Please ignore my prvious posting, my apologies to post in HTML, Outlook tricked me (again) Below the exact same posting in text format.... ------------------------------------------------------------------------ ------------------ Dear Subscribers, As most of you will already know, one can use get_user_pages to get a struct pages list of a certain user space buffer. While doing this, get_user_pages also locks the pages into physical mem (preventing them from being swapped out to disk, or moved within phys mem) for usage with e.g. DMA. Now here's my question: what happens if you call get_user_pages twice on the same buffer ? Will it keep track of how many times a page has been locked ? Meaning if I locked the same buffer "twice", will it still be locked when I unlock it once (using page_cache_release) ? Regards, Tom DISCLAIMER: Unless indicated otherwise, the information contained in this message is privileged and confidential, and is intended only for the use of the addressee(s) named above and others who have been specifically authorized to receive it. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message and/or attachments is strictly prohibited. The company accepts no liability for any damage caused by any virus transmitted by this email. Furthermore, the company does not warrant a proper and complete transmission of this information, nor does it accept liability for any delays. If you have received this message in error, please contact the sender and delete the message. Thank you. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
