Bart Van Assche
be4d2b4562
loop: Select I/O scheduler 'none' from inside add_disk() ...
commit 2112f5c1330a671fa852051d85cb9eadc05d7eb7 upstream.
We noticed that the user interface of Android devices becomes very slow
under memory pressure. This is because Android uses the zram driver on top
of the loop driver for swapping, because under memory pressure the swap
code alternates reads and writes quickly, because mq-deadline is the
default scheduler for loop devices and because mq-deadline delays writes by
five seconds for such a workload with default settings. Fix this by making
the kernel select I/O scheduler 'none' from inside add_disk() for loop
devices. This default can be overridden at any time from user space,
e.g. via a udev rule. This approach has an advantage compared to changing
the I/O scheduler from userspace from 'mq-deadline' into 'none', namely
that synchronize_rcu() does not get called.
This patch changes the default I/O scheduler for loop devices from
'mq-deadline' into 'none'.
Additionally, this patch reduces the Android boot time on my test setup
with 0.5 seconds compared to configuring the loop I/O scheduler from user
space.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Martijn Coenen <maco@android.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20210805174200.3250718-3-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-11 11:53:54 +02:00
ACPI: processor: perflib: Avoid updating frequency QoS unnecessarily
2023-08-11 11:53:53 +02:00
binder: fix UAF caused by faulty buffer cleanup
2023-06-05 08:17:33 +02:00
ata: pata_ns87415: mark ns87560_tf_read static
2023-08-11 11:53:49 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
x86/speculation: Add Gather Data Sampling mitigation
2023-08-08 19:56:35 +02:00
loop: Select I/O scheduler 'none' from inside add_disk()
2023-08-11 11:53:54 +02:00
Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"
2023-05-17 11:35:45 +02:00
bus: imx-weim: fix branch condition evaluates to a garbage value
2023-04-05 11:16:42 +02:00
tpm_tis: Explicitly check for error code
2023-08-11 11:53:52 +02:00
clk: keystone: sci-clk: check return value of kasprintf()
2023-07-27 08:37:15 +02:00
clocksource/drivers/cadence-ttc: Fix memory leak in ttc_timer_probe
2023-07-27 08:37:05 +02:00
counter: 104-quad-8: Fix race condition between FLAG and CNTR reads
2023-05-17 11:35:31 +02:00
cpufreq: intel_pstate: Drop ACPI _PSS states table patching
2023-08-11 11:53:53 +02:00
crypto: marvell/cesa - Fix type mismatch warning
2023-07-27 08:37:18 +02:00
dmaengine: pl330: rename _start to prevent build error
2023-06-09 10:28:52 +02:00
EDAC/skx: Fix overflows on the DRAM row address mapping arrays
2023-05-17 11:35:35 +02:00
extcon: Fix kernel doc of property capability fields to avoid warnings
2023-07-27 08:37:20 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
firmware: stratix10-svc: Fix a potential resource leak in svc_create_memory_pool()
2023-07-27 08:37:37 +02:00
fpga: bridge: fix kernel-doc parameter description
2023-05-17 11:35:46 +02:00
gpio: tps68470: Make tps68470_gpio_output() always set the initial value
2023-08-11 11:53:44 +02:00
drm/msm: Fix IS_ERR_OR_NULL() vs NULL check in a5xx_submit_in_rb()
2023-08-11 11:53:49 +02:00
HID: wacom: Use ktime_t rather than int when dealing with timestamps
2023-07-27 08:37:03 +02:00
Drivers: hv: vmbus: Fix vmbus_wait_for_unload() to scan present CPUs
2023-06-28 10:18:36 +02:00
hwmon: (nct7802) Fix for temp6 (PECI1) processed even if PECI1 disabled
2023-08-11 11:53:52 +02:00
coresight: Fix signedness bug in tmc_etr_buf_insert_barrier_packet()
2023-05-30 12:44:10 +01:00
i2c: xiic: Don't try to handle more interrupt events after error
2023-07-27 08:37:24 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
meson saradc: fix clock divider mask length
2023-07-27 08:37:38 +02:00
RDMA/mlx4: Make check for invalid flags stricter
2023-08-11 11:53:48 +02:00
Input: adxl34x - do not hardcode interrupt trigger type
2023-07-27 08:37:13 +02:00
interconnect: fix mem leak when freeing nodes
2023-03-22 13:28:08 +01:00
iommu/amd: Don't block updates to GATag if guest mode is on
2023-06-09 10:28:52 +02:00
irq-bcm6345-l1: Do not assume a fixed block to cpu mapping
2023-08-11 11:53:52 +02:00
leds: TI_LMU_COMMON: select REGMAP instead of depending on it
2023-05-17 11:35:53 +02:00
macintosh: via-pmu-led: requires ATA to be set
2023-05-17 11:35:50 +02:00
mailbox: ti-msgmgr: Fill non-message tx data fields with 0x0
2023-07-27 08:37:23 +02:00
mcb-pci: Reallocate memory region to avoid memory overlapping
2023-05-30 12:44:04 +01:00
dm cache policy smq: ensure IO doesn't prevent cleaner policy progress
2023-08-11 11:53:53 +02:00
media: usb: siano: Fix warning due to null work_func_t function pointer
2023-07-27 08:37:20 +02:00
memory: brcmstb_dpfe: fix testing array offset after use
2023-07-27 08:37:14 +02:00
memstick r592: make memstick_debug_get_tpc_name() static
2023-07-27 08:37:10 +02:00
scsi: message: mptlan: Fix use after free bug in mptlan_remove() due to race condition
2023-05-30 12:44:03 +01:00
mfd: stmpe: Only disable the regulators if they are enabled
2023-07-27 08:37:22 +02:00
misc: pci_endpoint_test: Re-init completion for every test
2023-07-27 08:37:37 +02:00
mmc: sdhci: fix DMA configure compatibility issue when 64bit DMA mode is used.
2023-07-27 08:37:25 +02:00
mtd: rawnand: meson: fix unaligned DMA buffers handling
2023-07-27 08:37:34 +02:00
virtio-net: fix race between set queues and probe
2023-08-11 11:53:52 +02:00
nfcsim.c: Fix error checking for debugfs_create_dir
2023-06-28 10:18:41 +02:00
NTB: ntb_tool: Add check for devm_kcalloc
2023-07-27 08:37:32 +02:00
nvme-fcloop: fix "inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage"
2023-05-17 11:35:43 +02:00
of: Fix modalias string generation
2023-05-17 11:35:47 +02:00
PCI/ASPM: Avoid link retraining race
2023-08-11 11:53:45 +02:00
phy: hisilicon: Fix an out of bounds check in hisi_inno_phy_probe()
2023-08-11 11:53:47 +02:00
pinctrl: amd: Use amd_pinconf_set() for all config options
2023-07-27 08:37:43 +02:00
platform/x86: msi-laptop: Fix rfkill out-of-sync on MSI Wind U100
2023-08-11 11:53:48 +02:00
power: supply: Fix logic checking if system is running from battery
2023-06-21 15:44:09 +02:00
powercap: RAPL: Fix CONFIG_IOSF_MBI dependency
2023-07-27 08:37:06 +02:00
ptp_qoriq: fix memory leak in probe()
2023-04-05 11:16:43 +02:00
pwm: meson: fix handling of period/duty if greater than UINT_MAX
2023-08-11 11:53:46 +02:00
regulator: core: Streamline debugfs operations
2023-07-27 08:37:07 +02:00
remoteproc: st: Call of_node_put() on iteration error
2023-05-17 11:36:01 +02:00
rtc: st-lpc: Release some resources in st_rtc_probe() in case of error
2023-07-27 08:37:22 +02:00
s390/dasd: fix hanging device after quiesce/resume
2023-08-11 11:53:53 +02:00
scsi: qla2xxx: Array index may go out of bound
2023-08-11 11:53:46 +02:00
soc/fsl/qe: fix usb.c build errors
2023-07-27 08:37:14 +02:00
spi: bcm63xx: fix max prepend length
2023-07-27 08:37:43 +02:00
spmi: Add a check for remove callback when removing a SPMI driver
2023-05-17 11:35:49 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
staging: ks7010: potential buffer overflow in ks_wlan_set_encode_ext()
2023-08-11 11:53:52 +02:00
scsi: target: iscsi: Prevent login threads from racing between each other
2023-06-28 10:18:40 +02:00
thermal: intel: BXT_PMIC: select REGMAP instead of depending on it
2023-03-11 16:44:13 +01:00
thunderbolt: Use const qualifier for ring_interrupt_index
2023-04-05 11:16:39 +02:00
serial: sifive: Fix sifive_serial_console_setup() section
2023-08-11 11:53:50 +02:00
Revert "usb: xhci: tegra: Fix error check"
2023-08-11 11:53:51 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
fbdev: au1200fb: Fix missing IRQ check in au1200fb_drv_probe
2023-07-27 08:37:44 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
w1: fix loop in w1_fini()
2023-07-27 08:37:19 +02:00
watchdog: menz069_wdt: fix watchdog initialisation
2023-06-09 10:28:55 +02:00
xen/pvcalls-back: fix double frees with pvcalls_new_active_socket()
2023-05-30 12:44:10 +01:00
be4d2b4562