Bugtraq mailing list archives
Re: win32/memory locking (Re: Reply to EFS note on Bugtraq)
From: James Perry <jeperry () UWATERLOO CA>
Date: Wed, 24 Jan 2001 09:15:01 +0000
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Bits _never_ get written to the disk? Guaranteed never to use swap space? The GnuPG FAQ (http://www.gnupg.org/faq.html#q6.1) suggests that it is not possible to make a Windows program insist on physical RAM the way a program can in Open Systems. Does EFS really use only physical RAM? If so, is there some win32 API that can be used by other application designers who want to guarantee that certain blocks of allocated memory are *never* swapped out to disk? The most likely candidate I've come across is VirtualLock() which, unfortunately, "does not mean that the page will not be paged to disk" (http://msdn.microsoft.com/library/techart/msdn_virtmm.htm). Thanks, -Peter
As described on the MSDN site: "The AllocateUserPhysicalPages function is used to allocate physical memory. Memory allocated by this function must be physically present in the system. Once allocated, it is locked down and unavailable to the rest of the virtual memory management system of Windows 2000." _http://msdn.microsoft.com/library/psdk/winbase/memman_0u5v.htm_ The UserPhysicalPages class of functions appear to be directly related to kernel calls, so I'd take a guess and say it's probably what you're looking for. - James Perry -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (GNU/Linux) Comment: pgpenvelope 2.9.0 - http://pgpenvelope.sourceforge.net/ iD8DBQE6bp0ds6J9OMPOxE8RAki4AKCiTWweQkkvcRWBqUyXJDQEFu8yngCfYNP8 f/adsAYRzRYstL63pJZSZbo= =g2j5 -----END PGP SIGNATURE-----
Current thread:
- Reply to EFS note on Bugtraq Ryan Russell (Jan 23)
- win32/memory locking (Re: Reply to EFS note on Bugtraq) Peter W (Jan 23)
- Re: win32/memory locking (Re: Reply to EFS note on Bugtraq) James Perry (Jan 24)
- Re: win32/memory locking (Re: Reply to EFS note on Bugtraq) Keith Ray (Jan 24)
- Re: win32/memory locking (Re: Reply to EFS note on Bugtraq) James Perry (Jan 24)
- win32/memory locking (Re: Reply to EFS note on Bugtraq) Peter W (Jan 23)