Rokudo Yan 2395928158 zsmalloc: account the number of compacted pages correctly ... There exists multiple path may do zram compaction concurrently. 1. auto-compaction triggered during memory reclaim 2. userspace utils write zram<id>/compaction node So, multiple threads may call zs_shrinker_scan/zs_compact concurrently. But pages_compacted is a per zsmalloc pool variable and modification of the variable is not serialized(through under class->lock). There are two issues here: 1. the pages_compacted may not equal to total number of pages freed(due to concurrently add). 2. zs_shrinker_scan may not return the correct number of pages freed(issued by current shrinker). The fix is simple: 1. account the number of pages freed in zs_compact locally. 2. use actomic variable pages_compacted to accumulate total number. Link: https://lkml.kernel.org/r/20210202122235.26885-1-wu-yan@tcl.com Fixes: 860c707dca ("zsmalloc: account the number of compacted pages") Signed-off-by: Rokudo Yan <wu-yan@tcl.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2021-02-26 09:41:01 -08:00
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accessibility	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
acpi	pci-v5.12-changes	2021-02-25 09:56:08 -08:00
amba	…
android	…
ata	…
atm	…
auxdisplay	…
base	drivers/base/memory: don't store phys_device in memory blocks	2021-02-26 09:41:00 -08:00
bcma	…
block	zsmalloc: account the number of compacted pages correctly	2021-02-26 09:41:01 -08:00
bluetooth	…
bus	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
cdrom	…
char	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
clk	Driver core / debugfs update for 5.12-rc1	2021-02-24 10:13:55 -08:00
clocksource	A small set of clockevent fixes which fell through the cracks	2021-02-22 14:11:36 -08:00
connector	…
counter	…
cpufreq	Simple Firmware Interface (SFI) support removal for v5.12-rc1	2021-02-24 10:35:29 -08:00
cpuidle	…
crypto	…
cxl	cxl/mem: Fix potential memory leak	2021-02-22 14:44:39 -08:00
dax	Merge branch 'for-5.12/dax' into for-5.12/libnvdimm	2021-02-23 18:13:45 -08:00
dca	…
devfreq	…
dio	…
dma	dmaengine updates for v5.12-rc1	2021-02-23 15:05:10 -08:00
dma-buf	…
edac	…
eisa	…
extcon	…
firewire	…
firmware	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
fpga	…
fsi	…
gnss	…
gpio	Driver core / debugfs update for 5.12-rc1	2021-02-24 10:13:55 -08:00
gpu	Kbuild updates for v5.12	2021-02-25 10:17:31 -08:00
greybus	…
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid	2021-02-23 14:52:22 -08:00
hsi	…
hv	mm/memory_hotplug: MEMHP_MERGE_RESOURCE -> MHP_MERGE_RESOURCE	2021-02-26 09:41:00 -08:00
hwmon	Devicetree updates for v5.12:	2021-02-22 10:05:12 -08:00
hwspinlock	…
hwtracing	ARM updates for 5.12-rc1:	2021-02-22 14:27:07 -08:00
i2c	ARM updates for 5.12-rc1:	2021-02-22 14:27:07 -08:00
i3c	I3C for 5.12	2021-02-22 09:52:55 -08:00
ide	…
idle	…
iio	…
infiniband	…
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2021-02-23 14:56:23 -08:00
interconnect	…
iommu	dma-mapping updates for 5.12:	2021-02-24 09:54:24 -08:00
ipack	…
irqchip	…
isdn	…
leds	…
lightnvm	…
macintosh	…
mailbox	mailbox: arm_mhuv2: Skip calling kfree() with invalid pointer	2021-02-22 13:34:27 -06:00
mcb	…
md	- Fix DM integrity's HMAC support to provide enhanced security of	2021-02-22 10:22:54 -08:00
media	Fixes around VM_FPNMAP and follow_pfn	2021-02-22 17:45:02 -08:00
memory	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
memstick	…
message	…
mfd	Simple Firmware Interface (SFI) support removal for v5.12-rc1	2021-02-24 10:35:29 -08:00
misc	pci-v5.12-changes	2021-02-25 09:56:08 -08:00
mmc	ARM updates for 5.12-rc1:	2021-02-22 14:27:07 -08:00
most	…
mtd	…
mux	…
net	Kbuild updates for v5.12	2021-02-25 10:17:31 -08:00
nfc	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
ntb	NTB: Add support for EPF PCI Non-Transparent Bridge	2021-02-23 14:12:53 -06:00
nubus	…
nvdimm	libnvdimm + device-dax for 5.12	2021-02-24 09:35:54 -08:00
nvme	…
nvmem	…
of	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
opp	…
parisc	…
parport	…
pci	pci-v5.12-changes	2021-02-25 09:56:08 -08:00
pcmcia	…
perf	IOMMU Updates for Linux v5.12	2021-02-22 10:31:29 -08:00
phy	…
pinctrl	This is the bulk of pin control changes for the v5.12 kernel.	2021-02-22 18:39:11 -08:00
platform	Simple Firmware Interface (SFI) support removal for v5.12-rc1	2021-02-24 10:35:29 -08:00
pnp	…
power	…
powercap	…
pps	…
ps3	…
ptp	…
pwm	…
rapidio	…
ras	…
regulator	…
remoteproc	…
reset	…
rpmsg	…
rtc	ARM updates for 5.12-rc1:	2021-02-22 14:27:07 -08:00
s390	SCSI misc on 20210219	2021-02-22 10:24:58 -08:00
sbus	…
scsi	SCSI misc on 20210219	2021-02-22 10:24:58 -08:00
sh	…
siox	…
slimbus	…
soc	…
soundwire	…
spi	powerpc updates for 5.12	2021-02-22 14:34:00 -08:00
spmi	…
ssb	…
staging	Simple Firmware Interface (SFI) support removal for v5.12-rc1	2021-02-24 10:35:29 -08:00
target	SCSI misc on 20210219	2021-02-22 10:24:58 -08:00
tc	…
tee	…
thermal	…
thunderbolt	…
tty	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
uio	…
usb	Kbuild updates for v5.12	2021-02-25 10:17:31 -08:00
vdpa	…
vfio	VFIO updates for v5.12-rc1	2021-02-24 10:43:40 -08:00
vhost	…
video	video: fbdev: acornfb: remove free_unused_pages()	2021-02-24 13:38:31 -08:00
virt	…
virtio	virtio-mem: check against mhp_get_pluggable_range() which memory we can hotplug	2021-02-26 09:41:01 -08:00
visorbus	…
vlynq	…
vme	…
w1	…
watchdog	Char/Misc driver patches for 5.12-rc1	2021-02-24 10:25:37 -08:00
xen	mm/memory_hotplug: MEMHP_MERGE_RESOURCE -> MHP_MERGE_RESOURCE	2021-02-26 09:41:00 -08:00
zorro	…
Kconfig	…
Makefile	Simple Firmware Interface (SFI) support removal for v5.12-rc1	2021-02-24 10:35:29 -08:00