Re: [patch] i386, vdso=[0|1] boot option and /proc/sys/vm/vdso_enabled

[Zachary Amsden]

Andrew Morton wrote:
> Zachary Amsden <zach@xxxxxxxxxx> wrote:
>   
> > Please try my patch - sent earlier, but attached again.  It will tell 
> >  you with 100% confidence if the problem is with userspace expecting the 
> >  vsyscall page to be at a particular address.
> >
> >
> > [bogo-fixmap  text/plain (645 bytes)]
> >
> >  Index: linux-2.6.17-rc/include/asm-i386/fixmap.h
> >  ===================================================================
> >  --- linux-2.6.17-rc.orig/include/asm-i386/fixmap.h	2006-03-19 21:53:29.000000000 -0800
> >  +++ linux-2.6.17-rc/include/asm-i386/fixmap.h	2006-05-19 18:16:00.000000000 -0700
> >  @@ -20,7 +20,7 @@
> >    * Leave one empty page between vmalloc'ed areas and
> >    * the start of the fixmap.
> >    */
> >  -#define __FIXADDR_TOP	0xfffff000
> >  +#define __FIXADDR_TOP	0xffbff000
> >     
>
> The machine runs OK with that applied and with
> move-vsyscall-page-out-of-fixmap-into-normal-vma-as-per-mmap.patch not
> applied.
>   

Err.  That implies that there is likely a problem in the kernel patch, 
not in userspace,  Let's look more closely at 
move-vsyscall-page-out-of-fixmap-into-normal-vma-as-per-mmap and see if 
there is something missing.

Zach
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