Date: Tue, 30 Mar 2010 14:29:04 -0400 From: Ryan Stone <rysto32@gmail.com> To: "Dr. Baud" <drbaud@yahoo.com> Cc: freebsd-current@freebsd.org Subject: Re: pmap_extract question Message-ID: <n2lbc2d971003301129qd30e073w9ec6a11fe6263e4f@mail.gmail.com> In-Reply-To: <745921.1949.qm@web65613.mail.ac4.yahoo.com> References: <745921.1949.qm@web65613.mail.ac4.yahoo.com>
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Assuming that you're using the right pmap(it looks like you are, but it depends on the thread context in which you're running), that will only work if the userland application has touched the page and faulted it in. If it's never tried to access the page it will never be mapped into the process's page tables.
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