Date: Wed, 26 Apr 2017 18:28:02 -0400 From: Zhuojia Shen <zshen10@cs.rochester.edu> To: freebsd-hackers@freebsd.org Subject: Allocate huge chunk of pageable memory in FreeBSD kernel space Message-ID: <2c616149-274d-b758-1500-ffd580fd51fd@cs.rochester.edu>
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Hi, I'm working on a project that uses FreeBSD 11.0 on amd64 to do some security research. Now what I want to achieve is to allocate an 8TB portion of memory within the kernel virtual address space using demand paging. I noticed that there is an unused portion of kernel space from 0xffff804020101000 to 0xfffff80000000000 where the 8TB structure will fit. I also noticed that there is a function kmap_alloc_wait() which can be used to allocate pageable memory. Do you suggest that I use this function and, if so, how would I use it? Thank you, Zhuojia -- Zhuojia Shen Graduate Student Department of Computer Science University of Rochester
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