Re: BUG: unable to handle kernel paging request at ffff8800cf669000

[AmÃrico Wang]

On Sat, Jan 15, 2011 at 04:03:59PM -0700, xing lin wrote:
>It turns out I can not read that page in a kernel module at all. A
>simple read of that page will result in an oops as well. I have
>checked the flags of this page with others. They are almost the same.
>Any suggestions about why this happens or how to know whether a page
>can be read or not are really welcome. Thanks.
>

If you are using x86, you have CONFIG_X86_PTDUMP, with which
you can dump all page tables via debugfs.

Hope this helps.
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