Minchan Kim
2e264fb546
zram: support BDI_CAP_STABLE_WRITES ...
commit b09ab054b69b07077bd3292f67e777861ac796e5 upstream.
zram has used per-cpu stream feature from v4.7. It aims for increasing
cache hit ratio of scratch buffer for compressing. Downside of that
approach is that zram should ask memory space for compressed page in
per-cpu context which requires stricted gfp flag which could be failed.
If so, it retries to allocate memory space out of per-cpu context so it
could get memory this time and compress the data again, copies it to the
memory space.
In this scenario, zram assumes the data should never be changed but it is
not true without stable page support. So, If the data is changed under
us, zram can make buffer overrun so that zsmalloc free object chain is
broken so system goes crash like below
https://bugzilla.suse.com/show_bug.cgi?id=997574
This patch adds BDI_CAP_STABLE_WRITES to zram for declaring "I am block
device needing *stable write*".
Fixes: da9556a236http://lkml.kernel.org/r/1482366980-3782-4-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Hyeoncheol Lee <cheol.lee@lge.com>
Cc: <yjay.kim@lge.com>
Cc: Sangseok Lee <sangseok.lee@lge.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-19 20:17:58 +01:00
ACPI / video: Add force_native quirk for HP Pavilion dv6
2017-01-09 08:32:18 +01:00
ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct
2016-10-24 19:37:48 +02:00
libata-scsi: disable SCT Write Same for the moment
2016-12-07 16:29:09 -05:00
atm: fix improper return value
2016-12-05 14:53:46 -05:00
auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays
2016-10-06 17:03:41 +02:00
PM / wakeirq: Fix dedicated wakeirq for drivers not using autosuspend
2017-01-12 11:39:31 +01:00
zram: support BDI_CAP_STABLE_WRITES
2017-01-19 20:17:58 +01:00
Bluetooth: btwilink: Fix probe return value
2016-10-20 10:14:49 +02:00
bus: arm-ccn: Prevent hotplug callback leak
2017-01-15 13:42:57 +01:00
tpm_tis: Check return values from get_burstcount.
2017-01-12 11:39:38 +01:00
ARM: 8631/1: clkdev: Detect errors in clk_hw_register_clkdev() for mass registration
2017-01-15 13:42:57 +01:00
Revert "clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init"
2016-10-20 21:58:58 +02:00
PM / OPP: Pass opp_table to dev_pm_opp_put_regulator()
2017-01-06 10:40:15 +01:00
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2016-10-15 09:26:12 -07:00
crypto: caam - fix AEAD givenc descriptors
2017-01-06 10:40:13 +01:00
device-dax: fix private mapping restriction, permit read-only
2016-12-06 17:42:37 -08:00
PM / devfreq: Skip status update on uninitialized previous_freq
2016-10-11 00:01:20 +02:00
dmaengine: cppi41: More PM runtime fixes
2016-11-17 16:09:23 +05:30
Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux
2016-10-11 18:12:22 -07:00
* Altera Arria10 enablement of NAND, DMA, USB, QSPI and SD-MMC FIFO
2016-10-04 12:06:26 -07:00
extcon: qcom-spmi-misc: Sync the extcon state on interrupt
2016-10-26 16:04:29 +09:00
firewire: net: fix fragmented datagram_size off-by-one
2016-11-03 14:46:39 +01:00
efi/efivar_ssdt_load: Don't return success on allocation failure
2017-01-12 11:39:24 +01:00
gpio: chardev: Return error for seek operations
2017-01-09 08:32:18 +01:00
drm/savage: dereferencing an error pointer
2017-01-19 20:17:58 +01:00
HID: hid-cypress: validate length of report
2017-01-15 13:42:56 +01:00
hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels()
2017-01-09 08:32:18 +01:00
hwmon: (lm90) fix temp1_max_alarm attribute
2017-01-12 11:39:26 +01:00
stm class: Fix device leak in open error path
2017-01-09 08:32:21 +01:00
Revert "i2c: octeon: thunderx: Limit register access retries"
2016-11-29 20:04:21 +01:00
nmi_backtrace: generate one-line reports for idle cpus
2016-10-07 18:46:30 -07:00
iio: accel: st_accel: fix LIS3LV02 reading and scaling
2017-01-12 11:39:21 +01:00
i40iw: Use correct src address in memcpy to rdma stats counters
2017-01-09 08:32:24 +01:00
Input: i8042 - add Pegatron touchpad to noloop table
2017-01-19 20:17:57 +01:00
iommu/vt-d: Flush old iommu caches for kdump when the device gets context mapped
2017-01-12 11:39:28 +01:00
ipack: print a hex number after a 0x prefix
2016-10-27 18:43:43 -07:00
irqchip/bcm7038-l1: Implement irq_cpu_offline() callback
2017-01-12 11:39:31 +01:00
ser_gigaset: return -ENOMEM on error instead of success
2016-12-08 14:19:17 -05:00
Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block
2016-10-07 14:42:05 -07:00
mailbox: PCC: Fix lockdep warning when request PCC channel
2016-11-14 22:07:38 +01:00
md: fix refcount problem on mddev when stopping array.
2017-01-12 11:39:35 +01:00
dibusb: fix possible memory leak in dibusb_rc_query()
2017-01-12 11:39:20 +01:00
ARM: SoC driver updates for v4.9
2016-10-07 21:23:40 -07:00
memstick: rtsx_usb_ms: Manage runtime PM when accessing the device
2016-10-17 15:43:05 +02:00
mfd: tps65217: Fix page fault on unloading modules
2017-01-12 11:39:23 +01:00
mei: move write cb to completion on credentials failures
2017-01-12 11:39:21 +01:00
mmc: mmc_test: Uninitialized return value
2017-01-12 11:39:31 +01:00
MTD updates for 4.9-rc4:
2016-11-05 10:52:29 -07:00
rtlwifi: rtl_usb: Fix missing entry in USB driver's private data
2017-01-15 13:42:58 +01:00
mei: bus: fix received data size check in NFC fixup
2016-10-31 10:25:22 -06:00
ntb_perf: potential info leak in debugfs
2016-11-13 16:48:30 -05:00
libnvdimm, pfn: fix align attribute
2017-01-09 08:32:25 +01:00
nvmet: Fix possible infinite loop triggered on hot namespace removal
2017-01-06 10:40:14 +01:00
ARM: SoC driver updates for v4.9
2016-10-07 21:23:40 -07:00
of, numa: Return NUMA_NO_NODE from disable of_node_to_nid() if nid not possible.
2017-01-09 08:32:25 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
powerpc/pci/rpadlpar: Fix device reference leaks
2017-01-12 11:39:37 +01:00
pcmcia: fix return value of soc_pcmcia_regulator_set
2016-11-11 08:45:08 -08:00
perf: xgene: Remove bogus IS_ERR() check
2016-10-17 15:50:07 +01:00
phy: twl4030-usb: Fix for musb session bit based PM
2016-11-17 16:25:40 +01:00
pinctrl: sh-pfc: Add helper to handle bias lookup table
2017-01-19 20:17:57 +01:00
platform/x86: fujitsu-laptop: use brightness_set_blocking for LED-setting callbacks
2017-01-12 11:39:25 +01:00
power supply and reset changes for the v4.9 series
2016-10-06 18:21:15 -07:00
pps: kc: fix non-tickless system config dependency
2016-10-11 15:06:32 -07:00
drivers/ptp: Fix kernel memory disclosure
2016-10-13 10:20:06 -04:00
pwm: Fix device reference leak
2016-11-29 16:43:24 +01:00
mm: replace get_user_pages() write/force parameters with gup_flags
2016-10-19 08:11:43 -07:00
regulator: axp20x: Fix axp809 ldo_io registration error on cold boot
2017-01-19 20:17:57 +01:00
rpmsg updates for v4.9
2016-10-06 17:03:49 -07:00
reset: uniphier: rename MIO reset to SD reset for Pro5, PXs2, LD20 SoCs
2016-10-22 18:31:42 +09:00
rpmsg: qcom_smd: Correct return value for O_NONBLOCK
2017-01-12 11:39:31 +01:00
rtc: omap: prevent disabling of clock/module during suspend
2016-11-04 23:11:39 +01:00
s390/vmlogrdr: fix IUCV buffer allocation
2017-01-09 08:32:22 +01:00
scsi: mvsas: fix command_active typo
2017-01-12 11:39:29 +01:00
powerpc updates for 4.9 #2
2016-10-14 11:07:42 -07:00
spi: mvebu: fix baudrate calculation for armada variant
2017-01-15 13:42:57 +01:00
ssb: Fix error routine when fallback SPROM fails
2017-01-09 08:32:16 +01:00
staging: media: davinci_vpfe: unlock on error in vpfe_reqbufs()
2017-01-12 11:39:35 +01:00
sbp-target: Fix second argument of percpu_ida_alloc()
2017-01-12 11:39:30 +01:00
thermal: hwmon: Properly report critical temperature in sysfs
2017-01-09 08:32:18 +01:00
sc16is7xx: Drop bogus use of IRQF_ONESHOT
2017-01-09 08:32:22 +01:00
usb: gadget: composite: always set ep->mult to a sensible value
2017-01-12 11:39:46 +01:00
uwb: fix device reference leaks
2016-11-01 09:04:04 -06:00
vfio/pci: Fix integer overflows, bitmask check
2016-10-26 13:49:29 -06:00
vhost-vsock: fix orphan connection reset
2016-12-08 21:24:30 -05:00
video: ARM CLCD: fix Vexpress regression
2016-11-03 12:20:14 +02:00
mm: replace get_user_pages() write/force parameters with gup_flags
2016-10-19 08:11:43 -07:00
virtio_ring: mark vring_dma_dev inline
2016-10-31 00:40:08 +02:00
vme: vme_get_size potentially returning incorrect value on failure
2016-10-28 08:25:18 -04:00
watchdog: qcom: fix kernel panic due to external abort on non-linefetch
2017-01-06 10:40:16 +01:00
xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing
2017-01-06 10:40:17 +01:00
A small bug fix and a new driver for acting as an IPMI device.
2016-10-23 15:56:23 -07:00
2e264fb546