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Maximum page order can be at max 10 which can be accomodated in short data type(2 bytes). last_migrate_reason is defined as enum type whose values can be accomodated in short data type (2 bytes). Total structure size is currently 16 bytes but after changing structure size it goes to 12 bytes. Vlastimil said: "Looks like it works, so why not. Before: [ 0.001000] allocated 50331648 bytes of page_ext After: [ 0.001000] allocated 41943040 bytes of page_ext" Link: http://lkml.kernel.org/r/1507623917-37991-1-git-send-email-ayush.m@samsung.com Signed-off-by: Ayush Mittal <ayush.m@samsung.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Vinayak Menon <vinmenon@codeaurora.org> Cc: Amit Sahrawat <a.sahrawat@samsung.com> Cc: Vaneet Narang <v.narang@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.