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Date: Mon, 17 Jan 2011 15:00:00 +0800 From: Américo Wang <xiyou.wangcong@...il.com> To: xing lin <linxingnku@...il.com> Cc: linux-kernel@...r.kernel.org Subject: Re: BUG: unable to handle kernel paging request at ffff8800cf669000 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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