lkml.org 
[lkml]   [2007]   [Dec]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
SubjectRe: [PATCH] Fix crash with FLAT_MEMORY and ARCH_PFN_OFFSET != 0
From
On Thu, Dec 20, 2007 at 01:27:20PM +0000, Mel Gorman wrote:
> On (20/12/07 13:43), Thomas Bogendoerfer didst pronounce:
> > On Thu, Dec 20, 2007 at 11:44:06AM +0000, Mel Gorman wrote:
> > > --- a/include/asm-mips/page.h
> > > +++ b/include/asm-mips/page.h
> > > @@ -37,13 +37,6 @@
> > > #include <linux/pfn.h>
> > > #include <asm/io.h>
> > >
> > > -/*
> > > - * It's normally defined only for FLATMEM config but it's
> > > - * used in our early mem init code for all memory models.
> > > - * So always define it.
> > > - */
> > > -#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
> > > -
> >
> > hmm, doesn't this break what I've fixed ? Without this #define
> > ARCH_PFN_OFFSET gets defined to 0 and the bug is back. Or did
> > I miss anything ?
> >
>
> ARCH_PFN_OFFSET goes to 0, so page_to_pfn() is no longer adjusting by
> PFN_UP(PHYS_OFFSET) like it was when your problem occured. I am guessing
> that the nature of the crash was that page_to_pfn() was returning bogus
> values early in boot and trying to initialise memmap that didn't exist.

ic, your patch works for me.

Thomas.

--
Crap can work. Given enough thrust pigs will fly, but it's not necessary a
good idea. [ RFC1925, 2.3 ]


\
 
 \ /
  Last update: 2007-12-30 12:49    [W:0.048 / U:2.296 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site