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In low memory situations, page allocations for bulk read can kill applications for reclaiming memory, and print an failure message when allocations are failed. Because bulk read is just an optimization, we don't have to do these and can stop page allocations. Though this siutation happens rarely, add __GFP_NORETRY to prevent from excessive memory reclaim and killing applications, and __GFP_WARN to suppress this failure message. For this, Use readahead_gfp_mask for gfp flags when allocating pages. Signed-off-by: Hyunchul Lee <cheol.lee@lge.com> Signed-off-by: Richard Weinberger <richard@nod.at>
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.