• Dan Streetman's avatar
    zsmalloc: simplify init_zspage free obj linking · 5538c562
    Dan Streetman authored
    Change zsmalloc init_zspage() logic to iterate through each object on each
    of its pages, checking the offset to verify the object is on the current
    page before linking it into the zspage.
    
    The current zsmalloc init_zspage free object linking code has logic that
    relies on there only being one page per zspage when PAGE_SIZE is a
    multiple of class->size.  It calculates the number of objects for the
    current page, and iterates through all of them plus one, to account for
    the assumed partial object at the end of the page.  While this currently
    works, the logic can be simplified to just link the object at each
    successive offset until the offset is larger than PAGE_SIZE, which does
    not rely on PAGE_SIZE being a multiple of class->size.
    Signed-off-by: default avatarDan Streetman <ddstreet@ieee.org>
    Acked-by: default avatarMinchan Kim <minchan@kernel.org>
    Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
    Cc: Nitin Gupta <ngupta@vflare.org>
    Cc: Seth Jennings <sjennings@variantweb.net>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    5538c562
zsmalloc.c 30.1 KB