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Re: [Qemu-devel] [PATCH] linux-user: Fix page_find_alloc for 32-bit use


From: Paul Brook
Subject: Re: [Qemu-devel] [PATCH] linux-user: Fix page_find_alloc for 32-bit use on 64-bit hosts
Date: Wed, 23 Jul 2008 13:26:00 +0100
User-agent: KMail/1.9.9

On Sunday 13 July 2008, Jan Kiszka wrote:
> page_find_alloc, used e.g. for TB allocation, is not safe on 64-bit
> hosts for 32-bit guests. Patch below fixes this by requesting new pages
> only from the guest-reachable address range.

I'm pretty sure this is wrong. The structures allocated by page_find_alloc do 
not need to be accessible by the guest. In fact it's better if they are 
outside the guest address space.

Paul




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