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2014-11-11[media] smiapp: Only some selection targets are settableSakari Ailus
Setting a non-settable selection target caused BUG() to be called. The check for valid selections only takes the selection target into account, but does not tell whether it may be set, or only get. Fix the issue by simply returning an error to the user. Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi> Cc: stable@vger.kernel.org # for v3.10 and up Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2014-11-11drm/i915: Fix obj->map_and_fenceable across tiling changesChris Wilson
As obj->map_and_fenceable computation has changed to only be set when the object is bound inside the global GTT (and is suitable aligned to a fence region) we need to accommodate those changes when the tiling is adjusted. The easiest solution is to unbind from the global GTT if we are currently fenceable, but will not be after the tiling change. The bug has been exposed by commit f8fcadba218fe6d23b2e353fea1cf0a4be4c9454 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Fri Oct 31 13:53:52 2014 +0000 drm/i915: Only mark as map-and-fenceable when bound into the GGTT which tried to fix an oversight from commit e6a844687cf929ec053c7578d5ecc794a8a6c5cf Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon Aug 11 12:00:12 2014 +0200 drm/i915: Force CPU relocations if not GTT mapped which changed the handling of obj->map_and_fenceable. Note that the alignment check is a vestige from our attempts to reduce the alignment requirements of tiled but unfenced buffers on gen2/3. Also, that was when unbinding from the GTT meant UC writes and clflushing, so we went to great pains to avoid such. That leaves the actual bug of setting map_and_fenceable to true if we're not bound to ggtt, which violates the change introduced in the above patch. Unbinding in that case really looks like the simplest and safest option, we have to do it anyway. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85896 Testcase: igt/gem_concurrent_blit/gttX* Tested-by: huax.lu@intel.com Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Tested-by: Valtteri Rantala <valtteri.rantala@intel.com> [Jani: amend commit message per input from Daniel and bisect result from Valtteri] Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2014-11-11param: fix crash on bad kernel argumentsDaniel Thompson
Currently if the user passes an invalid value on the kernel command line then the kernel will crash during argument parsing. On most systems this is very hard to debug because the console hasn't been initialized yet. This is a regression due to commit 51e158c12aca ("param: hand arguments after -- straight to init") which, in response to the systemd debug controversy, made it possible to explicitly pass arguments to init. To achieve this parse_args() was extended from simply returning an error code to returning a pointer. Regretably the new init args logic does not perform a proper validity check on the pointer resulting in a crash. This patch fixes the validity check. Should the check fail then no arguments will be passed to init. This is reasonable and matches how the kernel treats its own arguments (i.e. no error recovery). Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: stable@vger.kernel.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-11-11iwlwifi: pcie: fix prph dump lengthLiad Kaufman
The length counting previously done had an error in it, causing the length down the data dumping function to be shorter than it should be, causing the end of the data to get truncated off and lost. Cc: <stable@vger.kernel.org> [3.17+] Fixes: 67c65f2cf710 ("iwlwifi: dump periphery registers to fw-error-dump") Signed-off-by: Liad Kaufman <liad.kaufman@intel.com> Reviewed-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2014-11-11iwlwifi: mvm: abort scan upon RFKILLEmmanuel Grumbach
This code existed but not for all the different FW APIs we support. Fix this. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2014-11-10platform: hp_accel: Add SERIO_I8042 as a dependency since it now includes ↵Giedrius Statkevicius
i8042.h/serio.h Make hp_accel dependent on SERIO_I8042 in the Kconfig because since commit a4c724d0723b078e4ab4670e557cda1795036a7a ('platform: hp_accel: add a i8042 filter to remove HPQ6000 data from kb bus stream') hp_accel includes i8042.h and serio.h. Reported-by: Jim Davis <jim.epost@gmail.com> Signed-off-by: Giedrius Statkevičius <giedriuswork@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2014-11-10ARM: OMAP4+: PM: Program CPU logic power stateNishanth Menon
CPU logic power state is never programmed in either the initialization or the suspend/resume logic, instead, we depend on mpuss to program this properly. However, this leaves CPU logic power state indeterminate and most probably in reset configuration (If bootloader or other similar software have'nt monkeyed with the register). This can make powerstate= RET be either programmed for CSWR (logic=ret) or OSWR(logic = OFF) and in OSWR, there can be context loss when the code does not expect it. To prevent all these confusions, just support clearly ON, INA, CSWR, OFF which is the intent of the existing code by explicitly programming logic state. NOTE: since this is a hot path (using in cpuidle), the exit path just programs powerstate (logic state is immaterial when powerstate is ON). Without doing this, we end up with lockups when CPUs enter OSWR and multiple blocks loose context, when we expect them to hit CSWR. Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: OMAP4+: PM: Centralize static dependency mapping tableNishanth Menon
As we add more static dependency mapping for various errata, the logic gets clunkier. Since it is a simple lookup and map logic, centralize the same and provide the mapping as a simple list. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: OMAP4: PM: Only do static dependency configuration in ↵Nishanth Menon
omap4_init_static_deps Commit 705814b5ea6f ("ARM: OMAP4+: PM: Consolidate OMAP4 PM code to re-use it for OMAP5") Moved logic generic for OMAP5+ as part of the init routine by introducing omap4_pm_init. However, the patch left the powerdomain initial setup, an unused omap4430 es1.0 check and a spurious log "Power Management for TI OMAP4." in the original code. Remove the duplicate code which is already present in omap4_pm_init from omap4_init_static_deps. As part of this change, also move the u-boot version print out of the static dependency function to the omap4_pm_init function. Fixes: 705814b5ea6f ("ARM: OMAP4+: PM: Consolidate OMAP4 PM code to re-use it for OMAP5") Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10w1: omap-hdq: support device probing with device-treeNeilBrown
This driver has no 'compatible' string and so is not found when using device-tree. Add one with value to match hdqw1w: 1w@480b2000 { device in omap3.dtsi. Signed-off-by: NeilBrown <neilb@suse.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra7: add labels to DWC3 nodesFelipe Balbi
by adding labels to DWC3 nodes, it's far easier for boards to reference them. Signed-off-by: Felipe Balbi <balbi@ti.com> [tony@atomide.com: updated for otg 4 move to dra74x.dtsi] Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10scsi: Fix more error handling in SCSI_IOCTL_SEND_COMMANDTony Battersby
Fix an error path in SCSI_IOCTL_SEND_COMMAND that calls blk_put_request(rq) on an invalid IS_ERR(rq) pointer. Fixes: a492f075450f ("block,scsi: fixup blk_get_request dead queue scenarios") Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-11-10ARM: dts: dra72x-evm: Enable CPSW and MDIOMugunthan V N
Adding CPSW phy-id, CPSW and MDIO pinmux configuration for active and sleep states and enable them in board evm dts file. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10pinctrl: dra: dt-bindings: Fix output pull up/downRoger Quadros
For PIN_OUTPUT_PULLUP and PIN_OUTPUT_PULLDOWN we must not set the PULL_DIS bit which disables the PULLs. PULL_ENA is a 0 and using it in an OR operation is a NOP, so don't use it in the PIN_OUTPUT_PULLUP/DOWN macros. Fixes: 23d9cec07c58 ("pinctrl: dra: dt-bindings: Fix pull enable/disable") Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra7-evm: Keep all VDD rails always-onNishanth Menon
DRA7 Data Manual (SPRS857L - August 2014) section 4.1.1 states: "All unused power supply balls must be supplied with the voltages specified in the Section 5.2, Recommended Operating Conditions". This implies that all unused voltage rails for Vayu can never be switched off even if the hardware blocks inside that voltage domain is unused. Switching off these unused rails may result in stability issues on other domains and increased leakage and power-on-hour impacts. J6eco-evm dts file already considers this, however j6evm-dts file needs to be fixed to consider this constraint of the SoC. Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra72-evm: Add MMC nodesNishanth Menon
Add MMC1 and 2 nodes. MMC1 is SDcard and MMC2 is eMMC. NOTE on MMC1 card detect: Ideally, we should be using in-built SDCD support, but we dont have it yet. So, use the fact that control module of DRA7 is setup such that no matter what mode one configures it, GPIO option is always hardwired in - use GPIO mode for SDcard detection. [peter.ujfalusi@ti.com] The power line feeding the SD card is also used by other devices on the EVM. Use generic name instead of mmc2_3v3 so when other devices want to use the same regulator it will look a bit better. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra72-evm: Add power button nodeNishanth Menon
With Commit adff5962fdd2 ("Input: introduce palmas-pwrbutton"), we can now support tps power button as a event source - This is SW7 (PB/WAKE) on the J6-evm. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra72-evm: Provide explicit pinmux for TPS PMICNishanth Menon
Even thought sys_nirq1 is hardwired on the SoC for the pin, it is better to configure the pin to the required mux configuration. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra72-evm: Add regulator information to USB2 PHYsRoger Quadros
The ldo4_reg regulator provides power to the USB1 and USB2 High Speed PHYs. Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra72-evm: Enable USB support for dra72-evm.George Cherian
Add USB data and pinctrl for USB. Signed-off-by: George Cherian <george.cherian@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: DRA7: Move USB_OTG 4 to dra74x.dtsiRoger Quadros
The 4th USB controller instance present only on the DRA74x family of devices so move it there. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Nishanth Menon <nm@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra72-evm: Add NAND supportRoger Quadros
DRA72-evm has a 256MB 16-bit wide NAND chip. Add pinmux and NAND node. The NAND chips 'Chip select' and 'Write protect' can be controlled using DIP Switch SW5. To use NAND, the switch must be configured like so: SW5.1 (NAND_SELn) = ON (LOW) SW5.9 (GPMC_WPN) = OFF (HIGH) Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Tested-by: Nishanth Menon <nm@ti.com> Acked-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra7-evm: Enable CPSW and MDIO for dra7xx EVMMugunthan V N
Adding CPSW phy-id, CPSW and MDIO pinmux configuration for active and sleep states and enable them in board evm dts file. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra7: Add CPSW and MDIO module nodes for dra7Mugunthan V N
Add CPSW and MDIO related device tree data for DRA7XX and made as status disabled. Phy-id, pinmux for active and sleep state needs to be added in board dts files and enable the CPSW device. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: omap3-gta04: Use omap specific pinctrl definesMarek Belisko
Use omap specific pinctrl defines (OMAP3_CORE1_IOPAD) to configure the padconf register offset. Signed-off-by: Marek Belisko <marek@goldelico.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: sbc-t3x: add DVI display dataDmitry Lifshitz
Add DSS related pinmux and display data nodes required to support DVI video out on SBC-T3530, SBC-T3730 and SBC-T3517. Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il> Acked-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: dra7: add DMA properties for UARTSebastian Andrzej Siewior
Cc: devicetree@vger.kernel.org Reviewed-by: Tony Lindgren <tony@atomide.com> Tested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10tracing: Do not risk busy looping in buffer spliceRabin Vincent
If the read loop in trace_buffers_splice_read() keeps failing due to memory allocation failures without reading even a single page then this function will keep busy looping. Remove the risk for that by exiting the function if memory allocation failures are seen. Link: http://lkml.kernel.org/r/1415309167-2373-2-git-send-email-rabin@rab.in Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-11-10tracing: Do not busy wait in buffer spliceRabin Vincent
On a !PREEMPT kernel, attempting to use trace-cmd results in a soft lockup: # trace-cmd record -e raw_syscalls:* -F false NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [trace-cmd:61] ... Call Trace: [<ffffffff8105b580>] ? __wake_up_common+0x90/0x90 [<ffffffff81092e25>] wait_on_pipe+0x35/0x40 [<ffffffff810936e3>] tracing_buffers_splice_read+0x2e3/0x3c0 [<ffffffff81093300>] ? tracing_stats_read+0x2a0/0x2a0 [<ffffffff812d10ab>] ? _raw_spin_unlock+0x2b/0x40 [<ffffffff810dc87b>] ? do_read_fault+0x21b/0x290 [<ffffffff810de56a>] ? handle_mm_fault+0x2ba/0xbd0 [<ffffffff81095c80>] ? trace_event_buffer_lock_reserve+0x40/0x80 [<ffffffff810951e2>] ? trace_buffer_lock_reserve+0x22/0x60 [<ffffffff81095c80>] ? trace_event_buffer_lock_reserve+0x40/0x80 [<ffffffff8112415d>] do_splice_to+0x6d/0x90 [<ffffffff81126971>] SyS_splice+0x7c1/0x800 [<ffffffff812d1edd>] tracesys_phase2+0xd3/0xd8 The problem is this: tracing_buffers_splice_read() calls ring_buffer_wait() to wait for data in the ring buffers. The buffers are not empty so ring_buffer_wait() returns immediately. But tracing_buffers_splice_read() calls ring_buffer_read_page() with full=1, meaning it only wants to read a full page. When the full page is not available, tracing_buffers_splice_read() tries to wait again with ring_buffer_wait(), which again returns immediately, and so on. Fix this by adding a "full" argument to ring_buffer_wait() which will make ring_buffer_wait() wait until the writer has left the reader's page, i.e. until full-page reads will succeed. Link: http://lkml.kernel.org/r/1415645194-25379-1-git-send-email-rabin@rab.in Cc: stable@vger.kernel.org # 3.16+ Fixes: b1169cc69ba9 ("tracing: Remove mock up poll wait function") Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-11-10parisc: Avoid using CONFIG_64BIT in userspace exported headersHelge Deller
The gcc compiler provide the predefined __LP64__ macro. Use that instead. Signed-off-by: Helge Deller <deller@gmx.de>
2014-11-10parisc: Use compat layer for msgctl, shmat, shmctl and semtimedop syscallsHelge Deller
Switch over the msgctl, shmat, shmctl and semtimedop syscalls to use the compat layer. The problem was found with the debian procenv package, which called shmctl(0, SHM_INFO, &info); in which the shmctl syscall then overwrote parts of the surrounding areas on the stack on which the info variable was stored and thus lead to a segfault later on. Additionally fix the definition of struct shminfo64 to use unsigned longs like the other architectures. This has no impact on userspace since we only have a 32bit userspace up to now. Signed-off-by: Helge Deller <deller@gmx.de> Cc: John David Anglin <dave.anglin@bell.net> Cc: <stable@vger.kernel.org> # v3.10+
2014-11-10parisc: Use BUILD_BUG() instead of undefined functionsHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2014-11-10parisc: Wire up bpf syscallHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2014-11-10usb: dwc3: ep0: fix for dead codeFelipe Balbi
commit 6856d30 (usb: dwc3: ep0: return early on NULL requests) tried to fix a minor corner case where we could dereference a NULL pointer but it also ended up introducing some dead code. Unfortunately, that dead code, if reached, could end up starving the endpoint request list because a request would never be given back when it should. Fix this by moving the check for empty request list before its first use. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-11-10MAINTAINERS: Update entry for omap related .dts files to cover new SoCsNishanth Menon
DRA7(including AM5x) and AM47x series are handled under OMAP umbrella. These SoC support and dts have been added since 3.14 kernel and Pull requests for these have come in from OMAP till date. So just ensure that get_maintainers can pick up this list as well. Cc: linux-omap@vger.kernel.org Cc: devicetree@vger.kernel.org Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Benoît Cousson <bcousson@baylibre.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10MAINTAINERS: add more files under OMAP SUPPORTFelipe Balbi
These files are very important to the healt of the OMAP architecture, specially when it comes to PM support which currently we have working for at least OMAP3 and we'd like to know about any changes being made to our PMICs and IRQ controllers. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: AM437x-SK-EVM: Fix DCDC3 voltageKeerthy
DCDC3 supplies voltage to DDR. Fix DCDC3 volatge to 1.5V which is the reset value. Programming to a non-reset value while executing from DDR will result in random hangs. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: AM437x-GP-EVM: Fix DCDC3 voltageKeerthy
DCDC3 supplies voltage to DDR. Fix DCDC3 volatge to 1.5V which is the reset value. Programming to a non-reset value while executing from DDR will result in random hangs. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10ARM: dts: AM43x-EPOS-EVM: Fix DCDC3 voltageKeerthy
DCDC3 supplies voltage to DDR. Fix DCDC3 volatge to 1.5V which is the reset value. Programming to a non-reset value while executing from DDR will result in random hangs. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-11-10dm cache: improve discard supportJoe Thornber
Safely allow the discard blocksize to be larger than the cache blocksize by using the bio prison's range locking support. This also improves discard performance considerly because larger discards are issued to the dm-cache device. The discard blocksize was always intended to be greater than the cache blocksize. But until now it wasn't implemented safely. Also, by safely restoring the ability to have discard blocksize larger than cache blocksize we're able to significantly reduce the memory used for the cache's discard bitset. Before, with a small discard blocksize, the discard bitset could get quite large because its size is a function of the discard blocksize and the origin device's size. For example, previously, using a 32KB cache blocksize with a 40TB origin resulted in 1280MB of incore memory use for the discard bitset! Now, the discard blocksize is scaled up accordingly to ensure the discard bitset is capped at 2**14 bits, or 16KB. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm cache: revert "prevent corruption caused by discard_block_size > ↵Joe Thornber
cache_block_size" This reverts commit d132cc6d9e92424bb9d4fd35f5bd0e55d583f4be because we actually do want to allow the discard blocksize to be larger than the cache blocksize. Further dm-cache discard changes will make this possible. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm cache: revert "remove remainder of distinct discard block size"Joe Thornber
This reverts commit 64ab346a360a4b15c28fb8531918d4a01f4eabd9 because we actually do want to allow the discard blocksize to be larger than the cache blocksize. Further dm-cache discard changes will make this possible. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm bio prison: introduce support for locking ranges of blocksJoe Thornber
Ranges will be placed in the same cell if they overlap. Range locking is a prerequisite for more efficient multi-block discard support in both the cache and thin-provisioning targets. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm cache policy mq: simplify ability to promote sequential IO to the cacheMike Snitzer
Before, if the user wanted sequential IO to be promoted to the cache they'd have to set sequential_threshold to some nebulous large value. Now, the user may easily disable sequential IO detection (and sequential IO's implicit bypass of the cache) by setting sequential_threshold to 0. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm cache policy mq: tweak algorithm that decides when to promote a blockJoe Thornber
Rather than maintaining a separate promote_threshold variable that we periodically update we now use the hit count of the oldest clean block. Also add a fudge factor to discourage demoting dirty blocks. With some tests this has a sizeable difference, because the old code was too eager to demote blocks. For example, device-mapper-test-suite's git_extract_cache_quick test goes from taking 190 seconds, to 142 (linear on spindle takes 250). Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm: do not call dm_sync_table() when creating new devicesHannes Reinecke
When creating new devices dm_sync_table() calls synchronize_rcu_expedited(), causing _all_ pending RCU pointers to be flushed. This causes a latency overhead that is especially noticeable when creating lots of devices. And all of this is pointless as there are no old maps to be disconnected, and hence no stale pointers which would need to be cleared up. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm: sparse: Annotate field with __rcu for checkingPranith Kumar
Annotate the map field with __rcu since this is a rcu pointer which is checked by sparse. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm: Use rcu_dereference() for accessing rcu pointerPranith Kumar
The map field in 'struct mapped_device' is an rcu pointer. Use rcu_dereference() while accessing it. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm thin: refactor requeue_io to eliminate spinlock bouncingMike Snitzer
Also refactor some other bio_list erroring helpers. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-11-10dm thin: optimize retry_bios_on_resumeMike Snitzer
Eliminate redundant should_error_unserviceable_bio check and error loop. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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