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Re: [Xen-devel] Pagetable updates

To: Jacob Gorm Hansen <jacobg@xxxxxxx>
Subject: Re: [Xen-devel] Pagetable updates
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Thu, 19 Feb 2004 17:24:48 +0000
Cc: Xen list <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
Delivery-date: Thu, 19 Feb 2004 17:34:36 +0000
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In-reply-to: Your message of "Thu, 19 Feb 2004 18:16:31 +0100." <1077210991.20632.11.camel@jacobg>
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> hi,
> 
> I am having a problem with some pagetable-updates that seem to by
> sneaking past my checks in XenoLinux. I have #undeffed CONFIG_XENO in
> mm/memory.c, and have checking code in place in the functions 
> 
> MULTICALL_flush_page_update_queue() &
> __flush_page_update_queue() 
> 
> in arch/xeno/mm/hypervisor.c.
> 
> Is there anywhere else (like in asm-code somewhere) pte-updates are
> passed up to Xen without my knowledge?

I think page-table updates are all made via the interface you
mention. Some things (e.g., LDT updates are sometimes done directly --
for example within the GPF handler).

 -- Keir


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