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Matthew Wilcox (Oracle)
4101196b19
Transparent Huge Pages are currently stored in i_pages as pointers to consecutive subpages. This patch changes that to storing consecutive pointers to the head page in preparation for storing huge pages more efficiently in i_pages. Large parts of this are "inspired" by Kirill's patch https://lore.kernel.org/lkml/[email protected]/ Kirill and Huang Ying contributed several fixes. [[email protected]: use compound_nr, squish uninit-var warning] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Matthew Wilcox <[email protected]> Acked-by: Jan Kara <[email protected]> Reviewed-by: Kirill Shutemov <[email protected]> Reviewed-by: Song Liu <[email protected]> Tested-by: Song Liu <[email protected]> Tested-by: William Kucharski <[email protected]> Reviewed-by: William Kucharski <[email protected]> Tested-by: Qian Cai <[email protected]> Tested-by: Mikhail Gavrilov <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Chris Wilson <[email protected]> Cc: Song Liu <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>