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6a0b41d1e2
The compat (32bit) mmap() sycall issued by a 64-bit task results in a mapping above 4GB. That's outside the compat mode address space and prevents CRIU to restore 32bit processes from a 64bit application. As a first step to address this, split out the address base randomizing calculation from arch_mmap_rnd() into a helper function, which can be used independent of mmap_ia32() based decisions. [ tglx: Massaged changelog ] Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com> Cc: 0x7f454c46@gmail.com Cc: linux-mm@kvack.org Cc: Andy Lutomirski <luto@kernel.org> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Borislav Petkov <bp@suse.de> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Link: http://lkml.kernel.org/r/20170306141721.9188-2-dsafonov@virtuozzo.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.