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Re: [Xen-devel] [PATCH] xen: switch to post-init routines in xen mmu.c earlier

On 12/10/2014 05:13 PM, Konrad Rzeszutek Wilk wrote:
On Wed, Dec 10, 2014 at 04:56:03PM +0100, Juergen Gross wrote:
With the virtual mapped linear p2m list the post-init mmu operations
must be used for setting up the p2m mappings, as in case of
CONFIG_FLATMEM the init routines may trigger BUGs.

Um, could you explain a bit more of why the CONFIG_FLATMEM
is such unique? What about the other CONFIG_*MEM cases?

CONFIG_FLATMEM is just the configuration hitting a BUG() in
xen_alloc_pte_init() being used after finishing paging_init().


Reported-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
  arch/x86/xen/mmu.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 6ab6150..a1a429a 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1225,6 +1225,7 @@ static void __init xen_pagetable_p2m_setup(void)
  static void __init xen_pagetable_init(void)
+       xen_post_allocator_init();


@@ -1236,7 +1237,6 @@ static void __init xen_pagetable_init(void)

-       xen_post_allocator_init();
  static void xen_write_cr2(unsigned long cr2)

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