tree 0a0fa79efe9fcda15eaae41f4735e7afee01c55c
parent 4aa409cab7c39c90f4b725ff22f52bbf5d2fc4e0
author Minchan Kim <minchan@kernel.org> 1469571808 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1469575159 -0700

zsmalloc: use freeobj for index

Zsmalloc stores first free object's <PFN, obj_idx> position into freeobj
in each zspage.  If we change it with index from first_page instead of
position, it makes page migration simple because we don't need to
correct other entries for linked list if a page is migrated out.

Link: http://lkml.kernel.org/r/1464736881-24886-11-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>