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Some nommu systems have RAM at address 0. When vectors are not located there, the very beginning of memory remains available for dynamic allocations. The memblock allocator explicitly skips the first page but the standard page allocator does not, and while it correctly returns a non-null struct page pointer for that page, page_address() gives 0 which gets confused with NULL (out of memory) by callers despite having plenty of free memory left. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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.