[Xen-devel] Re: [PATCH] xen: correct size of level2_kernel_pgt

[Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>]

On Fri, 2010-10-29 at 18:22 +0100, Jeremy Fitzhardinge wrote:
> On 10/29/2010 08:56 AM, Ian Campbell wrote:
> > sizeof(pmd_t *) is 4 bytes on PAE leading to an allocation of only
> > 2048 bytes. The correct size is sizeof(pmd_t) giving us a full page
> > allocation.
> >
> > Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> > Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
> > ---
> >
> > Applies to mainline since 2.6.36 and to xen.git 2.6.32 based trees
> 
> This is just for 2.6.37?

2.6.36.stable too, I think. I added stable@xxxxxxxxxx to my patch header
but didn't "guilt refresh" so it didn't show up here.

Ian.

> 
>     J
> 
> >  arch/x86/xen/mmu.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
> > index c237b81..21ed8d7 100644
> > --- a/arch/x86/xen/mmu.c
> > +++ b/arch/x86/xen/mmu.c
> > @@ -2126,7 +2126,7 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
> >  {
> >     pmd_t *kernel_pmd;
> >  
> > -   level2_kernel_pgt = extend_brk(sizeof(pmd_t *) * PTRS_PER_PMD, 
> > PAGE_SIZE);
> > +   level2_kernel_pgt = extend_brk(sizeof(pmd_t) * PTRS_PER_PMD, PAGE_SIZE);
> >  
> >     max_pfn_mapped = PFN_DOWN(__pa(xen_start_info->pt_base) +
> >                               xen_start_info->nr_pt_frames * PAGE_SIZE +
> 



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