zram/zcomp: do not zero out zcomp private pages
authorSergey Senozhatsky <sergey.senozhatsky@gmail.com>
Thu, 14 Jan 2016 23:22:35 +0000 (15:22 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 15 Jan 2016 19:40:52 +0000 (11:40 -0800)
commite02d238c9852a91b30da9ea32ce36d1416cdc683
tree71086a6b6dfef99f3d446d477fe0d1124e860916
parent75d8947a36d0c9aedd69118d1f14bf424005c7c2
zram/zcomp: do not zero out zcomp private pages

Do not __GFP_ZERO allocated zcomp ->private pages.  We keep allocated
streams around and use them for read/write requests, so we supply a
zeroed out ->private to compression algorithm as a scratch buffer only
once -- the first time we use that stream.  For the rest of IO requests
served by this stream ->private usually contains some temporarily data
from the previous requests.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/block/zram/zcomp_lz4.c
drivers/block/zram/zcomp_lzo.c