This commit changes rcutorture_runnable to torture_runnable, which is
consistent with the names of the other parameters and is a bit shorter
as well.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
We can easily do so with our new reader lock support. Just an arbitrary
design default: readers have higher (5x) critical region latencies than
writers: 50 ms and 10 ms, respectively.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Most of it is based on what we already have for writers. This allows
readers to be very independent (and thus configurable), enabling
future module parameters to control things such as rw distribution.
Furthermore, readers have their own delaying function, allowing us
to test different rw critical region latencies, and stress locking
internals. Similarly, statistics, for now will only serve for the
number of lock acquisitions -- as opposed to writers, readers have
no failure detection.
In addition, introduce a new nreaders_stress module parameter. The
default number of readers will be the same number of writers threads.
Writer threads are interleaved with readers. Documentation is updated,
respectively.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Add a "mutex_lock" torture test. The main difference with the already
existing spinlock tests is that the latency of the critical region
is much larger. We randomly delay for (arbitrarily) either 500 ms or,
otherwise, 25 ms. While this can considerably reduce the amount of
writes compared to non blocking locks, if run long enough it can have
the same torturous effect. Furthermore it is more representative of
mutex hold times and can stress better things like thrashing.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Just like Documentation/RCU/torture.txt, begin a document for the
locktorture module. This module is still pretty green, so I have
just added some specific sections to the doc (general desc, params,
usage, etc.). Further development should update the file.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
[ paulmck: Apply Randy Dunlap review comments. ]
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
MMU-401 is similar to MMU-400, but updated with limited ARMv8 support.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This patch adds ability to configure delay between transmission of
words over SPI bus if it's required by SPI slave devices.
New optional SPI slave property:
- ti,spi-word-delay : delay between transmission of words
(SPIFMTn.WDELAY, SPIDAT1.WDEL)
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Contributors are not listed in alphabetical order as claimed by documentation.
Signed-off-by: Oscar Utbult <oscar@oscr.io>
Signed-off-by: Mark Brown <broonie@kernel.org>
The following patch for megaraid_sas updates the driver version and
Documentation/scsi/ChangeLog.megaraid_sas.
Signed-off-by: Adam Radford <aradford@gmail.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
If user wrote F2FS_IPU_FSYNC:4 in /sys/fs/f2fs/ipu_policy, f2fs_sync_file
only starts to try in-place-updates.
And, if the number of dirty pages is over /sys/fs/f2fs/min_fsync_blocks, it
keeps out-of-order manner. Otherwise, it triggers in-place-updates.
This may be used by storage showing very high random write performance.
For example, it can be used when,
Seq. writes (Data) + wait + Seq. writes (Node)
is pretty much slower than,
Rand. writes (Data)
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
LTC2952 is an external power control chip, which signals
the OS to shut down. This patch documents the DT binding
for the chip.
Signed-off-by: René Moll <rene.moll@xsens.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
'unnecessary' was wrongly spelled as 'unncessary', also it should have been
'unnecessarily'.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Fixes "imx6q-pcie 1ffc000.pcie: missing *config* reg space"
error exposed by new versions of the designware pcie driver.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Pull input updates from Dmitry Torokhov:
"A few quirks for i8042/AT keyboards and a small device tree doc fix
for Atmel Touchscreens"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: atmel_mxt_ts - fix merge in DT documentation
Input: i8042 - also set the firmware id for MUXed ports
Input: i8042 - add nomux quirk for Avatar AVIU-145A6
Input: i8042 - add Fujitsu U574 to no_timeout dmi table
Input: atkbd - do not try 'deactivate' keyboard on any LG laptops
Aside of the usual boring core properties (compatible, reg, interrupts
and clocks), the bindings use the OF graph bindings to model connections
between the DU output video ports and the on-board and off-board
components.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
The THC63LVDM83D is a video LVDS serializer described by an input port,
an output port, and an optional power down GPIO.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
The ADV7123 is a video DAC described by an input port, an output port,
and an optional power save GPIO.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This fixes a merge conflict in lustre, and we want the other fixes that
went into 3.17-rc5 as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch update fec devicetree binding doc that add Optional
properties "fsl,num-tx-queues" and "fsl,num-rx-queues".
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Reference to RK3288 TRM, fix an error channel id for i2s tx and rx
Table 10-1 DMAC_BUS Request Mapping Table
Req number Source Polarity
0 I2S tx High level
1 I2S rx High level
Tested on RK3288 board.
Signed-off-by: Jianqun <jay.xu@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
QCOM USB3.0 core wrapper consist of USB3.0 IP from Synopsys
(SNPS) and HS, SS PHY's control and configuration registers.
It could operate in device mode (SS, HS, FS) and host
mode (SS, HS, FS, LS).
Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Pull USB fixes from Greg KH:
"Here are some USB and PHY fixes for 3.17-rc5.
Nothing major here, just a number of tiny fixes for reported issues,
and some new device ids as well.
All have been tested in linux-next"
* tag 'usb-3.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (46 commits)
xhci: fix oops when xhci resumes from hibernate with hw lpm capable devices
usb: xhci: Fix OOPS in xhci error handling code
xhci: Fix null pointer dereference if xhci initialization fails
storage: Add single-LUN quirk for Jaz USB Adapter
uas: Add missing le16_to_cpu calls to asm1051 / asm1053 usb-id check
usb: chipidea: msm: Initialize PHY on reset event
usb: chipidea: msm: Use USB PHY API to control PHY state
usb: hub: take hub->hdev reference when processing from eventlist
uas: Disable uas on ASM1051 devices
usb: dwc2/gadget: avoid disabling ep0
usb: dwc2/gadget: delay enabling irq once hardware is configured properly
usb: dwc2/gadget: do not call disconnect method in pullup
usb: dwc2/gadget: break infinite loop in endpoint disable code
usb: dwc2/gadget: fix phy initialization sequence
usb: dwc2/gadget: fix phy disable sequence
uwb: init beacon cache entry before registering uwb device
USB: ftdi_sio: Add support for GE Healthcare Nemo Tracker device
USB: document the 'u' flag for usb-storage quirks parameter
usb: host: xhci: fix compliance mode workaround
usb: dwc3: fix TRB completion when multiple TRBs are started
...
Pull fbdev fixes from Tomi Valkeinen:
"Minor fixes for amba-clcd and video DT bindings"
* tag 'fbdev-fixes-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
video: ARM CLCD: Fix color model capabilities for DT platforms
video: fix composite video connector compatible string
