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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