015 02:24 PM, Toshi Kani wrote:
> > Now that we have pud/pmd mask interfaces, which handle pfn & flags
> > mask properly for the large PAT bit.
> > 
> > Fix pud/pmd pfn & flags interfaces by replacing PTE_PFN_MASK and
> > PTE_FLAGS_MASK with the pud/pmd mask interfaces.
> > 
> > Suggested-by: Juergen Gross <jgross@...e.com>
> > Signed-off-by: Toshi Kani <toshi.kani@....com>
> > Cc: Juergen Gross <jgross@...e.com>
> > Cc: Konrad Wilk <konrad.wilk@...cle.com>
> > Cc: Thomas Gleixner <tglx@...utronix.de>
> > Cc: H. Peter Anvin <hpa@...or.com>
> > Cc: Ingo Molnar <mingo@...hat.com>
> > Cc: Borislav Petkov <bp@...en8.de>
> > ---
> >   arch/x86/include/asm/pgtable.h       |   14 ++++++++------
> >   arch/x86/include/asm/pgtable_types.h |    4 ++--
> >   2 files changed, 10 insertions(+), 8 deletions(-)
> > 
> 
> 
> Looks like this commit is causing this splat for 32-bit kernels. I am 
> attaching my config file, just in case.

Thanks for the report!  I'd like to reproduce the issue since I am not sure how
this change caused it...

I tried to build a kernel with the attached config file, and got the following
error.  Not sure what I am missing.  

----
$ make -j24 ARCH=i386
   :
  LD      drivers/built-in.o
  LINK    vmlinux
./.config: line 44: $'\r': command not found
Makefile:929: recipe for target 'vmlinux' failed
make: *** [vmlinux] Error 127
----

Do you have steps to reproduce the issue?  Or do you see it during boot-time?

Thanks,
-Toshi

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