[Xen-devel] Re: is xen_l1_entry_update a nop?

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 31/10/06 09:30, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:

> However it seems that at least all __set_fix_maps depend on
> xen_l1_entry_update path, and if it's a nop, how is xenlinux page table
> modified indeed? Because we did see dom0 working correctly.
> 
> Our environment is x86-64. :-(

Have you disassembled xen_l1_entry_update() and checked that it appears to
actually execute a hypercall?

The BUG_ON() with side effect is considered bad form. It should really be
if() BUG().

 -- Keir



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