Sergey Senozhatsky 49c3b184dc BACKPORT: zram: drop max_zpage_size and use zs_huge_class_size() ... Remove ZRAM's enforced "huge object" value and use zsmalloc huge-class watermark instead, which makes more sense. TEST - I used a 1G zram device, LZO compression back-end, original data set size was 444MB. Looking at zsmalloc classes stats the test ended up to be pretty fair. BASE ZRAM/ZSMALLOC ===================== zram mm_stat 498978816 191482495 199831552 0 199831552 15634 0 zsmalloc classes class size almost_full almost_empty obj_allocated obj_used pages_used pages_per_zspage freeable ... 151 2448 0 0 1240 1240 744 3 0 168 2720 0 0 4200 4200 2800 2 0 190 3072 0 0 10100 10100 7575 3 0 202 3264 0 0 380 380 304 4 0 254 4096 0 0 10620 10620 10620 1 0 Total 7 46 106982 106187 48787 0 PATCHED ZRAM/ZSMALLOC ===================== zram mm_stat 498978816 182579184 194248704 0 194248704 15628 0 zsmalloc classes class size almost_full almost_empty obj_allocated obj_used pages_used pages_per_zspage freeable ... 151 2448 0 0 1240 1240 744 3 0 168 2720 0 0 4200 4200 2800 2 0 190 3072 0 0 10100 10100 7575 3 0 202 3264 0 0 7180 7180 5744 4 0 254 4096 0 0 3820 3820 3820 1 0 Total 8 45 106959 106193 47424 0 As we can see, we reduced the number of objects stored in class-4096, because a huge number of objects which we previously forcibly stored in class-4096 now stored in non-huge class-3264. This results in lower memory consumption: - zsmalloc now uses 47424 physical pages, which is less than 48787 pages zsmalloc used before. - objects that we store in class-3264 share zspages. That's why overall the number of pages that both class-4096 and class-3264 consumed went down from 10924 to 9564. [sergey.senozhatsky.work@gmail.com: add pool param to zs_huge_class_size()] Link: http://lkml.kernel.org/r/20180314081833.1096-3-sergey.senozhatsky@gmail.com Link: http://lkml.kernel.org/r/20180306070639.7389-3-sergey.senozhatsky@gmail.com Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> (cherry picked from commit 60f5921a9a) Signed-off-by: Peter Kalauskas <peskal@google.com> Bug: 113183619 Change-Id: I1d3ede25543e99a24802ad03f68995f33aaf79b5 Signed-off-by: Amit Pundir <amit.pundir@linaro.org>		2018-10-04 14:17:09 +05:30
..
aoe
drbd	drbd: fix access after free	2018-07-11 16:03:48 +02:00
mtip32xx
paride	cdrom: do not call check_disk_change() inside cdrom_open()	2018-05-30 07:49:13 +02:00
rsxx
xen-blkback
zram	BACKPORT: zram: drop max_zpage_size and use zs_huge_class_size()	2018-10-04 14:17:09 +05:30
amiflop.c
ataflop.c
brd.c
cciss_cmd.h
cciss_scsi.c
cciss_scsi.h
cciss.c
cciss.h
cpqarray.c
cpqarray.h
cryptoloop.c
DAC960.c
DAC960.h
floppy.c
hd.c
ida_cmd.h
ida_ioctl.h
Kconfig
loop.c	loop: remember whether sysfs_create_group() was done	2018-07-17 11:31:46 +02:00
loop.h	loop: remember whether sysfs_create_group() was done	2018-07-17 11:31:46 +02:00
Makefile
mg_disk.c
nbd.c
null_blk.c
osdblk.c
pktcdvd.c
ps3disk.c
ps3vram.c
rbd_types.h
rbd.c
skd_main.c
skd_s1120.h
smart1,2.h
sunvdc.c
swim_asm.S
swim.c
swim3.c
sx8.c
umem.c
umem.h
virtio_blk.c
xen-blkfront.c
xsysace.c
z2ram.c