Date: Mon, 23 Jun 2014 13:52:09 +0400 From: Dmitry Sivachenko <trtrmitya@gmail.com> To: hackers@freebsd.org Subject: mlock() and vm_max_wired Message-ID: <D85BD1F5-414C-45FA-B509-C55DC9BE125A@gmail.com>
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Hello! I am using FreeBSD-10/stable and have a problem with mlock(). I have 256GB of memory and a program which does mmap+mlock on a number of data files. It can process one file several times (so it does mmap() + mlock() on the same file more than once). I set vm.max_wired=67108864 (67108864 * 4k = 256GB), so it is allowed to mlock() the whole RAM. The total size of all files is about 180GB. The program fails with mlock: Resource temporarily unavailable error. If I increase vm.max_wired even more, the program works fine and after it starts top(1) shows about 186GB of Wired memory. Why does it fail with vm.max_wired=67108864? Is it a bug or am I missing something? Thanks.
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